[jira] Commented: (DERBY-3198) Using setQueryTimeout will leak sections

["Myrna van Lunteren (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-3198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541887 ] 

Myrna van Lunteren commented on DERBY-3198:
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I wonder if this could be related to the trouble we sometimes see with specific jvms with the setQueryTimeoutTest, such as DERBY-1848.

> Using setQueryTimeout will leak sections 
> -----------------------------------------
>
>                 Key: DERBY-3198
>                 URL: https://issues.apache.org/jira/browse/DERBY-3198
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, Network Client
>    Affects Versions: 10.3.1.4
>            Reporter: Dyre Tjeldvoll
>         Attachments: repro.diff
>
>
> The implementation of setQueryTimeout relies on NetStatementReply.writeSetSpecialRegister() which will allocate a dynamic section when called. No reference to this Section object is kept, and so Section.free() never gets called on it. Executing the same statment repeatedly with a query timeout set results in the client driver throwing an exception because the number of Sections exceeding 32000.

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