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https://issues.apache.org/jira/browse/HDFS-11384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985898#comment-15985898
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Hudson commented on HDFS-11384:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11637 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11637/])
HDFS-11384. Balancer disperses getBlocks calls to avoid NameNode's rpc (shv:
rev 28eb2aabebd15c15a357d86e23ca407d3c85211c)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NameNodeAdapter.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* (add)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancerRPCDelay.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
> Add option for balancer to disperse getBlocks calls to avoid NameNode's
> rpc.CallQueueLength spike
> -------------------------------------------------------------------------------------------------
>
> Key: HDFS-11384
> URL: https://issues.apache.org/jira/browse/HDFS-11384
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Affects Versions: 2.7.3
> Reporter: yunjiong zhao
> Assignee: Konstantin Shvachko
> Attachments: balancer.day.png, balancer.week.png,
> HDFS-11384.001.patch, HDFS-11384.002.patch, HDFS-11384.003.patch,
> HDFS-11384.004.patch, HDFS-11384.005.patch, HDFS-11384.006.patch,
> HDFS-11384-007.patch, HDFS-11384.008.patch, HDFS-11384.009.patch,
> HDFS-11384.010.patch, HDFS-11384.011.patch, HDFS-11384-branch-2.7.011.patch,
> HDFS-11384-branch-2.8.011.patch
>
>
> When running balancer on hadoop cluster which have more than 3000 Datanodes
> will cause NameNode's rpc.CallQueueLength spike. We observed this situation
> could cause Hbase cluster failure due to RegionServer's WAL timeout.
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