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https://issues.apache.org/jira/browse/HDFS-10977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15563883#comment-15563883
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Zhe Zhang commented on HDFS-10977:
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Thanks [~senthilec566] for reporting the similar issue. Yes it's possible that
decomm nodes were causing the infinite delay, in which case {{-include}} is a
good workaround. I'll try that in our cluster.
But in general, I think we still should add the timeout logic. E.g. the RPC
request could encounter issues on the network layer.
> Balancer should query NameNode with a timeout
> ---------------------------------------------
>
> Key: HDFS-10977
> URL: https://issues.apache.org/jira/browse/HDFS-10977
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Reporter: Zhe Zhang
> Assignee: Zhe Zhang
> Attachments: Gmail - HDFS Balancer Stuck after 10 Minz.pdf,
> HDFS-10977-reproduce.patch
>
>
> We found a case where {{Dispatcher}} was stuck at {{getBlockList}} *forever*
> (well, several hours when we found it).
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