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https://issues.apache.org/jira/browse/HDFS-4251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507514#comment-13507514
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Sanjay Radia commented on HDFS-4251:
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As observed in HDFS-4233, NN's socket connections can use up all FDs leaving
none for rolling journals or other normal files.
I could not find separate limits for regular files and tcp connections in Linux.
The rpc layer needs to limit the number of tcp connections to be a little less
than the max fds.
> NN connections can use up all fds leaving none for rolling journal files
> ------------------------------------------------------------------------
>
> Key: HDFS-4251
> URL: https://issues.apache.org/jira/browse/HDFS-4251
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Sanjay Radia
>
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