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Posted to derby-dev@db.apache.org by "Kristian Waagan (JIRA)" <ji...@apache.org> on 2010/11/02 14:54:25 UTC
[jira] Updated: (DERBY-4849) Re-compilation may cause duplicate
entries in the XPLAIN table
[ https://issues.apache.org/jira/browse/DERBY-4849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kristian Waagan updated DERBY-4849:
-----------------------------------
Fix Version/s: 10.7.1.0
I logged DERBY-4881 for the deadlock issue. Waiting for confirmation that the fix worked before backporting.
> Re-compilation may cause duplicate entries in the XPLAIN table
> --------------------------------------------------------------
>
> Key: DERBY-4849
> URL: https://issues.apache.org/jira/browse/DERBY-4849
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.6.2.1, 10.7.1.0
> Reporter: Kristian Waagan
> Assignee: Kristian Waagan
> Priority: Minor
> Fix For: 10.7.1.0
>
> Attachments: derby-4849-1a-narrow_fix.diff, derby-4849-2a-broad_fix.diff, derby-4849-2b-broad_fix_with_test.diff, derby-4849-2b-broad_fix_with_test.stat, derby-4849-2c-broad_fix_with_test.diff, derby-4849-xplain_duplicate_stacktrace.txt
>
>
> If happening at the right moment, a re-compilation request may cause duplicate entries in the XPLAIN statement tables.
> I have only confirmed this for the SYSXPLAIN_STATEMENTS table, and I do not know if the other XPLAIN tables are affected.
> The error is highly intermittent, and so far I have only been able to trigger it when testing the automatic index statistics update prototype.
> See the attached stack-trace for some more details.
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