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Posted to derby-dev@db.apache.org by "Kathey Marsden (JIRA)" <de...@db.apache.org> on 2006/04/09 19:12:24 UTC

[jira] Closed: (DERBY-1196) Network server closes prepared statements prematurely if exception occurs during OPNQRY and can cause "'Statement' already closed" exception on reexecution

     [ http://issues.apache.org/jira/browse/DERBY-1196?page=all ]
     
Kathey Marsden closed DERBY-1196:
---------------------------------


> Network server closes  prepared statements  prematurely if  exception occurs during OPNQRY  and can cause "'Statement' already closed" exception on reexecution
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-1196
>          URL: http://issues.apache.org/jira/browse/DERBY-1196
>      Project: Derby
>         Type: Bug

>   Components: Network Server
>     Versions: 10.2.0.0
>     Reporter: Kathey Marsden
>     Assignee: Kathey Marsden
>     Priority: Minor
>      Fix For: 10.2.0.0

>
> There is a bug in  Network Server that it closes prepared statements if
> an error occurs during execution on OPNQRY (usually PreparedStatement.execute())
> Basically the problem is this code in DRDAConnThread.java
> processCommands() which catches any exception that occurs during  OPNQRY
> and closes the prepared statement .  OPNQRY is just the statement execution and any statement level exceptions should not cause the statement to be closed.
> catch (SQLException e)
>                     {
>                         writer.clearDSSesBackToMark(writerMark);
>                         try {
>                             // Try to cleanup if we hit an error.
>                             if (ps != null)
>                                 ps.close();
>                             writeOPNQFLRM(e);
>                         }
>                         catch (SQLException pse) {}
>                         errorInChain(e);
>                     }
> There are cases in jdbcapi/setTransactionIsolation when run with JCC that trigger this case and yield a 
> 'Statement' already closed message. 
> This was the core issue with DERBY-1047 but there were problems with the DERBY-1047 Jira entry in that the description of the problem was wrong and also the issue itself no longer occurs with the fix for DERBY-1158.
> DERBY-1047 will be closed invalid and this issue will be used to  track  the fix.

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