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https://issues.apache.org/jira/browse/HDFS-14969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takanobu Asanuma resolved HDFS-14969.
-------------------------------------
Resolution: Duplicate
This issue seems to be resolved by HADOOP-17116.
> Fix HDFS client unnecessary failover log printing
> -------------------------------------------------
>
> Key: HDFS-14969
> URL: https://issues.apache.org/jira/browse/HDFS-14969
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 3.1.3
> Reporter: Xudong Cao
> Assignee: Xudong Cao
> Priority: Minor
> Labels: multi-sbnn
>
> In multi-NameNodes scenario, suppose there are 3 NNs and the 3rd is ANN, and
> then a client starts rpc with the 1st NN, it will be silent when failover
> from the 1st NN to the 2nd NN, but when failover from the 2nd NN to the 3rd
> NN, it prints some unnecessary logs, in some scenarios, these logs will be
> very numerous:
> {code:java}
> 2019-11-07 11:35:41,577 INFO retry.RetryInvocationHandler:
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException):
> Operation category READ is not supported in state standby. Visit
> https://s.apache.org/sbnn-error
> at
> org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:98)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:2052)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:1459)
> ...{code}
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