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https://issues.apache.org/jira/browse/MAPREDUCE-2749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096068#comment-13096068
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Thomas Graves commented on MAPREDUCE-2749:
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Manually tested with and without security. Verified jobs worked in both cases.
Test procedure for the error case is the same as steps to reproduce above, now
however the NM will NOT show up on RM node webui if nm doesn't start properly.
> [MR-279] NM registers with RM even before it starts various servers
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-2749
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2749
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Thomas Graves
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-2749-v2.patch, MAPREDUCE-2749.patch
>
>
> In case NM eventually fails to start the ContainerManager server because of
> say a port clash, RM will have to wait for expiry to detect the NM crash.
> It is desirable to make NM register with RM only after it can start all of
> its components successfully.
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