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https://issues.apache.org/jira/browse/DERBY-4343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kathey Marsden updated DERBY-4343:
----------------------------------

    Priority: Minor  (was: Major)

Hi Lily,
You should specify -Dderby.drda.traceAll=true on the server startup or in 
derby.properties, not on the client invocation and then will see the trace in a 
file called Server1.trace.  Alternately, you can use the client side tracing.  
See
http://wiki.apache.org/db-derby/ProtocolDebuggingTips
for more tracing information.

Thanks Kristian for the analysis. I am changing to minor since you see no 
impact with insane builds.  The rest I will try to digest later,

> ASSERT FAILED calling setTransactionIsolation checking isolation_ == level   
> on  pooled connection
> --------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4343
>                 URL: https://issues.apache.org/jira/browse/DERBY-4343
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, Network Client
>    Affects Versions: 10.6.0.0
>            Reporter: Kathey Marsden
>            Priority: Minor
>         Attachments: TestConnReuse.java
>
>
> For DERBY-4314, I thought I would do a little testing to understand the 
> server round trips in various scenarios for pooled connections.  So I wrote 
> the small attached program ConnReuse.java and hit this assertion in client:
> Exception in thread "main" 
> org.apache.derby.shared.common.sanity.AssertFailure: ASSERT FAILED
>         at 
> org.apache.derby.shared.common.sanity.SanityManager.ASSERT(SanityManager.java:98)
>         at 
> org.apache.derby.client.am.Connection.setTransactionIsolationX(Connection.java:987)
>         at 
> org.apache.derby.client.am.Connection.setTransactionIsolation(Connection.java:915)
>         at 
> org.apache.derby.client.am.LogicalConnection.setTransactionIsolation(LogicalConnection.java:253)
>         at TestConnReuse.main(TestConnReuse.java:32)
> ---------------
> To run the program on trunk:
> java org.apache.derby.drda.NetworkServerControl start
> java TestConnReuse.
> This needs more investigation, but I thought I would go ahead and log the 
> bug.  I tried this only on  trunk.  I  have not yet
> - Tried it on the branches.
> - Tried it with Lily's DERBY-4314 patch.
> - Tried it with embedded.
> - Tried actually doing something with the prior logical connection which 
> might be related.

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