java.lang.OutOfMemoryError: Java heap space
   at java.io.ObjectOutputStream$HandleTable.growEntries(ObjectOutputStream.java:2347)
   at java.io.ObjectOutputStream$HandleTable.assign(ObjectOutputStream.java:2276)
   at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1428)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
   at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
   at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
   at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
   at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1378)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
   at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
   at java.util.TreeMap.writeObject(TreeMap.java:2433)
   at sun.reflect.GeneratedMethodAccessor32.invoke(GeneratedMethodAccessor32.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:483)
   at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
   at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
   at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
   at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
   at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
   at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
   at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
   at org.netbeans.modules.sampler.SamplesOutputStream$Sample.writeToStream(SamplesOutputStream.java:308)
   at org.netbeans.modules.sampler.SamplesOutputStream$Sample.access$300(SamplesOutputStream.java:276)
   at org.netbeans.modules.sampler.SamplesOutputStream.close(SamplesOutputStream.java:225)
   at org.netbeans.modules.sampler.Sampler.stopSampling(Sampler.java:254)
   at org.netbeans.modules.sampler.Sampler.stopAndWriteTo(Sampler.java:220)
   at org.netbeans.core.TimableEventQueue$1R.run(TimableEventQueue.java:246)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)