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From "Brett Bergquist (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-6510) Deby engine threads not making progress
Date Thu, 13 Mar 2014 19:05:43 GMT
Brett Bergquist created DERBY-6510:
--------------------------------------

             Summary: Deby engine threads not making progress
                 Key: DERBY-6510
                 URL: https://issues.apache.org/jira/browse/DERBY-6510
             Project: Derby
          Issue Type: Bug
          Components: Network Server
    Affects Versions: 10.9.1.0
         Environment: Oracle Solaris 10/9, Oracle M5000 32 CPU, 128GB memory, 8GB allocated
to Derby Network Server
            Reporter: Brett Bergquist
            Priority: Critical


We had an issue today in a production environment at a large customer site.   Basically 5
database interactions became stuck and are not progressing.   Part of the system dump performs
a stack trace every few seconds for a period of a minute on the Glassfish application server
and the Derby database engine (running in network server mode).   Also, the dump captures
the current transactions and the current lock table (ie. syscs_diag.transactions and syscs_diag.lock_table).
  We had to restart the system and in doing so, the Derby database engine would not shutdown
and had to be killed.

The stack traces of the Derby engine show 5 threads that are basically making no progress
in that at each sample, they are at the same point, waiting.

I will attach the stack traces as well as the state of the transactions and locks.   

Interesting is that the "derby.jdbc.xaTransactionTimeout =1800" is set, yet the transactions
did not timeout.  The timeout is for 30 minutes but the transactions were in process for hours.





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