[HADOOP-7870] fix SequenceFile#createWriter with boolean createParent arg to respect createParent.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.1.0, 0.23.1
• Hadoop Flags: Reviewed
• Assignee: Jonathan Hsieh
• Reporter: Jonathan Hsieh
• Created: 29/Nov/11 21:39
• Updated: 02/May/13 02:29
• Resolved: 01/Dec/11 00:32

Description

After HBASE-6840, one set of calls to createNonRecursive(...) seems fishy - the new boolean createParent variable from the signature isn't used at all.

+  public static Writer
+    createWriter(FileSystem fs, Configuration conf, Path name,
+                 Class keyClass, Class valClass, int bufferSize,
+                 short replication, long blockSize, boolean createParent,
+                 CompressionType compressionType, CompressionCodec codec,
+                 Metadata metadata) throws IOException {
+    if ((codec instanceof GzipCodec) &&
+        !NativeCodeLoader.isNativeCodeLoaded() &&
+        !ZlibFactory.isNativeZlibLoaded(conf)) {
+      throw new IllegalArgumentException("SequenceFile doesn't work with " +
+                                         "GzipCodec without native-hadoop code!");
+    }
+
+    switch (compressionType) {
+    case NONE:
+      return new Writer(conf, 
+          fs.createNonRecursive(name, true, bufferSize, replication, blockSize, null),
+          keyClass, valClass, metadata).ownStream();
+    case RECORD:
+      return new RecordCompressWriter(conf, 
+          fs.createNonRecursive(name, true, bufferSize, replication, blockSize, null),
+          keyClass, valClass, codec, metadata).ownStream();
+    case BLOCK:
+      return new BlockCompressWriter(conf,
+          fs.createNonRecursive(name, true, bufferSize, replication, blockSize, null),
+          keyClass, valClass, codec, metadata).ownStream();
+    default:
+      return null;
+    }
+  } 
+

Nicolas Spiegelberg suggests changing it to

 
if (createParent) { use fs.create() } 
else { use fs.createNonRecursive(); }

Issue Links

• depends upon: HADOOP-6840 Support non-recursive create() in FileSystem & SequenceFile.Writer