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http://issues.apache.org/jira/browse/DERBY-1817?page=comments#action_12433616 ] 
            
Knut Anders Hatlen commented on DERBY-1817:
-------------------------------------------

Thank you for reviewing the patch, Bryan! I think you are right, those methods 
could be removed or made private now. I will address that in a follow-up patch. 
Committed 1817-2.diff into trunk with revision 441802. Leaving the issue open 
until the suggested clean-up of NetworkServerControlImpl has been performed.

> Race condition in network server's thread pool
> ----------------------------------------------
>
>                 Key: DERBY-1817
>                 URL: http://issues.apache.org/jira/browse/DERBY-1817
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Server
>    Affects Versions: 10.2.1.0
>            Reporter: Knut Anders Hatlen
>         Assigned To: Knut Anders Hatlen
>         Attachments: 1817-2.diff, 1817.diff, 1817.stat
>
>
> If there is a free DRDAConnThread when a client connects to the network 
> server, the session is put into a queue from which one of the free 
> DRDAConnThreads can pick it up. However, if another client connects after the 
> session was put into the queue, but before the DRDAConnThread has picked it 
> up, one might end up with more sessions in the queue than there are free 
> threads. This can lead to hangs like the ones that we currently see in many 
> of Ole's tests (for instance checkDataSource - 
> http://www.multinet.no/~solberg/public/Apache/TinderBox_Derby/testlog/SunOS-5.10_i86pc-i386/440518-derbyall_diff.txt).

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