Github user srdo commented on the issue:
https://github.com/apache/storm/pull/1697
I seem to be getting a few new errors when running some of our own unit
tests with this branch. The exceptions are intermittent.
```
java.lang.NullPointerException
at
org.apache.storm.utils.DisruptorQueue$FlusherPool.stop(DisruptorQueue.java:110)
at
org.apache.storm.utils.DisruptorQueue$Flusher.close(DisruptorQueue.java:293)
at
org.apache.storm.utils.DisruptorQueue.haltWithInterrupt(DisruptorQueue.java:410)
at
org.apache.storm.disruptor$halt_with_interrupt_BANG_.invoke(disruptor.clj:77)
at
org.apache.storm.daemon.executor$mk_executor$reify__4923.shutdown(executor.clj:412)
at sun.reflect.GeneratedMethodAccessor303.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
at clojure.lang.Reflector.invokeNoArgInstanceMember(Reflector.java:313)
at
org.apache.storm.daemon.worker$fn__5550$exec_fn__1372__auto__$reify__5552$shutdown_STAR___5572.invoke(worker.clj:668)
at
org.apache.storm.daemon.worker$fn__5550$exec_fn__1372__auto__$reify$reify__5598.shutdown(worker.clj:706)
at
org.apache.storm.ProcessSimulator.killProcess(ProcessSimulator.java:66)
at
org.apache.storm.ProcessSimulator.killAllProcesses(ProcessSimulator.java:79)
at
org.apache.storm.testing$kill_local_storm_cluster.invoke(testing.clj:207)
at org.apache.storm.testing4j$_withLocalCluster.invoke(testing4j.clj:93)
at org.apache.storm.Testing.withLocalCluster(Unknown Source)
```
and this kind of error
```
java.lang.IllegalStateException: Timer is not active
at org.apache.storm.timer$check_active_BANG_.invoke(timer.clj:87)
at org.apache.storm.timer$cancel_timer.invoke(timer.clj:120)
at
org.apache.storm.daemon.worker$fn__5550$exec_fn__1372__auto__$reify__5552$shutdown_STAR___5572.invoke(worker.clj:682)
at
org.apache.storm.daemon.worker$fn__5550$exec_fn__1372__auto__$reify$reify__5598.shutdown(worker.clj:706)
at
org.apache.storm.ProcessSimulator.killProcess(ProcessSimulator.java:66)
at
org.apache.storm.ProcessSimulator.killAllProcesses(ProcessSimulator.java:79)
at
org.apache.storm.testing$kill_local_storm_cluster.invoke(testing.clj:207)
at org.apache.storm.testing4j$_withLocalCluster.invoke(testing4j.clj:93)
at org.apache.storm.Testing.withLocalCluster(Unknown Source)
```
Our tests are running Storm in local mode with no time simulation. I've
tried running the same tests on 1.x-branch, and these don't seem to occur there.
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