[ http://issues.apache.org/jira/browse/DERBY-1219?page=all ]
Deepa Remesh updated DERBY-1219:
--------------------------------
Attachment: client_stack_trace_050306.txt
server_stack_trace_050306.txt
I talked to Kathey about this issue on IRC and she suggested trying this test
outside the harness. I could repro it outside the harness too and I am
attaching the stack traces from the client and the server
(client_stack_trace_050306.txt, server_stack_trace_050306.txt) . From the trace
and from the debugging I did with a few print statements, I think this is what
is happening in the test:
* For getting a new connection, client sends EXCSAT and ACCSEC to the server.
Then, client waits for the response from the server for these commands. In all
the test runs, I found the hang always happens in this request from the client
sent as part of getConnection method.
* At the server, it tries to read the data from the client and does not get any
data in DDMReader.fill. So the server thinks the client has disconnected and
ends the connection thread.
* Client does not get back any response as server has ended the connection
thread. Thus the client is blocked trying to read the input stream.
I have not yet figured out the reason for this miscommunication between server
and client. I would appreciate if someone can also go through the traces and
confirm my analysis is correct.
> 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, server_stack_trace_050306.txt,
> 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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