db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4166) improvements to the mailjdbc test
Date Tue, 09 Mar 2010 21:48:27 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12843313#action_12843313
] 

Kathey Marsden commented on DERBY-4166:
---------------------------------------

Hi Lily,

I committed to the 7 patch and think it is a good incremental improvement. I am a bit concerned
about extending the timeouts as a way to avoid the deadlocks.  I think there is still some
problem with the test logic that is causing the deadlocks and hope we can reduce the sleeps
later.  For a stress test, too much sleep time just means less testing each day in the stress
test.

I think we can close this one, but I think we should make a new issue to reduce the timeouts
and eliminate the deadlocks and also track down why the compress is needed to reclaim space
used by the test, since it seemed to be something different than DERBY-4055.


> improvements to the mailjdbc test
> ---------------------------------
>
>                 Key: DERBY-4166
>                 URL: https://issues.apache.org/jira/browse/DERBY-4166
>             Project: Derby
>          Issue Type: Improvement
>          Components: Test
>    Affects Versions: 10.6.0.0
>            Reporter: Kathey Marsden
>            Assignee: Lily Wei
>            Priority: Minor
>         Attachments: DERBY-4166-databasesize.diff, Derby-4166-samedb.diff, DERBY-4166-schemachange.diff,
DERBY-4166-schemachange2.diff, DERBY-4166-schemachange3.diff, DERBY-4166-schemachange3.diff,
DERBY-4166-schemachange4.diff, DERBY-4166-schemachange5.diff, DERBY-4166-schemachange6.diff,
DERBY-4166-schemachange7.diff, Derby-4166.diff, derby.log
>
>
> When recently working with the mailjdbc system test org.apache.derbyTesting.system.mailjdbc
on DERBY-4152 I noticed some potential improvements that might be good for the test.  We should
probably hold off on these improvements however until the root cause of DERBY-4152 is established,
however, so we don't muddy the waters with that issue by changing the test.
> 1) DbTasks.moveToFolders may throw an IllegalArgumentException.
>   There is a line:  message_id = Rn.nextInt(count - 1);
>   if count is 1 the argument to nextInt() might be 0 which is not allowed.  I hit this
once but lost the stack trace, but it is apparent that when there is only one row in the table
this can occur.
>  
> 2) Allow/implement multiple attachments per message and cleanup DbTasks.insertMail()
logic.
>    - Remove the attach_id column from INBOX to allow multiple attachments.
>    -Make the attachment insert part of the message for loop in insertMail.
>    Use getGeneratedKeys() to get the id of the inserted message.
>    When attachments are inserted, insert (1-4) attachments and give them a corresponding
attach_id from 1-4.
> This will allow for removal of the select statements used to determine id and attach_id.
 I'll file another issue for these improvements if folks agree that they are sensible.
> A detailed description of the current implementation of insertMail is described at https://issues.apache.org/jira/secure/attachment/12405685/insertMailSummary.txt
> 3) DbTasks.databaseSize calculation is wrong. It doesn't match du -sk. The method does
not recurse into subdirectories and includes the length() on directory files which is undefined
accourding to the file.length() javadoc.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message