Hadoop Error Operation category READ is not supported in state standby

Report the following error

Workaround:

Method One: (results do not work)

Through shell command, Hadoop/bin/hdfs haadmin-failover--forceactive hadoop2 HADOOP1 (Note that this method was originally forced to switch namenode in manual recovery)

Returns results, unsupported, and sincere hints that this command will only work in the case of a manual failover

Method Two: (works)

I used JPS check the status of the zookeeper cluster, found that no indication of the failure of two, the original is the reason for ZK, then restarted the ZK cluster, and then restarted Zkfailovercontroller, no such role exists, Naturally, it doesn't automatically switch namenode.

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Hadoop Error Operation category READ is not supported in state standby