Index: lucene/contrib/misc/src/java/org/apache/lucene/store/NRTCachingDirectory.java
--- lucene/contrib/misc/src/java/org/apache/lucene/store/NRTCachingDirectory.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/contrib/misc/src/java/org/apache/lucene/store/NRTCachingDirectory.java	Sat May 28 12:36:07 2011 -0400
@@ -269,7 +269,7 @@
         in = cache.openInput(fileName);
         in.copyBytes(out, in.length());
       } finally {
-        IOUtils.closeSafely(in, out);
+        IOUtils.closeSafely(false, in, out);
       }
       synchronized(this) {
         cache.deleteFile(fileName);
Index: lucene/src/java/org/apache/lucene/index/CompoundFileWriter.java
--- lucene/src/java/org/apache/lucene/index/CompoundFileWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/CompoundFileWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -219,7 +219,7 @@
         } catch (IOException e) {
           priorException = e;
         } finally {
-          IOUtils.closeSafely(priorException, os);
+          IOUtils.closeSafelyPriorEx(priorException, os);
         }
     }
 
Index: lucene/src/java/org/apache/lucene/index/DocFieldProcessor.java
--- lucene/src/java/org/apache/lucene/index/DocFieldProcessor.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/DocFieldProcessor.java	Sat May 28 12:36:07 2011 -0400
@@ -84,19 +84,44 @@
 
   @Override
   public void abort() {
-    for(int i=0;i<fieldHash.length;i++) {
-      DocFieldProcessorPerField field = fieldHash[i];
-      while(field != null) {
+    Throwable th = null;
+    
+    for (DocFieldProcessorPerField field : fieldHash) {
+      while (field != null) {
         final DocFieldProcessorPerField next = field.next;
-        field.abort();
+        try {
+          field.abort();
+        } catch (Throwable t) {
+          if (th == null) {
+            th = t;
+          }
+        }
         field = next;
       }
     }
-
+    
     try {
       fieldsWriter.abort();
-    } finally {
+    } catch (Throwable t) {
+      if (th == null) {
+        th = t;
+      }
+    }
+    
+    try {
       consumer.abort();
+    } catch (Throwable t) {
+      if (th == null) {
+        th = t;
+      }
+    }
+    
+    // If any errors occured, throw it.
+    if (th != null) {
+      if (th instanceof RuntimeException) throw (RuntimeException) th;
+      if (th instanceof Error) throw (Error) th;
+      // defensive code - we should not hit unchecked exceptions
+      throw new RuntimeException(th);
     }
   }
 
Index: lucene/src/java/org/apache/lucene/index/DocInverter.java
--- lucene/src/java/org/apache/lucene/index/DocInverter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/DocInverter.java	Sat May 28 12:36:07 2011 -0400
@@ -87,6 +87,7 @@
     endConsumer.startDocument();
   }
 
+  @Override
   public void finishDocument() throws IOException {
     // TODO: allow endConsumer.finishDocument to also return
     // a DocWriter
Index: lucene/src/java/org/apache/lucene/index/DocInverterPerField.java
--- lucene/src/java/org/apache/lucene/index/DocInverterPerField.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/DocInverterPerField.java	Sat May 28 12:36:07 2011 -0400
@@ -53,8 +53,11 @@
 
   @Override
   void abort() {
-    consumer.abort();
-    endConsumer.abort();
+    try {
+      consumer.abort();
+    } finally {
+      endConsumer.abort();
+    }
   }
 
   @Override
Index: lucene/src/java/org/apache/lucene/index/FieldsWriter.java
--- lucene/src/java/org/apache/lucene/index/FieldsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/FieldsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -113,7 +113,7 @@
   void close() throws IOException {
     if (directory != null) {
       try {
-        IOUtils.closeSafely(fieldsStream, indexStream);
+        IOUtils.closeSafely(false, fieldsStream, indexStream);
       } finally {
         fieldsStream = indexStream = null;
       }
Index: lucene/src/java/org/apache/lucene/index/NormsWriter.java
--- lucene/src/java/org/apache/lucene/index/NormsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/NormsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -22,6 +22,7 @@
 import java.util.Map;
 
 import org.apache.lucene.store.IndexOutput;
+import org.apache.lucene.util.IOUtils;
 
 // TODO FI: norms could actually be stored as doc store
 
@@ -49,7 +50,7 @@
 
     final String normsFileName = IndexFileNames.segmentFileName(state.segmentName, "", IndexFileNames.NORMS_EXTENSION);
     IndexOutput normsOut = state.directory.createOutput(normsFileName);
-
+    boolean success = false;
     try {
       normsOut.writeBytes(SegmentNorms.NORMS_HEADER, 0, SegmentNorms.NORMS_HEADER.length);
 
@@ -84,9 +85,9 @@
 
         assert 4+normCount*state.numDocs == normsOut.getFilePointer() : ".nrm file size mismatch: expected=" + (4+normCount*state.numDocs) + " actual=" + normsOut.getFilePointer();
       }
-
+      success = true;
     } finally {
-      normsOut.close();
+      IOUtils.closeSafely(!success, normsOut);
     }
   }
 
Index: lucene/src/java/org/apache/lucene/index/PerFieldCodecWrapper.java
--- lucene/src/java/org/apache/lucene/index/PerFieldCodecWrapper.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/PerFieldCodecWrapper.java	Sat May 28 12:36:07 2011 -0400
@@ -30,6 +30,7 @@
 import org.apache.lucene.index.codecs.FieldsProducer;
 import org.apache.lucene.index.codecs.TermsConsumer;
 import org.apache.lucene.store.Directory;
+import org.apache.lucene.util.IOUtils;
 
 /**
  * Enables native per field codec support. This class selects the codec used to
@@ -74,21 +75,27 @@
 
     @Override
     public void close() throws IOException {
+      // TODO would be nice if we could use IOUtils.closeSafely - can do that
+      // only if we convert the list to an array
+//      IOUtils.closeSafelyIterable(false, consumers);
       Iterator<FieldsConsumer> it = consumers.iterator();
-      IOException err = null;
+      Throwable th = null;
       while (it.hasNext()) {
         try {
           it.next().close();
-        } catch (IOException ioe) {
-          // keep first IOException we hit but keep
-          // closing the rest
-          if (err == null) {
-            err = ioe;
+        } catch (Throwable t) {
+          // keep first error we hit but keep closing the rest
+          if (th == null) {
+            th = t;
           }
         }
       }
-      if (err != null) {
-        throw err;
+      
+      if (th != null) {
+        if (th instanceof IOException) throw (IOException) th;
+        if (th instanceof RuntimeException) throw (RuntimeException) th;
+        if (th instanceof Error) throw (Error) th;
+        throw new RuntimeException(th);
       }
     }
   }
@@ -177,21 +184,24 @@
 
     @Override
     public void close() throws IOException {
+      // TODO: use IOUtils.closeSafely
       Iterator<FieldsProducer> it = codecs.values().iterator();
-      IOException err = null;
+      Throwable th = null;
       while (it.hasNext()) {
         try {
           it.next().close();
-        } catch (IOException ioe) {
-          // keep first IOException we hit but keep
-          // closing the rest
-          if (err == null) {
-            err = ioe;
+        } catch (Throwable t) {
+          // keep first error we hit but keep closing the rest
+          if (th == null) {
+            th = t;
           }
         }
       }
-      if (err != null) {
-        throw err;
+      if (th != null) {
+        if (th instanceof IOException) throw (IOException) th;
+        if (th instanceof RuntimeException) throw (RuntimeException) th;
+        if (th instanceof Error) throw (Error) th;
+        throw new RuntimeException(th);
       }
     }
 
