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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5098) embedded/in-memory: SQLNonTransientConnectionException: No current connection due to invalid page format
Date Mon, 16 May 2011 10:12:47 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13033948#comment-13033948

Knut Anders Hatlen commented on DERBY-5098:

The changes in the patch look fine to me. +1 to commit.

Since there is a check in increaseCapacity() that's making it a no-op in the case where the
current capacity is larger than the requested capacity, maybe we could even remove the redundant
checks around the calls to increaseCapacity()? Then we'd only have to worry about overflow
at one place.

> 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:,
>         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
>            Reporter: Christian Deutsch
>            Assignee: Kristian Waagan
>         Attachments: DerbyRepro5098.java, derby-5098-1a-overflow_fixes.diff, derby-5098-1a-overflow_fixes.stat,
derby., derby.,
derby., derby.,
> 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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