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