Index: lucene/src/java/org/apache/lucene/index/SegmentInfos.java
--- lucene/src/java/org/apache/lucene/index/SegmentInfos.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/SegmentInfos.java	Sat May 28 12:36:07 2011 -0400
@@ -40,6 +40,7 @@
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.store.NoSuchDirectoryException;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.ThreadInterruptedException;
 
 /**
@@ -323,17 +324,13 @@
       SegmentInfosWriter infosWriter = codecs.getSegmentInfosWriter();
       segnOutput = infosWriter.writeInfos(directory, segmentFileName, this);
       infosWriter.prepareCommit(segnOutput);
+      pendingSegnOutput = segnOutput;
       success = true;
-      pendingSegnOutput = segnOutput;
     } finally {
       if (!success) {
         // We hit an exception above; try to close the file
         // but suppress any exception:
-        try {
-          segnOutput.close();
-        } catch (Throwable t) {
-          // Suppress so we keep throwing the original exception
-        }
+        IOUtils.closeSafely(true, segnOutput);
         try {
           // Try not to leave a truncated segments_N file in
           // the index:
@@ -945,9 +942,12 @@
       } finally {
         genOutput.close();
       }
+    } catch (ThreadInterruptedException t) {
+      throw t;
     } catch (Throwable t) {
       // It's OK if we fail to write this file since it's
       // used only as one of the retry fallbacks.
+      // nocommit if this is thread interrupted we should rethrow
     }
   }
 
Index: lucene/src/java/org/apache/lucene/index/SegmentMerger.java
--- lucene/src/java/org/apache/lucene/index/SegmentMerger.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/SegmentMerger.java	Sat May 28 12:36:07 2011 -0400
@@ -34,6 +34,7 @@
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.util.Bits;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.MultiBits;
 import org.apache.lucene.util.ReaderUtil;
 
@@ -546,14 +547,13 @@
     }
     codec = segmentWriteState.segmentCodecs.codec();
     final FieldsConsumer consumer = codec.fieldsConsumer(segmentWriteState);
-
-    // NOTE: this is silly, yet, necessary -- we create a
-    // MultiBits as our skip docs only to have it broken
-    // apart when we step through the docs enums in
-    // MultiDocsEnum.
-    mergeState.multiDeletedDocs = new MultiBits(bits, bitsStarts);
-
     try {
+      // NOTE: this is silly, yet, necessary -- we create a
+      // MultiBits as our skip docs only to have it broken
+      // apart when we step through the docs enums in
+      // MultiDocsEnum.
+      mergeState.multiDeletedDocs = new MultiBits(bits, bitsStarts);
+      
       consumer.merge(mergeState,
                      new MultiFields(fields.toArray(Fields.EMPTY_ARRAY),
                                      slices.toArray(ReaderUtil.Slice.EMPTY_ARRAY)));
@@ -579,6 +579,7 @@
 
   private void mergeNorms() throws IOException {
     IndexOutput output = null;
+    boolean success = false;
     try {
       for (FieldInfo fi : fieldInfos) {
         if (fi.isIndexed && !fi.omitNorms) {
@@ -612,10 +613,9 @@
           }
         }
       }
+      success = true;
     } finally {
-      if (output != null) {
-        output.close();
-      }
+      IOUtils.closeSafely(!success, output);
     }
   }
 }
Index: lucene/src/java/org/apache/lucene/index/TermVectorsTermsWriter.java
--- lucene/src/java/org/apache/lucene/index/TermVectorsTermsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/TermVectorsTermsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -54,9 +54,7 @@
       fill(state.numDocs);
       assert state.segmentName != null;
       String idxName = IndexFileNames.segmentFileName(state.segmentName, "", IndexFileNames.VECTORS_INDEX_EXTENSION);
-      tvx.close();
-      tvf.close();
-      tvd.close();
+      IOUtils.closeSafely(false, tvx, tvf, tvd);
       tvx = tvd = tvf = null;
       if (4+((long) state.numDocs)*16 != state.directory.fileLength(idxName)) {
         throw new RuntimeException("after flush: tvx size mismatch: " + state.numDocs + " docs vs " + state.directory.fileLength(idxName) + " length in bytes of " + idxName + " file exists?=" + state.directory.fileExists(idxName));
@@ -89,18 +87,25 @@
 
   private final void initTermVectorsWriter() throws IOException {
     if (tvx == null) {
+      boolean success = false;
+      try {
+        // If we hit an exception while init'ing the term
+        // vector output files, we must abort this segment
+        // because those files will be in an unknown
+        // state:
+        tvx = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_INDEX_EXTENSION));
+        tvd = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));
+        tvf = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_FIELDS_EXTENSION));
 
-      // If we hit an exception while init'ing the term
-      // vector output files, we must abort this segment
-      // because those files will be in an unknown
-      // state:
-      tvx = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_INDEX_EXTENSION));
-      tvd = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));
-      tvf = docWriter.directory.createOutput(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_FIELDS_EXTENSION));
-
-      tvx.writeInt(TermVectorsReader.FORMAT_CURRENT);
-      tvd.writeInt(TermVectorsReader.FORMAT_CURRENT);
-      tvf.writeInt(TermVectorsReader.FORMAT_CURRENT);
+        tvx.writeInt(TermVectorsReader.FORMAT_CURRENT);
+        tvd.writeInt(TermVectorsReader.FORMAT_CURRENT);
+        tvf.writeInt(TermVectorsReader.FORMAT_CURRENT);
+        success = true;
+      } finally {
+        if (!success) {
+          IOUtils.closeSafely(true, tvx, tvd, tvf);
+        }
+      }
 
       lastDocID = 0;
     }
@@ -152,21 +157,26 @@
   public void abort() {
     hasVectors = false;
     try {
-      IOUtils.closeSafely(tvx, tvd, tvf);
-    } catch (IOException ignored) {
+      IOUtils.closeSafely(true, tvx, tvd, tvf);
+    } catch (IOException e) {
+      // cannot happen since we suppress exceptions
     }
+    
     try {
       docWriter.directory.deleteFile(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_INDEX_EXTENSION));
     } catch (IOException ignored) {
     }
+    
     try {
       docWriter.directory.deleteFile(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));
     } catch (IOException ignored) {
     }
+    
     try {
       docWriter.directory.deleteFile(IndexFileNames.segmentFileName(docWriter.getSegment(), "", IndexFileNames.VECTORS_FIELDS_EXTENSION));
     } catch (IOException ignored) {
     }
+    
     tvx = tvd = tvf = null;
     lastDocID = 0;
 
