Re: [rvm-research] Runtime Exception when running JMX

Hi,

On 16.06.2018 03:28, Khaled Z Mahmoud wrote:
> *I get the below exception:*
> Unexpected exception thrown in timer thread: java.lang.IllegalArgumentException: Maximum value of 0 is below 42733568, the amount committed.
> java.lang.IllegalArgumentException: Maximum value of 0 is below 42733568, the amount committed.
>    at java.lang.management.MemoryUsage.<init>(MemoryUsage.java:141)
>    at org.jikesrvm.mm.mminterface.JMXSupport.getUsage(JMXSupport.java:159)
>    at gnu.java.lang.management.VMMemoryMXBeanImpl.getUsage(VMMemoryMXBeanImpl.java:79)
>    at gnu.java.lang.management.VMMemoryMXBeanImpl.getHeapMemoryUsage(VMMemoryMXBeanImpl.java:28)
>    at gnu.java.lang.management.MemoryMXBeanImpl.getHeapMemoryUsage(MemoryMXBeanImpl.java:149)
>    at org.jikesrvm.scheduler.TimerThread.run(TimerThread.java:97)
> 
> Any ideas ??

this was a bug in the Jikes RVM JMX implementation. It didn't handle discontiguous spaces correctly. I've changed the implementation to set the maximum value to undefined when discontiguous spaces are used. The git commit id of the commit with the fix is c065b7379b1db7c15e75b452b634ee0199ff7ce5 .


Kind regards,

Erik Brangs


> 
> -- 
> Regards,
> Khaled Mahmoud
> 
> 
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