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https://issues.apache.org/jira/browse/HDFS-11721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15993714#comment-15993714
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Yongjun Zhang commented on HDFS-11721:
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Hi [~thomaskwscott],
The client will not time out when the rpc time out is set, before HADOOP-12672.
While this jira fix the other issue reported there, it fixed this issue here as
a side effect.
Thanks.
> When Standby NameNode is paused using kill -SIGSTOP clients hang rather than
> moving to the active.
> --------------------------------------------------------------------------------------------------
>
> Key: HDFS-11721
> URL: https://issues.apache.org/jira/browse/HDFS-11721
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Reporter: Thomas Scott
> Priority: Minor
>
> Using kill -SIGSTOP on the standby namenode causes clients to hang rather
> than moving to the active. To reproduce:
> 1. Run kill -SIGSTOP <SBNN pid>
> 2. Run hdfs dfs -ls / (this may not show the issue as it may try the active
> namenode first. If this happens, failover the NameNodes and the issue will
> occur)
> 3. To force the issue run hdfs dfs -ls hdfs://<sbnn ip>:8020/
> This causes the client to hang with no timeout until the SBNN is resumed.
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