通过java连接kerberos 认证hbase，获取命名空间抛出异常MasterNotRunningException Connection closed
Caused by: org.apache.hadoop.hbase.MasterNotRunningException: java.io.IOException: Call to aaa.bbb.net/10.92.197.181:16000 failed on local exception: java.io.IOException: Connection closed
通过认证时没有问题，拿到connection后，去查询时抛出异常