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