[ http://issues.apache.org/jira/browse/DERBY-1219?page=all ]
Bryan Pendleton reassigned DERBY-1219:
--------------------------------------
Assign To: (was: Bryan Pendleton)
Well, I ran a lot of experiments, but I don't have anything conclusive to
offer. I believe that:
- the issue is intricately linked to the handling of threads and sessions
during restart
- the hangs are because closed threads are given sessions to run, but then
abandon
those sessions without running them when they discover they've been closed
- the interrupt() call makes things better, but does not totally fix the
problem. I can still
reproduce the problem on my RedHat Linux/ Sun JDK 1.4.2 environment.
- but my various attempts to try to improve on the interrupt() fix with
additional changes,
only made things worse.
Unfortunately, I'm not going to have much more time to work on this right away,
so I'm
unassigning myself in the hopes that somebody else can work on it.
> jdbcapi/checkDataSource.java and jdbcapi/checkDataSource30.java hang
> intermittently with client
> -----------------------------------------------------------------------------------------------
>
> Key: DERBY-1219
> URL: http://issues.apache.org/jira/browse/DERBY-1219
> Project: Derby
> Type: Test
> Components: Network Server, Network Client
> Versions: 10.2.0.0
> Environment: More often on jdk 1.5 or jdk 1.6 but hangs on jdk 1.4.2 as well
> Reporter: Kathey Marsden
> Priority: Minor
> Attachments: client_stack_trace_050306.txt, drda_traces_050206.zip,
> interrupt.diff, no-sessions-for-closed-threads.diff,
> server_stack_trace_050306.txt, skipThreads.diff, testfiles_afterhang.zip,
> traces_on_hang.txt
>
> The tests checkDataSource.java and checkDataSource30.java
> hang intermittently especially with jdk 1.5.
> Attached is the test run output and traces when the server is started
> separately.
> 1) Enable checkDataSource30.java by taking it out of
> functionTests/suites/DerbyNetClient.exclude.
> 2) Run the test with client.
> java -Dij.exceptionTrace=true -Dkeepfiles=true -Dframework=DerbyNetClient
> org.apache.derbyTesting.functionTests.harness.RunTest
> jdbcapi/checkDataSource30.java
> Attachements:
> testfiles_after_hang.zip - Test directory.
> traces_on_hang.txt - Server side traces obtained by starting the server
> separately before running the test.
> I wish I had time to work on this right now as I would really like to see
> this valuable test in the suite, but hopefully someone else will pick it up.
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