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https://issues.apache.org/jira/browse/HDFS-11384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15982410#comment-15982410
]
Zhe Zhang commented on HDFS-11384:
----------------------------------
Thanks for the update [~shv]. Now all other tests in {{TestBalancer}} pass
except for {{testBalancerRPCDelay}}:
{code}
java.util.concurrent.TimeoutException: Timed out waiting for /tmp.txt to reach
40 replicas
at
org.apache.hadoop.hdfs.DFSTestUtil.waitReplication(DFSTestUtil.java:764)
at
org.apache.hadoop.hdfs.server.balancer.TestBalancer.createFile(TestBalancer.java:306)
at
org.apache.hadoop.hdfs.server.balancer.TestBalancer.doTest(TestBalancer.java:847)
at
org.apache.hadoop.hdfs.server.balancer.TestBalancer.testBalancerRPCDelay(TestBalancer.java:2071)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
{code}
> 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
>
>
> 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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