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From "Bryan Duxbury (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-506) When an exception has to escape ServerCallable due to exhausted retries, show all the exceptions that lead to this situation
Date Wed, 12 Mar 2008 00:20:46 GMT
When an exception has to escape ServerCallable due to exhausted retries, show all the exceptions
that lead to this situation
----------------------------------------------------------------------------------------------------------------------------

                 Key: HBASE-506
                 URL: https://issues.apache.org/jira/browse/HBASE-506
             Project: Hadoop HBase
          Issue Type: Improvement
          Components: client
            Reporter: Bryan Duxbury
             Fix For: 0.1.0, 0.2.0


Every so often, we find ourselves trying to debug a problem that happens in HTable where we
exhaust all our retries trying to contact the region server hosting the region we want to
operate on. Oftentimes the last exception that comes out is something like WrongRegionException,
which should just never be the case. 

As a way to improve our debugging capabilities, when we decide to throw an exception out of
ServerCallable, let's show not just the last exception but all the exceptions that caused
all the retries in the first place. This will help us understand the sequence of events that
led to us running out of retries. 

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