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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2388) Give a very explicit message when we figure a big GC pause
Date Mon, 29 Mar 2010 17:09:27 GMT
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


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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