Srikanth Srungarapu created HBASE-11749:
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             Summary: Better error logging when coprocessors loading has failed.
                 Key: HBASE-11749
                 URL: https://issues.apache.org/jira/browse/HBASE-11749
             Project: HBase
          Issue Type: Improvement
          Components: Coprocessors, Usability
            Reporter: Srikanth Srungarapu
            Assignee: Srikanth Srungarapu
            Priority: Trivial


The following is the error in the log being displayed now, when the wrong 
coprocessor is specified in config file.
{code}
378:2014-08-14 15:15:41,773 ERROR [master:172.16.2.118:60000] 
coprocessor.CoprocessorHost: The coprocessor 
org.apache.hadoop.hbase.security.visibility.VisibilityControlle threw an 
unexpected exception
{code}
Instead it would be better to have more meaningful exception description like
{code}
525:2014-08-14 15:07:33,682 ERROR [master:172.16.2.118:60000] 
coprocessor.CoprocessorHost: The coprocessor 
org.apache.hadoop.hbase.security.visibility.VisibilityControlle threw 
java.lang.ClassNotFoundException: 
org.apache.hadoop.hbase.security.visibility.VisibilityControlle
{code}




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