Kill from the UI fails silently.

2016-03-30 14:02:21.613 o.a.s.t.s.AbstractNonblockingServer$FrameBuffer [ERROR] Unexpected throwable while invoking!
java.lang.NullPointerException
        at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:26)
        at org.apache.storm.daemon.nimbus$fn__3070$exec_fn__2175__auto__$reify__3099$iter__3210__3214$fn__3215.invoke(nimbus.clj:1888)
        at clojure.lang.LazySeq.sval(LazySeq.java:40)
        at clojure.lang.LazySeq.seq(LazySeq.java:49)
        at clojure.lang.RT.seq(RT.java:507)
        at clojure.core$seq__4128.invoke(core.clj:137)
        at clojure.core$dorun.invoke(core.clj:3009)
        at clojure.core$doall.invoke(core.clj:3025)
        at org.apache.storm.daemon.nimbus$fn__3070$exec_fn__2175__auto__$reify__3099.getTopologyInfoWithOpts(nimbus.clj:1885)
        at org.apache.storm.generated.Nimbus$Processor$getTopologyInfoWithOpts.getResult(Nimbus.java:3774)
        at org.apache.storm.generated.Nimbus$Processor$getTopologyInfoWithOpts.getResult(Nimbus.java:3758)
        at org.apache.storm.thrift.ProcessFunction.process(ProcessFunction.java:39)
        at org.apache.storm.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
        at org.apache.storm.security.auth.SimpleTransportPlugin$SimpleWrapProcessor.process(SimpleTransportPlugin.java:158)
        at org.apache.storm.thrift.server.AbstractNonblockingServer$FrameBuffer.invoke(AbstractNonblockingServer.java:518)
        at org.apache.storm.thrift.server.Invocation.run(Invocation.java:18)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:744)