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MultiTask operation returns Constants$Object$6 instead of a Map #392

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joncrlsn opened this issue Jan 4, 2013 · 1 comment

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@joncrlsn
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commented Jan 4, 2013

Hazelcast Version: 2.4

We upgraded to Hazelcast 2.4 recently. When doing a MultiTask operation we sometimes get a com.hazelcast.impl.Constants$Objects$6 back instead of a Map as expected.

Here's an example of what we are doing:

MultiTask<Map> task = new MultiTask<Map>(callable, this.hzInstance.getCluster().getMembers());
this.hzInstance.getExecutorService().execute(task);
Collection<Map> results = task.get();

for (Map m : results) { // ClassCastException here
  // Do something
}

java.lang.ClassCastException: com.hazelcast.impl.Constants$Objects$6 cannot be cast to java.util.Map

One team member suspected this is being returned instead of a TimeoutException being thrown.

Is this a new way of handling timeouts or is this possibly a bug?

Thank you in advance for your help,

  • Jon
@tevans

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commented Jan 8, 2013

FYI, we are also experiencing this issue with DistributedTask using Hazelcast 2.4.1. It appears that the task.get() method is returning OBJECT_REDO rather than the expected task execution result. Please advise ... and thanks.

-- Tom

@ghost ghost assigned mdogan Jan 8, 2013

@mdogan mdogan closed this in 1e1f8e0 Jan 8, 2013

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