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java.lang.NullPointerException at com.fasterxml.jackson.core.JsonFactory.createParser(JsonFactory.java:822) at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:896) at org.springframework.xd.dirt.stream.zookeeper.ZooKeeperStreamDefinitionRepository.findOne(ZooKeeperStreamDefinitionRepository.java:157) at org.springframework.xd.dirt.stream.zookeeper.ZooKeeperStreamDefinitionRepository.findOne(ZooKeeperStreamDefinitionRepository.java:56) at org.springframework.xd.dirt.stream.dsl.StreamConfigParser.lookupStream(StreamConfigParser.java:654) at org.springframework.xd.dirt.stream.dsl.ChannelNode.resolve(ChannelNode.java:144) at org.springframework.xd.dirt.stream.dsl.SourceChannelNode.resolve(SourceChannelNode.java:54) at org.springframework.xd.dirt.stream.dsl.StreamNode.resolve(StreamNode.java:125) at org.springframework.xd.dirt.stream.dsl.StreamConfigParser.parse(StreamConfigParser.java:110) at org.springframework.xd.dirt.stream.XDStreamParser.parse(XDStreamParser.java:121) at org.springframework.xd.dirt.stream.StreamFactory.createStream(StreamFactory.java:84) at org.springframework.xd.dirt.server.admin.deployment.zk.DeploymentLoader.loadStream(DeploymentLoader.java:101) at org.springframework.xd.dirt.server.admin.deployment.zk.DefaultDeploymentStateRecalculator.recalculateStreamStates(DefaultDeploymentStateRecalculator.java:96) at org.springframework.xd.dirt.server.admin.deployment.zk.DefaultDeploymentStateRecalculator.onSupervisorElected(DefaultDeploymentStateRecalculator.java:182) at org.springframework.xd.dirt.server.admin.deployment.zk.DeploymentSupervisor$LeaderListener.takeLeadership(DeploymentSupervisor.java:468) at org.apache.curator.framework.recipes.leader.LeaderSelector$WrappedListener.takeLeadership(LeaderSelector.java:536) at org.apache.curator.framework.recipes.leader.LeaderSelector.doWork(LeaderSelector.java:398) at org.apache.curator.framework.recipes.leader.LeaderSelector.doWorkLoop(LeaderSelector.java:443) at org.apache.curator.framework.recipes.leader.LeaderSelector.access$100(LeaderSelector.java:63) at org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:244) at org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:238) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745)