Index: lucene/src/java/org/apache/lucene/index/TermVectorsWriter.java
--- lucene/src/java/org/apache/lucene/index/TermVectorsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/TermVectorsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -31,15 +31,22 @@
   private FieldInfos fieldInfos;
 
   public TermVectorsWriter(Directory directory, String segment,
-                           FieldInfos fieldInfos)
-    throws IOException {
-    // Open files for TermVector storage
-    tvx = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_INDEX_EXTENSION));
-    tvx.writeInt(TermVectorsReader.FORMAT_CURRENT);
-    tvd = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));
-    tvd.writeInt(TermVectorsReader.FORMAT_CURRENT);
-    tvf = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_FIELDS_EXTENSION));
-    tvf.writeInt(TermVectorsReader.FORMAT_CURRENT);
+                           FieldInfos fieldInfos) throws IOException {
+    boolean success = false;
+    try {
+      // Open files for TermVector storage
+      tvx = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_INDEX_EXTENSION));
+      tvx.writeInt(TermVectorsReader.FORMAT_CURRENT);
+      tvd = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_DOCUMENTS_EXTENSION));
+      tvd.writeInt(TermVectorsReader.FORMAT_CURRENT);
+      tvf = directory.createOutput(IndexFileNames.segmentFileName(segment, "", IndexFileNames.VECTORS_FIELDS_EXTENSION));
+      tvf.writeInt(TermVectorsReader.FORMAT_CURRENT);
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, tvx, tvd, tvf);
+      }
+    }
 
     this.fieldInfos = fieldInfos;
   }
@@ -51,8 +58,7 @@
    * @param vectors
    * @throws IOException
    */
-  public final void addAllDocVectors(TermFreqVector[] vectors)
-      throws IOException {
+  public final void addAllDocVectors(TermFreqVector[] vectors) throws IOException {
 
     tvx.writeLong(tvd.getFilePointer());
     tvx.writeLong(tvf.getFilePointer());
@@ -187,6 +193,6 @@
   final void close() throws IOException {
     // make an effort to close all streams we can but remember and re-throw
     // the first exception encountered in this process
-    IOUtils.closeSafely(tvx, tvd, tvf);
+    IOUtils.closeSafely(false, tvx, tvd, tvf);
   }
 }
Index: lucene/src/java/org/apache/lucene/index/TermsHash.java
--- lucene/src/java/org/apache/lucene/index/TermsHash.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/TermsHash.java	Sat May 28 12:36:07 2011 -0400
@@ -54,7 +54,6 @@
 
   final boolean trackAllocations;
 
-
   public TermsHash(final DocumentsWriterPerThread docWriter, final TermsHashConsumer consumer, boolean trackAllocations, final TermsHash nextTermsHash) {
     this.docState = docWriter.docState;
     this.docWriter = docWriter;
@@ -134,12 +133,9 @@
 
   @Override
   void finishDocument() throws IOException {
-    try {
-      consumer.finishDocument(this);
-    } finally {
-      if (nextTermsHash != null) {
-        nextTermsHash.consumer.finishDocument(nextTermsHash);
-      }
+    consumer.finishDocument(this);
+    if (nextTermsHash != null) {
+      nextTermsHash.consumer.finishDocument(nextTermsHash);
     }
   }
 
Index: lucene/src/java/org/apache/lucene/index/codecs/BlockTermsWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/BlockTermsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/BlockTermsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -31,6 +31,7 @@
 import org.apache.lucene.util.ArrayUtil;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.RamUsageEstimator;
 
 // TODO: currently we encode all terms between two indexed
@@ -66,24 +67,29 @@
 
   //private final String segment;
 
-  public BlockTermsWriter(
-      TermsIndexWriterBase termsIndexWriter,
-      SegmentWriteState state,
-      PostingsWriterBase postingsWriter)
-    throws IOException
-  {
+  public BlockTermsWriter(TermsIndexWriterBase termsIndexWriter,
+      SegmentWriteState state, PostingsWriterBase postingsWriter)
+      throws IOException {
     final String termsFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, TERMS_EXTENSION);
     this.termsIndexWriter = termsIndexWriter;
     out = state.directory.createOutput(termsFileName);
-    fieldInfos = state.fieldInfos;
-    writeHeader(out);
-    currentField = null;
-    this.postingsWriter = postingsWriter;
-    //segment = state.segmentName;
-
-    //System.out.println("BTW.init seg=" + state.segmentName);
-
-    postingsWriter.start(out);                          // have consumer write its format/header
+    boolean success = false;
+    try {
+      fieldInfos = state.fieldInfos;
+      writeHeader(out);
+      currentField = null;
+      this.postingsWriter = postingsWriter;
+      //segment = state.segmentName;
+      
+      //System.out.println("BTW.init seg=" + state.segmentName);
+      
+      postingsWriter.start(out); // have consumer write its format/header
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, out);
+      }
+    }
   }
   
   protected void writeHeader(IndexOutput out) throws IOException {
@@ -130,20 +136,11 @@
       }
       writeTrailer(dirStart);
     } finally {
-      try {
-        out.close();
-      } finally {
-        try {
-          postingsWriter.close();
-        } finally {
-          termsIndexWriter.close();
-        }
-      }
+      IOUtils.closeSafely(false, out, postingsWriter, termsIndexWriter);
     }
   }
 
   protected void writeTrailer(long dirStart) throws IOException {
-    // TODO Auto-generated method stub
     out.seek(CodecUtil.headerLength(CODEC_NAME));
     out.writeLong(dirStart);    
   }
Index: lucene/src/java/org/apache/lucene/index/codecs/DefaultSegmentInfosWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/DefaultSegmentInfosWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/DefaultSegmentInfosWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -24,6 +24,7 @@
 import org.apache.lucene.store.ChecksumIndexOutput;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.store.IndexOutput;
+import org.apache.lucene.util.IOUtils;
 
 /**
  * Default implementation of {@link SegmentInfosWriter}.
@@ -56,16 +57,24 @@
   public IndexOutput writeInfos(Directory dir, String segmentFileName, SegmentInfos infos)
           throws IOException {
     IndexOutput out = createOutput(dir, segmentFileName);
-    out.writeInt(FORMAT_CURRENT); // write FORMAT
-    out.writeLong(infos.version);
-    out.writeInt(infos.counter); // write counter
-    out.writeLong(infos.getGlobalFieldMapVersion());
-    out.writeInt(infos.size()); // write infos
-    for (SegmentInfo si : infos) {
-      si.write(out);
+    boolean success = false;
+    try {
+      out.writeInt(FORMAT_CURRENT); // write FORMAT
+      out.writeLong(infos.version);
+      out.writeInt(infos.counter); // write counter
+      out.writeLong(infos.getGlobalFieldMapVersion());
+      out.writeInt(infos.size()); // write infos
+      for (SegmentInfo si : infos) {
+        si.write(out);
+      }
+      out.writeStringStringMap(infos.getUserData());
+      success = true;
+      return out;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, out);
+      }
     }
-    out.writeStringStringMap(infos.getUserData());
-    return out;
   }
   
   protected IndexOutput createOutput(Directory dir, String segmentFileName)
Index: lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexReader.java
--- lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexReader.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexReader.java	Sat May 28 12:36:07 2011 -0400
@@ -24,6 +24,7 @@
 import org.apache.lucene.index.SegmentInfo;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.PagedBytes;
 import org.apache.lucene.util.packed.PackedInts;
 
