embedded/in-memory: SQLNonTransientConnectionException: No current connection   
due to invalid page format
----------------------------------------------------------------------------------------------------------

                 Key: DERBY-5098
                 URL: https://issues.apache.org/jira/browse/DERBY-5098
             Project: Derby
          Issue Type: Bug
    Affects Versions: 10.7.1.1, 10.6.1.0
         Environment: OS: windows 2008 R2 x64, AIX 7.1, possibly other
JVM: SUN/Oracle 1.6.0_24 server x64, IBM J9 Java5 
vm2.3.sr12.j9vmap6423-20100630, possibly others
            Reporter: Christian Deutsch


Hi

In my case I am inserting many many rows in a in memory derby DB. After a while 
(a few minutes) I get a "SQLNonTransientConnectionException: No current 
connection" and the derby.log (see attachment) contains a complaint about an 
invalid page format with a dump of the page in question (which is completely 
zeros). The derby.log also contains another entry before the error (usually the 
same time stamp as the error): Cleanup action starting
Maybe this is related to the error.
Please find attached a test case to reproduce the issue. Just give it enough 
memory (-Xmx4g). It will insert a lot of rows to an in-memory derby DB with 
several threads over several connections. In case you want to run only one 
thread with one connection you might want to set these properties:
 -DuseSingleConnectionOnly=true -DuseSynchronousCommit=true 
-DnumberOfAsyncThreadsPerGenerator=1 -DnumberOfGeneratorThreads=1 
-DnubmerOfRowsPerThread=100000000 

Thank you very much
Christian

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