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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4054) Multithreaded clob update with exclusive table locking causes table growth that is not reclaimed
Date Thu, 12 Feb 2009 18:15:59 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12673019#action_12673019
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Kathey Marsden commented on DERBY-4054:
---------------------------------------

Committed a test that demonstrates the issue  with revision  743820 store/ClobReclamationTest.xtestMultiThreadedUpdateTableLocking()
Enable this test to reproduce the problem.

 

> Multithreaded clob update with exclusive table locking causes table growth that is not
reclaimed
> ------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4054
>                 URL: https://issues.apache.org/jira/browse/DERBY-4054
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.5.0.0
>            Reporter: Kathey Marsden
>
> If I do a multithreaded clob update which gets an exclusive table lock on the table,
space will not be reclaimed.  This case is similar to DERBY-4050 except that the test gets
an exclusive table lock and the growth happens whether or not the update is synchronized.
 I will add a disabled test for this to ClobReclamationTest and reference this bug.    

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