@@ -108,6 +109,7 @@
       }
       success = true;
     } finally {
+      if (!success) IOUtils.closeSafely(true, in);
       if (indexDivisor > 0) {
         in.close();
         in = null;
Index: lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/FixedGapTermsIndexWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -25,6 +25,7 @@
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
 import org.apache.lucene.util.ArrayUtil;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.packed.PackedInts;
 
 import java.util.List;
@@ -58,9 +59,17 @@
     final String indexFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, TERMS_INDEX_EXTENSION);
     termIndexInterval = state.termIndexInterval;
     out = state.directory.createOutput(indexFileName);
-    fieldInfos = state.fieldInfos;
-    writeHeader(out);
-    out.writeInt(termIndexInterval);
+    boolean success = false;
+    try {
+      fieldInfos = state.fieldInfos;
+      writeHeader(out);
+      out.writeInt(termIndexInterval);
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, out);
+      }
+    }
   }
   
   protected void writeHeader(IndexOutput out) throws IOException {
@@ -204,31 +213,36 @@
 
   @Override
   public void close() throws IOException {
-    final long dirStart = out.getFilePointer();
-    final int fieldCount = fields.size();
-
-    int nonNullFieldCount = 0;
-    for(int i=0;i<fieldCount;i++) {
-      SimpleFieldWriter field = fields.get(i);
-      if (field.numIndexTerms > 0) {
-        nonNullFieldCount++;
+    boolean success = false;
+    try {
+      final long dirStart = out.getFilePointer();
+      final int fieldCount = fields.size();
+      
+      int nonNullFieldCount = 0;
+      for(int i=0;i<fieldCount;i++) {
+        SimpleFieldWriter field = fields.get(i);
+        if (field.numIndexTerms > 0) {
+          nonNullFieldCount++;
+        }
       }
+      
+      out.writeVInt(nonNullFieldCount);
+      for(int i=0;i<fieldCount;i++) {
+        SimpleFieldWriter field = fields.get(i);
+        if (field.numIndexTerms > 0) {
+          out.writeVInt(field.fieldInfo.number);
+          out.writeVInt(field.numIndexTerms);
+          out.writeVLong(field.termsStart);
+          out.writeVLong(field.indexStart);
+          out.writeVLong(field.packedIndexStart);
+          out.writeVLong(field.packedOffsetsStart);
+        }
+      }
+      writeTrailer(dirStart);
+      success = true;
+    } finally {
+      IOUtils.closeSafely(!success, out);
     }
-
-    out.writeVInt(nonNullFieldCount);
-    for(int i=0;i<fieldCount;i++) {
-      SimpleFieldWriter field = fields.get(i);
-      if (field.numIndexTerms > 0) {
-        out.writeVInt(field.fieldInfo.number);
-        out.writeVInt(field.numIndexTerms);
-        out.writeVLong(field.termsStart);
-        out.writeVLong(field.indexStart);
-        out.writeVLong(field.packedIndexStart);
-        out.writeVLong(field.packedOffsetsStart);
-      }
-    }
-    writeTrailer(dirStart);
-    out.close();
   }
 
   protected void writeTrailer(long dirStart) throws IOException {
Index: lucene/src/java/org/apache/lucene/index/codecs/TermsIndexWriterBase.java
--- lucene/src/java/org/apache/lucene/index/codecs/TermsIndexWriterBase.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/TermsIndexWriterBase.java	Sat May 28 12:36:07 2011 -0400
@@ -19,10 +19,12 @@
 
 import org.apache.lucene.index.FieldInfo;
 import org.apache.lucene.util.BytesRef;
+
+import java.io.Closeable;
 import java.io.IOException;
 
 /** @lucene.experimental */
-public abstract class TermsIndexWriterBase {
+public abstract class TermsIndexWriterBase implements Closeable {
 
   public abstract class FieldWriter {
     public abstract boolean checkIndexTerm(BytesRef text, TermStats stats) throws IOException;
@@ -31,6 +33,4 @@
   }
 
   public abstract FieldWriter addField(FieldInfo fieldInfo, long termsFilePointer) throws IOException;
-
-  public abstract void close() throws IOException;
 }
Index: lucene/src/java/org/apache/lucene/index/codecs/VariableGapTermsIndexWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/VariableGapTermsIndexWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/VariableGapTermsIndexWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -28,6 +28,7 @@
 import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.util.automaton.fst.Builder;
 import org.apache.lucene.util.automaton.fst.FST;
 import org.apache.lucene.util.automaton.fst.PositiveIntOutputs;
@@ -159,9 +160,17 @@
   public VariableGapTermsIndexWriter(SegmentWriteState state, IndexTermSelector policy) throws IOException {
     final String indexFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, TERMS_INDEX_EXTENSION);
     out = state.directory.createOutput(indexFileName);
-    fieldInfos = state.fieldInfos;
-    this.policy = policy;
-    writeHeader(out);
+    boolean success = false;
+    try {
+      fieldInfos = state.fieldInfos;
+      this.policy = policy;
+      writeHeader(out);
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, out);
+      }
+    }
   }
   
   protected void writeHeader(IndexOutput out) throws IOException {
@@ -267,6 +276,7 @@
 
   @Override
   public void close() throws IOException {
+    try {
     final long dirStart = out.getFilePointer();
     final int fieldCount = fields.size();
 
@@ -287,8 +297,10 @@
       }
     }
     writeTrailer(dirStart);
+    } finally {
     out.close();
   }
+  }
 
   protected void writeTrailer(long dirStart) throws IOException {
     out.seek(CodecUtil.headerLength(CODEC_NAME));
Index: lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java
--- lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingCodec.java	Sat May 28 12:36:07 2011 -0400
@@ -38,6 +38,7 @@
 import org.apache.lucene.index.codecs.TermsIndexWriterBase;
 import org.apache.lucene.index.codecs.standard.StandardCodec;
 import org.apache.lucene.store.Directory;
+import org.apache.lucene.util.IOUtils;
 
 /** This codec "inlines" the postings for terms that have
  *  low docFreq.  It wraps another codec, which is used for
@@ -81,7 +82,7 @@
       success = true;
     } finally {
       if (!success) {
-        pulsingWriter.close();
+        IOUtils.closeSafely(true, pulsingWriter);
       }
     }
 
@@ -93,11 +94,7 @@
       return ret;
     } finally {
       if (!success) {
-        try {
-          pulsingWriter.close();
-        } finally {
-          indexWriter.close();
-        }
+        IOUtils.closeSafely(true, pulsingWriter, indexWriter);
       }
     }
   }
Index: lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingPostingsWriterImpl.java
--- lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingPostingsWriterImpl.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/pulsing/PulsingPostingsWriterImpl.java	Sat May 28 12:36:07 2011 -0400
@@ -71,8 +71,6 @@
    *  for this term) is <= maxPositions, then the postings are
    *  inlined into terms dict */
   public PulsingPostingsWriterImpl(int maxPositions, PostingsWriterBase wrappedPostingsWriter) throws IOException {
-    super();
-
     pending = new Position[maxPositions];
     for(int i=0;i<maxPositions;i++) {
       pending[i] = new Position();
Index: lucene/src/java/org/apache/lucene/index/codecs/sep/SepPostingsWriterImpl.java
--- lucene/src/java/org/apache/lucene/index/codecs/sep/SepPostingsWriterImpl.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/sep/SepPostingsWriterImpl.java	Sat May 28 12:36:07 2011 -0400
@@ -31,6 +31,7 @@
 import org.apache.lucene.store.RAMOutputStream;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 
 /** Writes frq to .frq, docs to .doc, pos to .pos, payloads
  *  to .pyl, skip data to .skp
@@ -49,18 +50,18 @@
   final static int VERSION_START = 0;
   final static int VERSION_CURRENT = VERSION_START;
 
