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From "Bill Graham (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CHUKWA-487) Collector left in a bad state after temprorary NN outage
Date Fri, 14 May 2010 19:54:43 GMT

     [ https://issues.apache.org/jira/browse/CHUKWA-487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bill Graham updated CHUKWA-487:
-------------------------------

    Attachment: CHUKWA-487.threaddump.txt

Just happened again, here's a thread dump. Looks like there's some lock contention on the
sequence file while trying to shut down.

> Collector left in a bad state after temprorary NN outage
> --------------------------------------------------------
>
>                 Key: CHUKWA-487
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-487
>             Project: Hadoop Chukwa
>          Issue Type: Bug
>          Components: data collection
>    Affects Versions: 0.4.0
>            Reporter: Bill Graham
>            Priority: Blocker
>         Attachments: CHUKWA-487.threaddump.txt
>
>
> When the name node returns errors to the collector, at some point the collector dies
half way. This behavior should be changed to either resemble the agents and keep trying, or
to completely shutdown. Instead, what I'm seeing is that the collector logs that it's shutting
down, and the var/pidDir/Collector.pid file gets removed, but the collector continues to run,
albeit not handling new data. Instead, this log entry is repeated ad infinitum:
> 2010-05-06 17:35:06,375 INFO Timer-1 root - stats:ServletCollector,numberHTTPConnection:0,numberchunks:0
> 2010-05-06 17:36:06,379 INFO Timer-1 root - stats:ServletCollector,numberHTTPConnection:0,numberchunks:0
> 2010-05-06 17:37:06,384 INFO Timer-1 root - stats:ServletCollector,numberHTTPConnection:0,numberchunks:0

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