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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4659) Root cause of connection failure is being lost to code that uses it for delaying startup
Date Tue, 18 Nov 2008 21:09:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648754#action_12648754
] 

Raghu Angadi commented on HADOOP-4659:
--------------------------------------

> [...] second call will end up seeing a closed connection and ConnectException gets delivered
to call in call.error. [...]

>From the code it does not seem to be the case (addCall() in getConnection() will be false).
I might be mistaken...

But if what you say is correct, then it is a bug that new call tries to use a closed connection
rather than creating a new one as it should. 



> 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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