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java.nio.channels.ClosedChannelException: null at[na:1.8.0] at[na:1.8.0] at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup([zookeeper-3.4.3.jar:3.4.3-1240972] at org.apache.zookeeper.ClientCnxn$SendThread.cleanup([zookeeper-3.4.3.jar:3.4.3-1240972] at org.apache.zookeeper.ClientCnxn$[zookeeper-3.4.3.jar:3.4.3-1240972]