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From "Marshall Schor (JIRA)" <...@uima.apache.org>
Subject [jira] Commented: (UIMA-1789) deployAsyncService script should use -XX:+HeapDumpOnOutOfMemoryError
Date Wed, 02 Jun 2010 00:21:40 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12874331#action_12874331
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Marshall Schor commented on UIMA-1789:
--------------------------------------

Another potential issue is that this parameter is one of the XX ones, which means it is likely
not standard for all JVMs.  For instance, the IBM JVM doesn't have this option - see http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp
and search on -XX.

Another danger for users is that they would not expect this to be enabled by default.  This
means that they could become puzzled by very long termination events (in the case they were
using a 64-bit OS and running with very large heaps), or run out of disk space, etc.  

My opinion is that the right diagnosis strategy for an OutOfMemory error is probably situation
dependent, and only some of them (on some JVMs) would warrant a heap dump.  So I think this
should be left to developers to specify explicitly (if their JVM supports it), and not enabled
by default.



> deployAsyncService script should use -XX:+HeapDumpOnOutOfMemoryError
> --------------------------------------------------------------------
>
>                 Key: UIMA-1789
>                 URL: https://issues.apache.org/jira/browse/UIMA-1789
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Async Scaleout
>            Reporter: Jörn Kottmann
>            Priority: Minor
>
> In case a user application needs to much memory an OuOfMemoryError stops the UIMA AS
service. It would
> be nice if the VM would just dump the memory for further analysis and stops afterwards.
> For a sun vm this can be achieved with this command line option:
> -XX:+HeapDumpOnOutOfMemoryError
> Can this be done in our script, does it also work with other VMs ?

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