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From "Bryan Pendleton (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1114) derbynet/testSecMec.java fails intermittently and test exits mysteriously when server is shutdown as part of the testrun.
Date Tue, 14 Mar 2006 22:31:56 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1114?page=comments#action_12370431 ] 

Bryan Pendleton commented on DERBY-1114:
----------------------------------------

I can still reproduce the problem even with your changes to remove the switchable streams.
So that's one piece of evidence that appears to rule out the switchable streams as the cause.

Also, I tried another experiment. I modified the definition of SwitchablePrintStream in dataSourcePermissions_net.java
so that it overrode the close() method, and I gave the overridden method an empty body (that
is, I didn't call super.close()) on the theory that this would show whether somebody was calling
the close method on the streams unexpectedly. But I was still able to reproduce the problem
even with SwitchablePrintStream.close() doing nothing.

So, the good news is that I can still reproduce the failure, and I seem to be ruling things
out.

The bad news is that I'm a little short of theories as to what's going wrong.

I like Sunitha's theory that we're somehow closing the standard output stream prematurely;
I'm just not sure how to write code that tests that theory.


> derbynet/testSecMec.java fails intermittently and test exits mysteriously when server
is shutdown as part of the testrun.
> -------------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-1114
>          URL: http://issues.apache.org/jira/browse/DERBY-1114
>      Project: Derby
>         Type: Bug
>   Components: Network Server, Test
>     Versions: 10.2.0.0
>  Environment: Java Version:    1.4.2_06
> Java Vendor:     Sun Microsystems Inc.
> Java home:       /usr/local/lib/j2sdk1.4.2_06/jre
> OS name:         Linux
> OS architecture: i386
> OS version:      2.4.21-27.0.2.ELsmp
>     Reporter: Sunitha Kambhampati
>     Priority: Minor
>  Attachments: Derby1114.diff.txt
>
> The test derbynet/testSecMec.java fails intermittently in a strange way that the test
actually exits before finishing the full test. 
> This issue was noticed by Bryan when he ran derbyall with the derby-1080 fix. Some discussion
and analysis that has been done is in Derby-1080. Please read comments in DERBY-1080. Some
main links in
> http://issues.apache.org/jira/browse/DERBY-1080#action_12370260
> http://issues.apache.org/jira/browse/DERBY-1080#action_12370374
> In short: the test does some switching of System.out and System.err streams before calling
networkserver.shutdown. This code was added to this test as part of fix for derby-273.   for
some reason, the networkserver.shutdown call makes the test to exit.  One theory is that the
network server.shutdown is causing the standard out streams to close and thus the test exits.
> -- Need to investigate what is the cause for this intermittent failure and how/why  networkserver.shutdown
is closing the stream or making the test to exit prematurely.

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