-  final IntIndexOutput freqOut;
-  final IntIndexOutput.Index freqIndex;
+  IntIndexOutput freqOut;
+  IntIndexOutput.Index freqIndex;
 
-  final IntIndexOutput posOut;
-  final IntIndexOutput.Index posIndex;
+  IntIndexOutput posOut;
+  IntIndexOutput.Index posIndex;
 
-  final IntIndexOutput docOut;
-  final IntIndexOutput.Index docIndex;
+  IntIndexOutput docOut;
+  IntIndexOutput.Index docIndex;
 
-  final IndexOutput payloadOut;
+  IndexOutput payloadOut;
 
-  final IndexOutput skipOut;
+  IndexOutput skipOut;
   IndexOutput termsOut;
 
   final SepSkipListWriter skipListWriter;
@@ -107,44 +108,51 @@
   }
 
   public SepPostingsWriterImpl(SegmentWriteState state, IntStreamFactory factory, int skipInterval) throws IOException {
-    super();
-    this.skipInterval = skipInterval;
-    this.skipMinimum = skipInterval; /* set to the same for now */
-    final String docFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, DOC_EXTENSION);
-    docOut = factory.createOutput(state.directory, docFileName);
-    docIndex = docOut.index();
+    freqOut = null;
+    freqIndex = null;
+    posOut = null;
+    posIndex = null;
+    payloadOut = null;
+    boolean success = false;
+    try {
+      this.skipInterval = skipInterval;
+      this.skipMinimum = skipInterval; /* set to the same for now */
+      final String docFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, DOC_EXTENSION);
+      docOut = factory.createOutput(state.directory, docFileName);
+      docIndex = docOut.index();
+      
+      if (state.fieldInfos.hasProx()) {
+        final String frqFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, FREQ_EXTENSION);
+        freqOut = factory.createOutput(state.directory, frqFileName);
+        freqIndex = freqOut.index();
+        
+        final String posFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, POS_EXTENSION);
+        posOut = factory.createOutput(state.directory, posFileName);
+        posIndex = posOut.index();
+        
+        // TODO: -- only if at least one field stores payloads?
+        final String payloadFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, PAYLOAD_EXTENSION);
+        payloadOut = state.directory.createOutput(payloadFileName);
+      }
+      
+      final String skipFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, SKIP_EXTENSION);
+      skipOut = state.directory.createOutput(skipFileName);
+      
+      totalNumDocs = state.numDocs;
+      
+      skipListWriter = new SepSkipListWriter(skipInterval,
+          maxSkipLevels,
+          state.numDocs,
+          freqOut, docOut,
+          posOut, payloadOut);
+      
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, docOut, skipOut, freqOut, posOut, payloadOut);
+      }
 
-    if (state.fieldInfos.hasProx()) {
-      final String frqFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, FREQ_EXTENSION);
-      freqOut = factory.createOutput(state.directory, frqFileName);
-      freqIndex = freqOut.index();
-
-      final String posFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, POS_EXTENSION);
-      posOut = factory.createOutput(state.directory, posFileName);
-      posIndex = posOut.index();
-
-      // TODO: -- only if at least one field stores payloads?
-      final String payloadFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, PAYLOAD_EXTENSION);
-      payloadOut = state.directory.createOutput(payloadFileName);
-
-    } else {
-      freqOut = null;
-      freqIndex = null;
-      posOut = null;
-      posIndex = null;
-      payloadOut = null;
     }
-
-    final String skipFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, SKIP_EXTENSION);
-    skipOut = state.directory.createOutput(skipFileName);
-
-    totalNumDocs = state.numDocs;
-
-    skipListWriter = new SepSkipListWriter(skipInterval,
-                                           maxSkipLevels,
-                                           state.numDocs,
-                                           freqOut, docOut,
-                                           posOut, payloadOut);
   }
 
   @Override
@@ -306,25 +314,7 @@
 
   @Override
   public void close() throws IOException {
-    try {
-      docOut.close();
-    } finally {
-      try {
-        skipOut.close();
-      } finally {
-        if (freqOut != null) {
-          try {
-            freqOut.close();
-          } finally {
-            try {
-              posOut.close();
-            } finally {
-              payloadOut.close();
-            }
-          }
-        }
-      }
-    }
+    IOUtils.closeSafely(false, docOut, skipOut, freqOut, posOut, payloadOut);
   }
 
   public static void getExtensions(Set<String> extensions) {
Index: lucene/src/java/org/apache/lucene/index/codecs/simpletext/SimpleTextFieldsWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/simpletext/SimpleTextFieldsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/simpletext/SimpleTextFieldsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -143,8 +143,11 @@
 
   @Override
   public void close() throws IOException {
-    write(END);
-    newline();
-    out.close();
+    try {
+      write(END);
+      newline();
+    } finally {
+      out.close();
+    }
   }
 }
Index: lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsWriter.java
--- lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/index/codecs/standard/StandardPostingsWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -33,6 +33,7 @@
 import org.apache.lucene.store.RAMOutputStream;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 
 /** @lucene.experimental */
 public final class StandardPostingsWriter extends PostingsWriterBase {
@@ -42,8 +43,8 @@
   final static int VERSION_START = 0;
   final static int VERSION_CURRENT = VERSION_START;
 
-  final IndexOutput freqOut;
-  final IndexOutput proxOut;
+  IndexOutput freqOut;
+  IndexOutput proxOut;
   final DefaultSkipListWriter skipListWriter;
   /** Expert: The fraction of TermDocs entries stored in skip tables,
    * used to accelerate {@link DocsEnum#advance(int)}.  Larger values result in
@@ -85,31 +86,35 @@
   public StandardPostingsWriter(SegmentWriteState state) throws IOException {
     this(state, DEFAULT_SKIP_INTERVAL);
   }
+  
   public StandardPostingsWriter(SegmentWriteState state, int skipInterval) throws IOException {
-    super();
     this.skipInterval = skipInterval;
     this.skipMinimum = skipInterval; /* set to the same for now */
     //this.segment = state.segmentName;
     String fileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, StandardCodec.FREQ_EXTENSION);
     freqOut = state.directory.createOutput(fileName);
-
-    if (state.fieldInfos.hasProx()) {
-      // At least one field does not omit TF, so create the
-      // prox file
-      fileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, StandardCodec.PROX_EXTENSION);
-      proxOut = state.directory.createOutput(fileName);
-    } else {
-      // Every field omits TF so we will write no prox file
-      proxOut = null;
+    boolean success = false;
+    try {
+      if (state.fieldInfos.hasProx()) {
+        // At least one field does not omit TF, so create the
+        // prox file
+        fileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, StandardCodec.PROX_EXTENSION);
+        proxOut = state.directory.createOutput(fileName);
+      } else {
+        // Every field omits TF so we will write no prox file
+        proxOut = null;
+      }
+      
+      totalNumDocs = state.numDocs;
+      
+      skipListWriter = new DefaultSkipListWriter(skipInterval, maxSkipLevels,
+          state.numDocs, freqOut, proxOut);
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, freqOut, proxOut);
+      }
     }
-
-    totalNumDocs = state.numDocs;
-
-    skipListWriter = new DefaultSkipListWriter(skipInterval,
-                                               maxSkipLevels,
-                                               state.numDocs,
-                                               freqOut,
-                                               proxOut);
   }
 
