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https://issues.apache.org/jira/browse/HDFS-9572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16704145#comment-16704145
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Tong Wu commented on HDFS-9572:
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[~cnauroth] Is it possible throw {{EOFException}} or CloseChannelException
because of any real problems, such as connetions disconnected? Thank you in
advance
> Prevent DataNode log spam if a client connects on the data transfer port but
> sends no data.
> -------------------------------------------------------------------------------------------
>
> Key: HDFS-9572
> URL: https://issues.apache.org/jira/browse/HDFS-9572
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Major
> Fix For: 2.8.0, 3.0.0-alpha1
>
> Attachments: HDFS-9572.001.patch
>
>
> Monitoring tools may choose to check liveness of the DataNode's data transfer
> port by connecting to it. The monitoring tool will close the connection
> immediately after establishment without sending any data. When this happens,
> the DataNode encounters an unexpected EOF and logs a full stack trace. This
> creates unneeded noise in the logs.
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