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From "Bill Graham (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CHUKWA-533) Improve fault-tolerance of collectors.
Date Tue, 23 Nov 2010 21:24:15 GMT

    [ https://issues.apache.org/jira/browse/CHUKWA-533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935050#action_12935050
] 

Bill Graham commented on CHUKWA-533:
------------------------------------

All tests pass except these which I suspect are failing for unrelated reasons:

build/test/TEST-org.apache.hadoop.chukwa.datacollection.TestOffsetStatsManager.txt:Tests run:
3, Failures: 1, Errors: 0, Time elapsed: 13.1 sec
build/test/TEST-org.apache.hadoop.chukwa.rest.resource.TestClientTrace.txt:Tests run: 1, Failures:
1, Errors: 0, Time elapsed: 4.201 sec
build/test/TEST-org.apache.hadoop.chukwa.rest.resource.TestUserResource.txt:Tests run: 2,
Failures: 1, Errors: 1, Time elapsed: 2.881 sec

TestHBaseWriter also fails, but that's because all tests are commented out.

I'll commit this patch shortly.

> Improve fault-tolerance of collectors.
> --------------------------------------
>
>                 Key: CHUKWA-533
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-533
>             Project: Chukwa
>          Issue Type: Improvement
>          Components: data collection
>            Reporter: Bill Graham
>            Assignee: Bill Graham
>         Attachments: CHUKWA-533-1.patch, CHUKWA-533-2.patch
>
>
> There are currently a number of ways that a collector can die, typically due to errors
on a DN or a NN that's being restarted. A collector should have some combination of retry
logic followed by failing back to the agent, but the collector process should not die.

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