   @Override
@@ -267,12 +272,6 @@
 
   @Override
   public void close() throws IOException {
-    try {
-      freqOut.close();
-    } finally {
-      if (proxOut != null) {
-        proxOut.close();
-      }
-    }
+    IOUtils.closeSafely(false, freqOut, proxOut);
   }
 }
Index: lucene/src/java/org/apache/lucene/store/Directory.java
--- lucene/src/java/org/apache/lucene/store/Directory.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/store/Directory.java	Sat May 28 12:36:07 2011 -0400
@@ -208,7 +208,7 @@
     } catch (IOException ioe) {
       priorException = ioe;
     } finally {
-      IOUtils.closeSafely(priorException, os, is);
+      IOUtils.closeSafelyPriorEx(priorException, os, is);
     }
   }
 
Index: lucene/src/java/org/apache/lucene/util/IOUtils.java
--- lucene/src/java/org/apache/lucene/util/IOUtils.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/java/org/apache/lucene/util/IOUtils.java	Sat May 28 12:36:07 2011 -0400
@@ -19,6 +19,7 @@
 
 import java.io.Closeable;
 import java.io.IOException;
+import java.util.Iterator;
 
 /** @lucene.internal */
 public final class IOUtils {
@@ -46,45 +47,114 @@
    * @param priorException  <tt>null</tt> or an exception that will be rethrown after method completion
    * @param objects         objects to call <tt>close()</tt> on
    */
-  public static <E extends Exception> void closeSafely(E priorException, Closeable... objects) throws E, IOException {
-    IOException firstIOE = null;
+  public static <E extends Exception> void closeSafelyPriorEx(E priorException, Closeable... objects) throws E, IOException {
+    Throwable th = null;
 
     for (Closeable object : objects) {
       try {
-        if (object != null)
+        if (object != null) {
           object.close();
-      } catch (IOException ioe) {
-        if (firstIOE == null)
-          firstIOE = ioe;
+        }
+      } catch (Throwable t) {
+        if (th == null) {
+          th = t;
+        }
       }
     }
 
-    if (priorException != null)
+    if (priorException != null) {
       throw priorException;
-    else if (firstIOE != null)
-      throw firstIOE;
+    } else if (th != null) {
+      if (th instanceof IOException) throw (IOException) th;
+      if (th instanceof RuntimeException) throw (RuntimeException) th;
+      if (th instanceof Error) throw (Error) th;
+      throw new RuntimeException(th);
+    }
+  }
+
+  /** @see #closeSafelyPriorEx(Exception, Closeable...) */
+  public static <E extends Exception> void closeSafelyPriorExIterable(E priorException, Iterable<Closeable> objects) throws E, IOException {
+    Throwable th = null;
+
+    for (Closeable object : objects) {
+      try {
+        if (object != null) {
+          object.close();
+        }
+      } catch (Throwable t) {
+        if (th == null) {
+          th = t;
+        }
+      }
+    }
+
+    if (priorException != null) {
+      throw priorException;
+    } else if (th != null) {
+      if (th instanceof IOException) throw (IOException) th;
+      if (th instanceof RuntimeException) throw (RuntimeException) th;
+      if (th instanceof Error) throw (Error) th;
+      throw new RuntimeException(th);
+    }
   }
 
   /**
-   * <p>Closes all given <tt>Closeable</tt>s, suppressing all thrown exceptions. Some of the <tt>Closeable</tt>s
-   * may be null, they are ignored. After everything is closed, method either throws the first of suppressed exceptions,
-   * or completes normally.</p>
-   * @param objects         objects to call <tt>close()</tt> on
+   * Closes all given <tt>Closeable</tt>s, suppressing all thrown exceptions.
+   * Some of the <tt>Closeable</tt>s may be null, they are ignored. After
+   * everything is closed, and if {@code suppressExceptions} is {@code false},
+   * method either throws the first of suppressed exceptions, or completes
+   * normally.
+   * 
+   * @param suppressExceptions
+   *          if true then exceptions that occur during close() are suppressed
+   * @param objects
+   *          objects to call <tt>close()</tt> on
    */
-  public static void closeSafely(Closeable... objects) throws IOException {
-    IOException firstIOE = null;
+  public static void closeSafely(boolean suppressExceptions, Closeable... objects) throws IOException {
+    Throwable th = null;
 
     for (Closeable object : objects) {
       try {
-        if (object != null)
+        if (object != null) {
           object.close();
-      } catch (IOException ioe) {
-        if (firstIOE == null)
-          firstIOE = ioe;
+        }
+      } catch (Throwable t) {
+        if (th == null)
+          th = t;
       }
     }
 
-    if (firstIOE != null)
-      throw firstIOE;
+    if (th != null && !suppressExceptions) {
+      if (th instanceof IOException) throw (IOException) th;
+      if (th instanceof RuntimeException) throw (RuntimeException) th;
+      if (th instanceof Error) throw (Error) th;
+      throw new RuntimeException(th);
+    }
   }
+  
+  /**
+   * @see #closeSafely(boolean, Closeable...)
+   */
+  public static void closeSafelyIterable(boolean suppressExceptions, Iterable<Closeable> objects) throws IOException {
+    Throwable th = null;
+
+    for (Closeable object : objects) {
+      try {
+        if (object != null) {
+          object.close();
+        }
+      } catch (Throwable t) {
+        if (th == null)
+          th = t;
+      }
+    }
+
+    if (th != null && !suppressExceptions) {
+      if (th instanceof IOException) throw (IOException) th;
+      if (th instanceof RuntimeException) throw (RuntimeException) th;
+      if (th instanceof Error) throw (Error) th;
+      throw new RuntimeException(th);
+    }
+  }
+
 }
Index: lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockFixedIntBlockCodec.java
--- lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockFixedIntBlockCodec.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockFixedIntBlockCodec.java	Sat May 28 12:36:07 2011 -0400
@@ -44,6 +44,7 @@
 import org.apache.lucene.index.codecs.standard.StandardCodec;
 import org.apache.lucene.store.*;
 import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.IOUtils;
 
 /**
  * A silly test codec to verify core support for fixed
@@ -97,15 +98,25 @@
 
     @Override
     public IntIndexOutput createOutput(Directory dir, String fileName) throws IOException {
-      return new FixedIntBlockIndexOutput(dir.createOutput(fileName), blockSize) {
-        @Override
-        protected void flushBlock() throws IOException {
-          for(int i=0;i<buffer.length;i++) {
-            assert buffer[i] >= 0;
-            out.writeVInt(buffer[i]);
+      IndexOutput out = dir.createOutput(fileName);
+      boolean success = false;
+      try {
+        FixedIntBlockIndexOutput ret = new FixedIntBlockIndexOutput(out, blockSize) {
+          @Override
+          protected void flushBlock() throws IOException {
+            for(int i=0;i<buffer.length;i++) {
+              assert buffer[i] >= 0;
+              out.writeVInt(buffer[i]);
+            }
           }
+        };
+        success = true;
+        return ret;
+      } finally {
+        if (!success) {
+          IOUtils.closeSafely(true, out);
         }
-      };
+      }
     }
   }
 
