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HDFS-6047 TestPread NPE inside in DFSInputStream hedgedFetchBlockByteRange (stack) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1574205 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2014-03-04 21:07:03 +00:00
parent 88245b6a41
commit c0a903da22
2 changed files with 8 additions and 2 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -525,6 +525,9 @@ Release 2.4.0 - UNRELEASED
HDFS-6040. fix DFSClient issue without libhadoop.so and some other
ShortCircuitShm cleanups (cmccabe)
HDFS-6047 TestPread NPE inside in DFSInputStream hedgedFetchBlockByteRange
(stack)
BREAKDOWN OF HDFS-5698 SUBTASKS AND RELATED JIRAS
HDFS-5717. Save FSImage header in protobuf. (Haohui Mai via jing9)

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
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@ -1177,8 +1177,11 @@ implements ByteBufferReadable, CanSetDropBehind, CanSetReadahead,
// exception already handled in the call method. getFirstToComplete
// will remove the failing future from the list. nothing more to do.
}
// We got here if exception. Ignore this node on next go around.
ignored.add(chosenNode.info);
// We got here if exception. Ignore this node on next go around IFF
// we found a chosenNode to hedge read against.
if (chosenNode != null && chosenNode.info != null) {
ignored.add(chosenNode.info);
}
}
// executed if we get an error from a data node
block = getBlockAt(block.getStartOffset(), false);