Github user revans2 commented on the pull request:
https://github.com/apache/storm/pull/1071#issuecomment-179258530
The travis CI tests failed with
```
13881 [timer] ERROR o.a.s.d.nimbus - Error when processing event
java.lang.NullPointerException
at
org.apache.storm.cluster.Cluster.convertExecutorBeats(Cluster.java:202)
~[classes/:?]
at
org.apache.storm.cluster.StormZkClusterState.executorBeats(StormZkClusterState.java:327)
~[classes/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
~[?:1.7.0_76]
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
~[?:1.7.0_76]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.7.0_76]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_76]
at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
~[clojure-1.7.0.jar:?]
at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
~[clojure-1.7.0.jar:?]
at
org.apache.storm.daemon.nimbus$update_heartbeats_BANG_.invoke(nimbus.clj:589)
~[classes/:?]
```
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