Index: src/main/java/org/apache/jackrabbit/core/query/lucene/CachingIndexReader.java
===================================================================
--- src/main/java/org/apache/jackrabbit/core/query/lucene/CachingIndexReader.java	(revision 1181715)
+++ src/main/java/org/apache/jackrabbit/core/query/lucene/CachingIndexReader.java	(working copy)
@@ -23,12 +23,15 @@
 import org.apache.lucene.index.Term;
 import org.apache.lucene.index.TermDocs;
 import org.apache.lucene.index.TermEnum;
+import org.apache.lucene.store.IndexInput;
+import org.apache.lucene.store.IndexOutput;
 import org.apache.lucene.index.CorruptIndexException;
 import org.apache.jackrabbit.core.id.NodeId;
 import org.apache.commons.collections.map.LRUMap;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.BitSet;
@@ -108,6 +111,11 @@
     private final TermDocsCache termDocsCache;
 
     /**
+     * The {@link #inSegmentParents} is persisted using this filename.
+     */
+    private static final String FILE_CACHE_NAME_ARRAY = "inSegmentParents";
+    
+    /**
      * Creates a new <code>CachingIndexReader</code> based on
      * <code>delegatee</code>
      *
@@ -139,7 +147,9 @@
         }
         this.cacheInitializer = new CacheInitializer(delegatee);
         if (initCache) {
-            cacheInitializer.run();
+            if (!load()) {
+                cacheInitializer.run();
+            }
         }
         // limit cache to 1% of maxDoc(), but at least 10.
         this.docNumber2id = Collections.synchronizedMap(
@@ -322,6 +332,36 @@
         return termDocsCache.termDocs(term);
     }
 
+    public void save() throws IOException {
+        IndexOutput io = cacheInitializer.reader.directory().createOutput(
+                FILE_CACHE_NAME_ARRAY);
+
+        for (int parent : inSegmentParents) {
+            io.writeInt(parent);
+        }
+        io.close();
+    }
+
+    private boolean load() {
+        try {
+            IndexInput ii = cacheInitializer.reader.directory().openInput(
+                    FILE_CACHE_NAME_ARRAY);
+            try {
+                for (int i = 0; i < this.inSegmentParents.length; i++) {
+                    this.inSegmentParents[i] = ii.readInt();
+                }
+                return true;
+            } finally {
+                ii.close();
+            }
+        } catch (FileNotFoundException ignore) {
+        } catch (IOException ignore) {
+            log.warn("Saved state of CachingIndexReader corrupt", ignore);
+        }
+
+        return false;
+    }
+    
     /**
      * {@inheritDoc}
      */
@@ -463,6 +503,7 @@
 
                 if (docs.isEmpty()) {
                     // no more nodes to initialize
+                    save();
                     break;
                 }