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java.lang.NullPointerException: null	at java.io.ByteArrayInputStream.(ByteArrayInputStream.java:106)	at org.apache.curator.framework.imps.EnsembleTracker.processConfigData(EnsembleTracker.java:163)	at org.apache.curator.framework.imps.EnsembleTracker.access$200(EnsembleTracker.java:48)	at org.apache.curator.framework.imps.EnsembleTracker$2.processResult(EnsembleTracker.java:134)	at org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:829)	at org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:611)	at org.apache.curator.framework.imps.WatcherRemovalFacade.processBackgroundOperation(WatcherRemovalFacade.java:151)	at org.apache.curator.framework.imps.GetConfigBuilderImpl$2.processResult(GetConfigBuilderImpl.java:210)	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:619)	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:528)