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Date: Tue, 16 Nov 2010 23:08:15 -0500 (EST)
From: "Lily Wei (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-4856) Add thread dump information when
 derby crash
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    [ https://issues.apache.org/jira/browse/DERBY-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932806#action_12932806 ] 

Lily Wei commented on DERBY-4856:
---------------------------------

The changes included: 
1. Move ThreadDump.java from java/shared/org/apache/derby/shared/common/sanity to java/shard/org/apache/derby/shared/common/error
2. move dumpThreads method from AssertFailure to ExceptionUtil
3. Add printStackTrace to StandardException when severity >= ExceptionSeverity.SESSION_SEVERITY
You can find thread dump information in derby.log for corruptdb database 

Hope this is helpful.

> Add thread dump information when derby crash
> --------------------------------------------
>
>                 Key: DERBY-4856
>                 URL: https://issues.apache.org/jira/browse/DERBY-4856
>             Project: Derby
>          Issue Type: Bug
>          Components: Services
>            Reporter: Lily Wei
>            Priority: Minor
>         Attachments: corruptdb.zip, derby-4856-1a.diff, derby.log
>
>
> On system crash or session ending error, Derby should dump as much information as possible. Such as: forcing a javacore if possible or at least thread dump and system environment information. This should only occur if a running session crashes not on boot error due to fail recovery etc.
> The IBM jvm provides a way to programmatically dump a javacore. i.e. com.ibm.jvm.Dump.JavaDump() And, the SUN jvm will force a thread dump using the Unsafe class and there may be a better way. 

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