HBase API 操作报错：java.nio.channels.ClosedChannelException: null

使用代码操作HBase，但是报下面错误：

15:50:38.527 [ReadOnlyZKClient-master:2181@0x04a94ee4] WARN org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - 0x04a94ee4 to master:2181 failed for get of /hbase/hbaseid, code = CONNECTIONLOSS, retries = 8
15:50:39.528 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.client.FourLetterWordMain - connecting to master 2181
15:50:41.532 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] WARN org.apache.zookeeper.ClientCnxn - Can not get the principle name from server master
15:50:41.532 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.ClientCnxn - Using server principal zookeeper/master
15:50:41.532 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server master/192.168.128.250:2181. Will not attempt to authenticate using SASL (unknown error)
15:50:43.538 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:364)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1432)
15:50:43.538 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown input
java.nio.channels.ClosedChannelException: null
	at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:780)
	at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:399)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:200)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1553)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanAndNotifyState(ClientCnxn.java:1543)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1467)
15:50:43.538 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] DEBUG org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during shutdown output
java.nio.channels.ClosedChannelException: null
	at sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:797)
	at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:407)
	at org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:207)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1553)
	at org.apache.zookeeper.ClientCnxn$SendThread.cleanAndNotifyState(ClientCnxn.java:1543)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1467)
15:50:43.638 [ReadOnlyZKClient-master:2181@0x04a94ee4] WARN org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - 0x04a94ee4 to master:2181 failed for get of /hbase/hbaseid, code = CONNECTIONLOSS, retries = 9
15:50:44.640 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.client.FourLetterWordMain - connecting to master 2181
15:50:46.647 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] WARN org.apache.zookeeper.ClientCnxn - Can not get the principle name from server master
15:50:46.647 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.ClientCnxn - Using server principal zookeeper/master
15:50:46.647 [ReadOnlyZKClient-master:2181@0x04a94ee4-SendThread(master:2181)] INFO org.apache.zookeeper.ClientCnxn - Opening socket connection to server master/192.168.128.250:2181. Will not attempt to authenticate using SASL (unknown error)
Process finished with exit code 130

有可能是你链接Zookeeper的端口号写错了。

比如我的ZK信息为：ZKServer=master:2182

但是我故意写成：ZKServer=master:2181

那么就会报上面的错了。