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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-2388) Give a very explicit message when we figure a big GC pause
Date Tue, 30 Mar 2010 01:07:27 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jean-Daniel Cryans updated HBASE-2388:
--------------------------------------

    Attachment: HBASE-2388.patch

Patch that makes the message coming from Sleeper much more helpful. I also updated the entry
that the link refers to.

> Give a very explicit message when we figure a big GC pause
> ----------------------------------------------------------
>
>                 Key: HBASE-2388
>                 URL: https://issues.apache.org/jira/browse/HBASE-2388
>             Project: Hadoop HBase
>          Issue Type: Improvement
>    Affects Versions: 0.20.3
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.20.4, 0.21.0
>
>         Attachments: HBASE-2388.patch
>
>
> Our new users get confused when they see their region servers disappearing. If they are
proactive enough, they even show us with some messages like:
> {code}
> 2010-03-28 20:24:27,439 WARN org.apache.hadoop.hbase.util.Sleeper: We slept
> 79410ms, ten times longer than scheduled: 5000
> 2010-03-28 20:24:27,439 WARN org.apache.hadoop.hbase.util.Sleeper: We slept
> 78781ms, ten times longer than scheduled: 3000
> {code}
> For us it's very obvious what just happened, for our users not at all. I think we could
easily just create a very comprehensive entry about this issue in the troubleshooting page
and put a link directly into the error message.

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