Hi folks!
I use DescriptiveStatistics - but it seems to fail under heavy usage.
The scenario:
I use commons math to track average response time in a spring interceptor.
The DescriptiveStatistics instance is held within an object instance.
All calls to this object is synchronized - I've triple-checked that.
Some times when I call
descriptiveStatistics.getMean()
it throws:
java.lang.IllegalArgumentException: begin + length > values.length
at
org.apache.commons.math.stat.descriptive.AbstractUnivariateStatistic.test(AbstractUnivariateStatistic.java:89)
at
org.apache.commons.math.stat.descriptive.moment.Mean.evaluate(Mean.java:131)
at
org.apache.commons.math.stat.descriptive.DescriptiveStatisticsImpl.apply(DescriptiveStatisticsImpl.java:143)
at
org.apache.commons.math.stat.descriptive.DescriptiveStatistics.getMean(DescriptiveStatistics.java:95)
at
no.mypackage.spring.utils.ExecState.checkBadState(ExecState.java:89)
at
no.mypackage.spring.utils.ExecutionTimeAdvice$3.execute(ExecutionTimeAdvice.java:179)
at
org.apache.commons.collections.CollectionUtils.forAllDo(CollectionUtils.java:388)
at
no.mypackage.spring.utils.ExecutionTimeAdvice.invoke(ExecutionTimeAdvice.java:174)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy0.doSomething(Unknown Source)
at
no.mypackage.spring.utils.ExecutionTimeAdviceTest$1.run(ExecutionTimeAdviceTest.java:47)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Thread.java:479)
If I change my code so I only call getMean() when getN >= windowSize it
seems to work OK.
part II of the code add's values (through the same object which has
synchronized access) - and this fails from time to time too (!):
java.lang.ArrayIndexOutOfBoundsException at
org.apache.commons.math.util.ResizableDoubleArray.addElement(ResizableDoubleArray.java:255)
at
org.apache.commons.math.stat.descriptive.DescriptiveStatisticsImpl.addValue(DescriptiveStatisticsImpl.java:103)
at no.dnbnor.spring.utils.ExecState.addExecTime(ExecState.java:68)
at
no.mypackage.spring.utils.ExecutionTimeAdvice$4.execute(ExecutionTimeAdvice.java:203)
at
org.apache.commons.collections.CollectionUtils.forAllDo(CollectionUtils.java:388)
at
no.mypackage.spring.utils.ExecutionTimeAdvice.invoke(ExecutionTimeAdvice.java:200)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy0.doSomething(Unknown Source)
at
no.mypackage.spring.utils.ExecutionTimeAdviceTest$1.run(ExecutionTimeAdviceTest.java:47)
at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Thread.java:479)
Any pointers???
David J. M. Karlsen - +47 90 68 22 43
http://www.davidkarlsen.com
http://mp3.davidkarlsen.com
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