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HDFS-7884. Fix NullPointerException in BlockSender when the generation stamp provided by the client is larger than the one stored in the datanode. Contributed by Brahma Reddy Battula

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This commit is contained in:
Tsz-Wo Nicholas Sze 2015-03-24 13:49:17 +09:00
parent 9fae455e26
commit d7e3c3364e
2 changed files with 11 additions and 0 deletions
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4
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -1237,6 +1237,10 @@ Release 2.7.0 - UNRELEASED
HDFS-7942. NFS: support regexp grouping in nfs.exports.allowed.hosts (brandonli)
HDFS-7884. Fix NullPointerException in BlockSender when the generation stamp
provided by the client is larger than the one stored in the datanode.
(Brahma Reddy Battula via szetszwo)
BREAKDOWN OF HDFS-7584 SUBTASKS AND RELATED JIRAS
HDFS-7720. Quota by Storage Type API, tools and ClientNameNode

7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
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@ -246,6 +246,13 @@ class BlockSender implements java.io.Closeable {
if (replica.getGenerationStamp() < block.getGenerationStamp()) {
throw new IOException("Replica gen stamp < block genstamp, block="
+ block + ", replica=" + replica);
} else if (replica.getGenerationStamp() > block.getGenerationStamp()) {
if (DataNode.LOG.isDebugEnabled()) {
DataNode.LOG.debug("Bumping up the client provided"
+ " block's genstamp to latest " + replica.getGenerationStamp()
+ " for block " + block);
}
block.setGenerationStamp(replica.getGenerationStamp());
}
if (replicaVisibleLength < 0) {
throw new IOException("Replica is not readable, block="