[infinispan-issues] [JBoss JIRA] (ISPN-4544) BaseWordCountMapReduceTest#testCombinerForDistributedReductionWithException doesn't actually test reduce exception

[William Burns (JIRA)]

William Burns created ISPN-4544:
-----------------------------------

             Summary: BaseWordCountMapReduceTest#testCombinerForDistributedReductionWithException doesn't actually test reduce exception
                 Key: ISPN-4544
                 URL: https://issues.jboss.org/browse/ISPN-4544
             Project: Infinispan
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: Distributed Execution and Map/Reduce
    Affects Versions: 7.0.0.Alpha5
            Reporter: William Burns
            Assignee: Vladimir Blagojevic


When looking into serialization issues I found that many map reduce failures occur due to not serializable exceptions.  Looking closer it appears this was caused by the testCombinerForDistributedReductionWithException method because the anonymous inner class cannot be serialized and throws a CacheException causing the test to pass.  However if I pass in a serializable class the test fails because the Divide By Zero exception is swallowed incorrectly.

{code}
   @Test(expectedExceptions = CacheException.class)
   public void testCombinerForDistributedReductionWithException() throws Exception {
      MapReduceTask<String, String, String, Integer> task = invokeMapReduce(null);
      task.combinedWith(new DivideByZeroReducer());

      task.execute();
   }

   private static class DivideByZeroReducer implements Reducer<String, Integer>, Serializable {
      @Override
      public Integer reduce(String reducedKey, Iterator<Integer> iter) {
         //simulating exception
         int a = 4 / 0;

         return null;
      }
   }
{code}



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