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From "Ari Rabkin (JIRA)" <>
Subject [jira] Commented: (CHUKWA-415) should load adaptors from both checkpoint file and conf/initial_adaptors
Date Wed, 11 Nov 2009 01:33:28 GMT


Ari Rabkin commented on CHUKWA-415:

I don't want to rush to commit this without some operational experience.  If applies and uses
the patch (Bill?), let us know how it goes.  In addition, I will experiment with it at Berkeley.

> should load adaptors from both checkpoint file and conf/initial_adaptors
> ---------------------------------------------------------------------------------
>                 Key: CHUKWA-415
>                 URL:
>             Project: Hadoop Chukwa
>          Issue Type: Improvement
>            Reporter: Bill Graham
>            Assignee: Ari Rabkin
>         Attachments: CHUKWA-415.patch
> Currently when is run, the agent will load the adaptors found in the config/initial_adaptors
file only of the checkpoints file doesn't exist. If the checkpoint file does exist, the initial_adaptors
file is silently ignored. This is misleading and seems like a potential cause of confusion.
> Instead both files should both be checked for adaptors, first the checkpoint file, then
the initial_adaptors file. This order would ensure that the same adaptor won't lose it's checkpoint
info or get loaded twice if the agent is bounced.
> Also, the agents.log file does a good job of reporting which adaptors are registered,
but it doesn't show where they were loaded from. This information would be useful to have
if possible.

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