Index: lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockVariableIntBlockCodec.java
--- lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockVariableIntBlockCodec.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/index/codecs/mockintblock/MockVariableIntBlockCodec.java	Sat May 28 12:36:07 2011 -0400
@@ -46,6 +46,7 @@
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.IOUtils;
 
 /**
  * A silly test codec to verify core support for variable
@@ -102,34 +103,42 @@
     @Override
     public IntIndexOutput createOutput(Directory dir, String fileName) throws IOException {
       final IndexOutput out = dir.createOutput(fileName);
-      out.writeInt(baseBlockSize);
-      return new VariableIntBlockIndexOutput(out, 2*baseBlockSize) {
-
-        int pendingCount;
-        final int[] buffer = new int[2+2*baseBlockSize];
-
-        @Override
-        protected int add(int value) throws IOException {
-          assert value >= 0;
-          buffer[pendingCount++] = value;
-          // silly variable block length int encoder: if
-          // first value <= 3, we write N vints at once;
-          // else, 2*N
-          final int flushAt = buffer[0] <= 3 ? baseBlockSize : 2*baseBlockSize;
-
-          // intentionally be non-causal here:
-          if (pendingCount == flushAt+1) {
-            for(int i=0;i<flushAt;i++) {
-              out.writeVInt(buffer[i]);
+      boolean success = false;
+      try {
+        out.writeInt(baseBlockSize);
+        VariableIntBlockIndexOutput ret = new VariableIntBlockIndexOutput(out, 2*baseBlockSize) {
+          int pendingCount;
+          final int[] buffer = new int[2+2*baseBlockSize];
+          
+          @Override
+          protected int add(int value) throws IOException {
+            assert value >= 0;
+            buffer[pendingCount++] = value;
+            // silly variable block length int encoder: if
+            // first value <= 3, we write N vints at once;
+            // else, 2*N
+            final int flushAt = buffer[0] <= 3 ? baseBlockSize : 2*baseBlockSize;
+            
+            // intentionally be non-causal here:
+            if (pendingCount == flushAt+1) {
+              for(int i=0;i<flushAt;i++) {
+                out.writeVInt(buffer[i]);
+              }
+              buffer[0] = buffer[flushAt];
+              pendingCount = 1;
+              return flushAt;
+            } else {
+              return 0;
             }
-            buffer[0] = buffer[flushAt];
-            pendingCount = 1;
-            return flushAt;
-          } else {
-            return 0;
           }
+        };
+        success = true;
+        return ret;
+      } finally {
+        if (!success) {
+          IOUtils.closeSafely(true, out);
         }
-      };
+      }
     }
   }
 
Index: lucene/src/test-framework/org/apache/lucene/index/codecs/mockrandom/MockRandomCodec.java
--- lucene/src/test-framework/org/apache/lucene/index/codecs/mockrandom/MockRandomCodec.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/index/codecs/mockrandom/MockRandomCodec.java	Sat May 28 12:36:07 2011 -0400
@@ -136,8 +136,11 @@
 
     final String seedFileName = IndexFileNames.segmentFileName(state.segmentName, state.codecId, SEED_EXT);
     final IndexOutput out = state.directory.createOutput(seedFileName);
-    out.writeLong(seed);
-    out.close();
+    try {
+      out.writeLong(seed);
+    } finally {
+      out.close();
+    }
 
     final Random random = new Random(seed);
     
Index: lucene/src/test-framework/org/apache/lucene/index/codecs/mocksep/MockSingleIntIndexOutput.java
--- lucene/src/test-framework/org/apache/lucene/index/codecs/mocksep/MockSingleIntIndexOutput.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/index/codecs/mocksep/MockSingleIntIndexOutput.java	Sat May 28 12:36:07 2011 -0400
@@ -20,6 +20,7 @@
 import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.store.Directory;
 import org.apache.lucene.util.CodecUtil;
+import org.apache.lucene.util.IOUtils;
 import org.apache.lucene.index.codecs.sep.IntIndexOutput;
 import java.io.IOException;
 
@@ -36,7 +37,15 @@
 
   public MockSingleIntIndexOutput(Directory dir, String fileName) throws IOException {
     out = dir.createOutput(fileName);
-    CodecUtil.writeHeader(out, CODEC, VERSION_CURRENT);
+    boolean success = false;
+    try {
+      CodecUtil.writeHeader(out, CODEC, VERSION_CURRENT);
+      success = true;
+    } finally {
+      if (!success) {
+        IOUtils.closeSafely(true, out);
+      }
+    }
   }
 
   /** Write an int to the primary file */
Index: lucene/src/test-framework/org/apache/lucene/store/MockDirectoryWrapper.java
--- lucene/src/test-framework/org/apache/lucene/store/MockDirectoryWrapper.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/store/MockDirectoryWrapper.java	Sat May 28 12:36:07 2011 -0400
@@ -68,24 +68,24 @@
   boolean trackDiskUsage = false;
   private Set<String> unSyncedFiles;
   private Set<String> createdFiles;
-  Set<String> openFilesForWrite = new HashSet<String>();
+  private Set<String> openFilesForWrite = new HashSet<String>();
   volatile boolean crashed;
   private ThrottledIndexOutput throttledOutput;
   private Throttling throttling = Throttling.SOMETIMES;
 
   // use this for tracking files for crash.
   // additionally: provides debugging information in case you leave one open
-  Map<Closeable,Exception> openFileHandles = Collections.synchronizedMap(new IdentityHashMap<Closeable,Exception>());
+  private Map<Closeable,Exception> openFileHandles = Collections.synchronizedMap(new IdentityHashMap<Closeable,Exception>());
 
   // NOTE: we cannot initialize the Map here due to the
   // order in which our constructor actually does this
   // member initialization vs when it calls super.  It seems
   // like super is called, then our members are initialized:
-  Map<String,Integer> openFiles;
+  private Map<String,Integer> openFiles;
 
   // Only tracked if noDeleteOpenFile is true: if an attempt
   // is made to delete an open file, we enroll it here.
-  Set<String> openFilesDeleted;
+  private Set<String> openFilesDeleted;
 
   private synchronized void init() {
     if (openFiles == null) {
@@ -127,7 +127,7 @@
     SOMETIMES,
     /** never throttle output */
     NEVER
-  };
+  }
   
   public void setThrottling(Throttling throttling) {
     this.throttling = throttling;
@@ -362,9 +362,10 @@
         ramdir.fileMap.put(name, file);
       }
     }
+    
     //System.out.println(Thread.currentThread().getName() + ": MDW: create " + name);
     IndexOutput io = new MockIndexOutputWrapper(this, delegate.createOutput(name), name);
-    openFileHandles.put(io, new RuntimeException("unclosed IndexOutput"));
+    addFileHandle(io, name, false);
     openFilesForWrite.add(name);
     
     // throttling REALLY slows down tests, so don't do it very often for SOMETIMES.
@@ -379,6 +380,18 @@
     }
   }
 
