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From Sreejith S <srssreej...@gmail.com>
Subject TThreadPool produces concurrent modification exception in a multi threaded environment.
Date Fri, 25 Nov 2011 09:33:02 GMT
Hi all,

I am using thrift in a multi threaded environment.
My thrift server can handle many client requests and produce the output as
desired,but in some cases this error happens.
Is there any way to over come this error.

This is my stack trace.

2011-11-25 12:42:05 TThreadPoolServer [ERROR] Error occurred during
processing of message.
java.util.
ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:810)
    at java.util.HashMap$ValueIterator.next(HashMap.java:839)
    at
gate.annotation.ImmutableAnnotationSetImpl.<init>(ImmutableAnnotationSetImpl.java:28)
    at gate.annotation.AnnotationSetImpl.get(AnnotationSetImpl.java:272)
    at gate.annotation.AnnotationSetImpl.get(AnnotationSetImpl.java:285)
    at
gate.jape.SinglePhaseTransducer.transduce(SinglePhaseTransducer.java:232)
    at
gate.jape.MultiPhaseTransducer.transduce(MultiPhaseTransducer.java:182)
    at gate.jape.Batch.transduce(Batch.java:364)
    at gate.creole.Transducer.execute(Transducer.java:148)
    at gate.util.Benchmark.executeWithBenchmarking(Benchmark.java:299)
    at gate.creole.SerialController.runComponent(SerialController.java:222)
    at gate.creole.SerialController.executeImpl(SerialController.java:153)
    at
gate.creole.SerialAnalyserController.executeImpl(SerialAnalyserController.java:118)
    at gate.creole.AbstractController.execute(AbstractController.java:62)
    at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
    at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
    at
org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:176)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:679)

2011-11-25 12:42:06 TThreadPoolServer [ERROR] Error occurred during
processing of message.
java.lang.NullPointerException
    at
gate.creole.annotdelete.AnnotationDeletePR.execute(AnnotationDeletePR.java:162)
    at gate.util.Benchmark.executeWithBenchmarking(Benchmark.java:299)
    at gate.creole.SerialController.runComponent(SerialController.java:222)
    at gate.creole.SerialController.executeImpl(SerialController.java:153)
    at
gate.creole.SerialAnalyserController.executeImpl(SerialAnalyserController.java:118)
    at gate.creole.AbstractController.execute(AbstractController.java:62)
    at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
    at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
    at
org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:176)
    at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:679)


Thank You,


-- 


*Sreejith.S*
http://srijiths.wordpress.com/
* *http://sreejiths.emurse.com/

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