Andy,

you have used two conflicting options, -XX:+UseConcMarkSweepGC and 
-XX:+UseParallelGC, in the same JAVA_OPTS. These refer to two different 
garbage collectors. For example:

$ java -XX:+UseConcMarkSweepGC -XX:+UseParallelGC
Conflicting collector combinations in option list; please refer to the 
release notes for the combinations allowed
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

If you want try try the parallel GC, remove -XX:+UseConcMarkSweepGC from 
the option list. (In fact I think the parallel collector is the default 
for your JDK for server class machines, so will be used if you specify 
no options, but it will not hurt to be explicit.)

Kind regards,
Ben.

On 15/07/14 17:09, AndyT wrote:
> This is the setting which fails:
> JAVA_OPTS="-Djava.awt.headless=true -server -Xmx512m -Xms48m
> -XX:+UseConcMarkSweepGC -XX:MaxPermSize=128M
> -XX:SoftRefLRUPolicyMSPerMB=36000 -XX:+UseParallelGC "

-- 
Ben Caradoc-Davies <[email protected]>
Software Engineer
CSIRO Mineral Resources Flagship
Australian Resources Research Centre

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