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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4856) Add thread dump information when derby crash
Date Tue, 19 Oct 2010 18:36:28 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12922656#action_12922656
] 

Kathey Marsden commented on DERBY-4856:
---------------------------------------

I recently had to do a programatic dump of information on a Sun JVM and found this:
http://forums.oracle.com/forums/thread.jspa?threadID=1237584&tstart=15

The file did not have the system properties or shell environment.   I printed the system properties
as below, but between the two seemed to still be missing a of information, like the shell
environment and the command line,

	System.out.println("\n\n------ Java System Properties -----");
	Properties sprops = System.getProperties();
	Set listem;
	String str;

	listem = sprops.keySet();
	Iterator itr = listem.iterator();	

	System.out.println("props test");
	while (itr.hasNext())
	{
		str = (String) itr.next();
		System.out.println("key: " + str +"\t;value: " + sprops.getProperty(str));
	}

	System.out.println("---- end System Properties output ----\n\n");


> 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
>
> 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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