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From "Lily Wei (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4856) Add thread dump information when derby crash
Date Wed, 17 Nov 2010 04:00:14 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lily Wei updated DERBY-4856:
----------------------------

    Attachment: derby.log
                derby-4856-1a.diff

Thanks to Kathey. I am able to construct first attempt to add thread dump on insane build
for embedded server. 
I am puzzling on whether the StandardException.printStackTrace(PrintWriter s) for severity
>= ExceptionSeverity.SESSION_SEVERITY is the best place to print out thread dump or place
like ErrorStringBuilder.stackTrace is better. Personally, I think it shouldn't be that much
noise to put in StandardException.printStackTrace(PrinterWriter s) Any opinion is welcome.
Please review the code and give me your opinion. Thanks.

> 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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