报错信息：
19/07/23 05:43:32 FATAL tools.DFSZKFailoverController: Got a fatal error, exiting now
org.apache.hadoop.HadoopIllegalArgumentException: Bad argument: -format
at org.apache.hadoop.ha.ZKFailoverController.badArg(ZKFailoverController.java:251)
at org.apache.hadoop.ha.ZKFailoverController.doRun(ZKFailoverController.java:214)
at org.apache.hadoop.ha.ZKFailoverController.access$000(ZKFailoverController.java:61)
at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:172)
at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:168)
at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:412)
at org.apache.hadoop.ha.ZKFailoverController.run(ZKFailoverController.java:168)
at org.apache.hadoop.hdfs.tools.DFSZKFailoverController.main(DFSZKFailoverController.java:181)
19/07/23 05:43:32 WARN ha.ActiveStandbyElector: Ignoring stale result from old client with sessionId 0x16c1eb716770005
19/07/23 05:43:32 INFO zookeeper.ClientCnxn: EventThread shut down
