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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9572) Prevent DataNode log spam if a client connects on the data transfer port but sends no data.
Date Thu, 17 Dec 2015 22:11:46 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris Nauroth updated HDFS-9572:
--------------------------------
       Resolution: Fixed
    Fix Version/s: 2.8.0
           Status: Resolved  (was: Patch Available)

I have committed this to trunk, branch-2 and branch-2.8.  Arpit, thank you for the code review.

> 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
>             Fix For: 2.8.0
>
>         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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