When an exception has to escape ServerCallable due to exhausted retries, show
all the exceptions that lead to this situation
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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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