+  private void addFileHandle(Closeable c, String name, boolean input) {
+    Integer v = openFiles.get(name);
+    if (v != null) {
+      v = Integer.valueOf(v.intValue()+1);
+      openFiles.put(name, v);
+    } else {
+      openFiles.put(name, Integer.valueOf(1));
+    }
+    
+    openFileHandles.put(c, new RuntimeException("unclosed Index" + (input ? "Input" : "Output") + ": " + name));
+  }
+  
   @Override
   public synchronized IndexInput openInput(String name) throws IOException {
     maybeYield();
@@ -391,16 +404,8 @@
       throw fillOpenTrace(new IOException("MockDirectoryWrapper: file \"" + name + "\" is still open for writing"), name, false);
     }
 
-    if (openFiles.containsKey(name)) {
-      Integer v =  openFiles.get(name);
-      v = Integer.valueOf(v.intValue()+1);
-      openFiles.put(name, v);
-    } else {
-      openFiles.put(name, Integer.valueOf(1));
-    }
-
     IndexInput ii = new MockIndexInputWrapper(this, name, delegate.openInput(name));
-    openFileHandles.put(ii, new RuntimeException("unclosed IndexInput"));
+    addFileHandle(ii, name, true);
     return ii;
   }
 
@@ -465,6 +470,31 @@
     delegate.close();
   }
 
+  private synchronized void removeOpenFile(Closeable c, String name) {
+    Integer v = openFiles.get(name);
+    // Could be null when crash() was called
+    if (v != null) {
+      if (v.intValue() == 1) {
+        openFiles.remove(name);
+        openFilesDeleted.remove(name);
+      } else {
+        v = Integer.valueOf(v.intValue()-1);
+        openFiles.put(name, v);
+      }
+    }
+
+    openFileHandles.remove(c);
+  }
+  
+  public synchronized void removeIndexOutput(IndexOutput out, String name) {
+    openFilesForWrite.remove(name);
+    removeOpenFile(out, name);
+  }
+  
+  public synchronized void removeIndexInput(IndexInput in, String name) {
+    removeOpenFile(in, name);
+  }
+  
   private CodecProvider codecProvider;
 
   // We pass this CodecProvider to checkIndex when dir is closed...
Index: lucene/src/test-framework/org/apache/lucene/store/MockIndexInputWrapper.java
--- lucene/src/test-framework/org/apache/lucene/store/MockIndexInputWrapper.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/store/MockIndexInputWrapper.java	Sat May 28 12:36:07 2011 -0400
@@ -31,8 +31,7 @@
   private IndexInput delegate;
   private boolean isClone;
 
-  /** Construct an empty output buffer. 
-   * @throws IOException */
+  /** Construct an empty output buffer. */
   public MockIndexInputWrapper(MockDirectoryWrapper dir, String name, IndexInput delegate) {
     this.name = name;
     this.dir = dir;
@@ -46,20 +45,7 @@
     // remove the conditional check so we also track that
     // all clones get closed:
     if (!isClone) {
-      synchronized(dir) {
-        Integer v = dir.openFiles.get(name);
-        // Could be null when MockRAMDirectory.crash() was called
-        if (v != null) {
-          if (v.intValue() == 1) {
-            dir.openFiles.remove(name);
-            dir.openFilesDeleted.remove(name);
-          } else {
-            v = Integer.valueOf(v.intValue()-1);
-            dir.openFiles.put(name, v);
-          }
-        }
-        dir.openFileHandles.remove(this);
-      }
+      dir.removeIndexInput(this, name);
     }
   }
 
Index: lucene/src/test-framework/org/apache/lucene/store/MockIndexOutputWrapper.java
--- lucene/src/test-framework/org/apache/lucene/store/MockIndexOutputWrapper.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/store/MockIndexOutputWrapper.java	Sat May 28 12:36:07 2011 -0400
@@ -57,10 +57,7 @@
           dir.maxUsedSize = size;
         }
       }
-      synchronized(dir) {
-        dir.openFileHandles.remove(this);
-        dir.openFilesForWrite.remove(name);
-      }
+      dir.removeIndexOutput(this, name);
     }
   }
 
Index: lucene/src/test-framework/org/apache/lucene/util/ThrottledIndexOutput.java
--- lucene/src/test-framework/org/apache/lucene/util/ThrottledIndexOutput.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test-framework/org/apache/lucene/util/ThrottledIndexOutput.java	Sat May 28 12:36:07 2011 -0400
@@ -73,9 +73,11 @@
 
   @Override
   public void close() throws IOException {
+    try {
     sleep(closeDelayMillis + getDelay(true));
+    } finally {
     delegate.close();
-
+    }
   }
 
   @Override
Index: lucene/src/test/org/apache/lucene/index/TestIndexWriter.java
--- lucene/src/test/org/apache/lucene/index/TestIndexWriter.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test/org/apache/lucene/index/TestIndexWriter.java	Sat May 28 12:36:07 2011 -0400
@@ -2123,6 +2123,10 @@
             allowInterrupt = true;
           }
         } catch (ThreadInterruptedException re) {
+          if (VERBOSE) {
+            System.out.println("TEST: got interrupt");
+            re.printStackTrace(System.out);
+          }
           Throwable e = re.getCause();
           assertTrue(e instanceof InterruptedException);
           if (finish) {
Index: lucene/src/test/org/apache/lucene/index/TestIndexWriterDelete.java
--- lucene/src/test/org/apache/lucene/index/TestIndexWriterDelete.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test/org/apache/lucene/index/TestIndexWriterDelete.java	Sat May 28 12:36:07 2011 -0400
@@ -833,6 +833,10 @@
       try {
         modifier.addDocument(doc);
       } catch (IOException io) {
+        if (VERBOSE) {
+          System.out.println("TEST: got expected exc:");
+          io.printStackTrace(System.out);
+        }
         break;
       }
     }
Index: lucene/src/test/org/apache/lucene/index/TestIndexWriterExceptions.java
--- lucene/src/test/org/apache/lucene/index/TestIndexWriterExceptions.java	Sat May 28 08:38:45 2011 -0400
+++ lucene/src/test/org/apache/lucene/index/TestIndexWriterExceptions.java	Sat May 28 12:36:07 2011 -0400
@@ -919,7 +919,7 @@
       assertTrue(failure.failOnCommit && failure.failOnDeleteFile);
       w.rollback();
       assertFalse(dir.fileExists("1.fnx"));
-      // FIXME: on windows, this often fails! assertEquals(0, dir.listAll().length);
+      assertEquals(0, dir.listAll().length);
       dir.close();
     }
   }
Index: modules/suggest/src/java/org/apache/lucene/search/suggest/fst/FSTLookup.java
--- modules/suggest/src/java/org/apache/lucene/search/suggest/fst/FSTLookup.java	Sat May 28 08:38:45 2011 -0400
+++ modules/suggest/src/java/org/apache/lucene/search/suggest/fst/FSTLookup.java	Sat May 28 12:36:07 2011 -0400
@@ -510,7 +510,7 @@
       this.automaton = new FST<Object>(new InputStreamDataInput(is), NoOutputs.getSingleton());
       cacheRootArcs();
     } finally {
-      IOUtils.closeSafely(is);
+      IOUtils.closeSafely(false, is);
     }
     return true;
   }
@@ -532,7 +532,7 @@
     try {
       this.automaton.save(new OutputStreamDataOutput(os));
     } finally {
-      IOUtils.closeSafely(os);
+      IOUtils.closeSafely(false, os);
     }
 
     return true;