[infinispan-issues] [JBoss JIRA] (ISPN-2443) DistributedTaskPart get(timeout, TimeUnit) throws ClassCastException in case the execution is not finished after specified time

[Anna Manukyan (JIRA)]

Anna Manukyan created ISPN-2443:
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             Summary: DistributedTaskPart get(timeout, TimeUnit) throws ClassCastException in case the execution is not finished after specified time
                 Key: ISPN-2443
                 URL: https://issues.jboss.org/browse/ISPN-2443
             Project: Infinispan
          Issue Type: Bug
          Components: Distributed Execution and Map/Reduce
            Reporter: Anna Manukyan
            Assignee: Vladimir Blagojevic


The issue appears almost every time the test is executed. 

The case is the following:
1. Callable<Integer> is submitted to DistributedExecutorService for execution; 
   The callable body consists of simple Thread.sleep(i) which makes the callable to sleep for specific period of time.

2. Result is taken with get(long timeout, TimeUnit unit) method;
   The timeout is given so that, it is much more shorter than the sleeping time of the callable. But sometimes it happens, that the get(timeout, unit) waits till the end. I guess this happens due to priority of threads.

3. In case of expected execution flow, i.e. if the method execution takes longer than the specified timeout, the following exception is thrown:

java.lang.ClassCastException: java.lang.Integer cannot be cast to java.util.Map
	at org.infinispan.distexec.DefaultExecutorService$DistributedTaskPart.retrieveResult(DefaultExecutorService.java:882)
	at org.infinispan.distexec.DefaultExecutorService$DistributedTaskPart.get(DefaultExecutorService.java:818)
	at org.infinispan.distexec.DistributedExecutorTest.testSleepingCallableWithTimeoutOption(DistributedExecutorTest.java:336)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:74)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:673)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:846)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1170)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
	at org.testng.TestRunner.runWorkers(TestRunner.java:1147)
	at org.testng.TestRunner.privateRun(TestRunner.java:749)
	at org.testng.TestRunner.run(TestRunner.java:600)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:317)
	at org.testng.SuiteRunner.access$000(SuiteRunner.java:34)
	at org.testng.SuiteRunner$SuiteWorker.run(SuiteRunner.java:351)
	at org.testng.internal.thread.ThreadUtil$CountDownLatchedRunnable.run(ThreadUtil.java:147)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)

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