Github user Ethanlm commented on the issue:
https://github.com/apache/storm/pull/2677
There might be a bug in the code:
https://github.com/apache/storm/blob/master/storm-server/src/main/java/org/apache/storm/daemon/nimbus/Nimbus.java#L490-L497
```
if (leaderElector == null) {
leaderElector = Zookeeper.zkLeaderElector(conf, zkClient,
blobStore, topoCache, stormClusterState, getNimbusAcls(conf));
}
this.leaderElector = leaderElector;
this.blobStore.setLeaderElector(this.leaderElector);
if (topoCache == null) {
topoCache = new TopoCache(blobStore, conf);
}
```
`topoCache` initialization should happen before `leaderElector`
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