java.lang.OutOfMemoryError: GC overhead limit exceeded
   at java.util.HashMap.createEntry(HashMap.java:897)
   at java.util.HashMap.addEntry(HashMap.java:884)
   at java.util.HashMap.put(HashMap.java:505)
   at java.util.HashSet.add(HashSet.java:217)
   at java.util.AbstractCollection.addAll(AbstractCollection.java:342)
   at java.util.HashSet.<init>(HashSet.java:117)
   at org.netbeans.modules.sampler.SamplesOutputStream.writeSample(SamplesOutputStream.java:152)
   at org.netbeans.modules.sampler.Sampler$1.run(Sampler.java:193)
   at java.util.TimerThread.mainLoop(TimerThread.java:555)
   at java.util.TimerThread.run(TimerThread.java:505)