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Date: Wed, 24 Jun 2009 10:34:07 -0700 (PDT)
From: "Ari Rabkin (JIRA)" <jira@apache.org>
To: chukwa-dev@hadoop.apache.org
Subject: [jira] Commented: (CHUKWA-330) controller should not create
 duplicates for adaptors with offsets
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    [ https://issues.apache.org/jira/browse/CHUKWA-330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723650#action_12723650 ] 

Ari Rabkin commented on CHUKWA-330:
-----------------------------------

Good catch.  How about org.apache.hadoop.chukwa.util.AdaptorNamingUtils?

> controller should not create duplicates for adaptors with offsets
> -----------------------------------------------------------------
>
>                 Key: CHUKWA-330
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-330
>             Project: Hadoop Chukwa
>          Issue Type: Bug
>          Components: input tools
>            Reporter: Ari Rabkin
>            Assignee: Ari Rabkin
>            Priority: Blocker
>         Attachments: CHUKWA-330.patch
>
>   Original Estimate: 1.5h
>  Remaining Estimate: 1.5h
>
> The offset-of-first-byte param to FileTailingAdaptor is hashed into the default adaptor name.  This changes the semantics of adaptor uniqueness, and broke metrics and the log4jappender.
> Proposed fix:
>   Add a new "addByName()" method to ChukwaAgentController that lets callers specify names.  
>   Use this new method whenever finer control of adaptor uniqueness is needed.

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