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https://issues.apache.org/jira/browse/HDFS-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901483#action_12901483
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sam rash commented on HDFS-1350:
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actually sorry, i remember your patch to do this. I think the rev I'm using
internally is older--i will check 20-append as well. This problem may not
appear in 20-append with all the latest patches.
the question still remains if there is benefit in making the datanode do a
clean shutdown on the DataXceiver threads.
> make datanodes do graceful shutdown
> -----------------------------------
>
> Key: HDFS-1350
> URL: https://issues.apache.org/jira/browse/HDFS-1350
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Reporter: sam rash
> Assignee: sam rash
>
> we found that the Datanode doesn't do a graceful shutdown and a block can be
> corrupted (data + checksum amounts off)
> we can make the DN do a graceful shutdown in case there are open files. if
> this presents a problem to a timely shutdown, we can make a it a parameter of
> how long to wait for the full graceful shutdown before just exiting
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