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https://issues.apache.org/jira/browse/HADOOP-4659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648600#action_12648600
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Steve Loughran commented on HADOOP-4659:
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The two patches in here do slightly different things, and need to be merged.
-my one left the class of an exception alone (and, for ConnectExceptions,
inserted the host and port into the text, as with HADOOP-3844.
-Hairong's stopped some exceptions getting swallowed during setupIOstreams
I think both are needed, so will apply Hairong's to my code and generate a
combined patch.
I can test this by deploying an orphan task tracker, but in that situation,
once the code is fixed, the TaskTracker will spin forever. If a timeout on the
retries could be provided, we could add a test that verified the tracker ran
for 20-30s before timing out and relaying the exception. In production you'd
set the timeout to a number of hours or forever, obviously.
> Root cause of connection failure is being lost to code that uses it for
> delaying startup
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-4659
> URL: https://issues.apache.org/jira/browse/HADOOP-4659
> Project: Hadoop Core
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.18.3
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Blocker
> Fix For: 0.18.3
>
> Attachments: connectRetry.patch, hadoop-4659.patch
>
>
> ipc.Client the root cause of a connection failure is being lost as the
> exception is wrapped, hence the outside code, the one that looks for that
> root cause, isn't working as expected. The results is you can't bring up a
> task tracker before job tracker, and probably the same for a datanode before
> a namenode. The change that triggered this is not yet located, I had thought
> it was HADOOP-3844 but I no longer believe this is the case.
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