I have raised the issue.
On May 17, 2013, at 7:33 PM, Vinod Kumar Vavilapalli wrote:
> It's inconvenient, but you can try DefaultMetricsSystem.shutDown(). Please see if that works and file a ticket to make LocalJobRunner automatically do this on finish.
> +Vinod Kumar Vavilapalli
> Hortonworks Inc.
> On May 17, 2013, at 7:39 AM, Subroto wrote:
>> I have an application which uses LocalJobRunner to process MR Jobs. From the heap dump of my application I can see multiple object with Name $Proxy90; happens to be created by org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(Callback).
>> Every-time a LocalJobRunner is launched it creates JobTrackerInstrumentation and QueueMetrics.
>> While creating this MetricsSystem ; it registers and adds a Callback to ArrayList which keeps on growing as the DefaultMetricsSystem is Singleton. Is it a known bug? Is there any workaround to empty this list?
>> Subroto Sanyal