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From "Mike Matrigali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-1902) Intermittent failures in predicatePushdown.sql
Date Thu, 05 Jul 2007 20:45:04 GMT

     [ https://issues.apache.org/jira/browse/DERBY-1902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mike Matrigali updated DERBY-1902:
----------------------------------

    Description: 
For the last week, there have been intermittent failures in the night test in lang/predicatePushdown.sql.
 There is a plan diff which starts as follows:

********* Diff file derbyall/derbylang/predicatePushdown.diff
*** Start: predicatePushdown jdk1.5.0_07 derbyall:derbylang 2006-09-29 00:39:36 ***
4593 del
< 			Hash Join ResultSet:
4593a4593
> 			Nested Loop Join ResultSet:

I did not find any changes that seem relevant before the first failing night test.

This test has not failed in the tinderbox test which runs on a computer with the disk cache
on.  For both computers where the failure is seen, the disk cache has been turned off.  Hence,
it may be that another plan is picked because of slower I/O.


  was:
For the last week, there have been intermittent failures in the night test in lang/predicatePushdown.sql.
 There is a plan diff which starts as follows:

********* Diff file derbyall/derbylang/predicatePushdown.diff
*** Start: predicatePushdown jdk1.5.0_07 derbyall:derbylang 2006-09-29 00:39:36 ***
4593 del
< 			Hash Join ResultSet:
4593a4593
> 			Nested Loop Join ResultSet:

I did not find any changes that seem relevant before the first failing night test.

This test has not failed in the tinderbox test which runs on a computer with the disk cache
on.  For both computers where the failure is seen, the disk cache has been turned off.  Hence,
it may be that another plan is picked because of slower I/O.


I saw this also on a 64 windows 2003 machine running the 1st 10.3 release candidate against
an 1bm 142 jvm.



> Intermittent failures in predicatePushdown.sql
> ----------------------------------------------
>
>                 Key: DERBY-1902
>                 URL: https://issues.apache.org/jira/browse/DERBY-1902
>             Project: Derby
>          Issue Type: Bug
>          Components: Regression Test Failure, SQL, Test
>    Affects Versions: 10.3.0.0
>         Environment: Seen on both Solaris 10 and Linux on 2-CPU Opteron boxes, disk cache
off
>            Reporter: Øystein Grøvlen
>         Attachments: derbylang.zip
>
>
> For the last week, there have been intermittent failures in the night test in lang/predicatePushdown.sql.
 There is a plan diff which starts as follows:
> ********* Diff file derbyall/derbylang/predicatePushdown.diff
> *** Start: predicatePushdown jdk1.5.0_07 derbyall:derbylang 2006-09-29 00:39:36 ***
> 4593 del
> < 			Hash Join ResultSet:
> 4593a4593
> > 			Nested Loop Join ResultSet:
> I did not find any changes that seem relevant before the first failing night test.
> This test has not failed in the tinderbox test which runs on a computer with the disk
cache on.  For both computers where the failure is seen, the disk cache has been turned off.
 Hence, it may be that another plan is picked because of slower I/O.

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