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https://issues.apache.org/jira/browse/HDFS-2120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064888#comment-13064888
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Aaron T. Myers commented on HDFS-2120:
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Latest patch looks good to me. +1 pending Hudson results.
> on reconnect, DN can connect to NN even with different source versions
> ----------------------------------------------------------------------
>
> Key: HDFS-2120
> URL: https://issues.apache.org/jira/browse/HDFS-2120
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: John George
> Assignee: John George
> Attachments: HDFS-2120-2.patch, HDFS-2120-3.patch, HDFS-2120-4.patch,
> HDFS-2120.patch
>
>
> DN or NN does not check for source versions in cases when NN goes away or has
> lost connection. The only check that is done by NN is for LAYOUT_VERSION and
> DN does not check for any version mismatch.
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