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From Steve Loughran <>
Subject Re: How to dump heap on OutOfMemoryError from ant
Date Wed, 18 Oct 2006 22:20:57 GMT
Milan Kubec wrote:
> Hello,
> I want ant to generate heap dump when OutOfMemoryError happens during 
> the build to find the problem in the task. I tried adding following 
> switches to .antrc file: -XX:+HeapDumpOnOutOfMemoryError 
> -XX:HeapDumpPath=e:\ant.hprof
> But it doesn't seem to get to the correct process, in other words - 
> nothing happens. Is there some other way to generate heap dump from ant. 
> I'm using Ant 1.6.5 on JDK 1.5.0_09.

If the problem is in Ant's own process, set the ANT_OPTS env variable to 
the options.

If it is in some forked java process (like javac), you need to set the 
options inside ant by whatever element the task offers to set JVM 
options, usually <jvmargs>

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