报错信息如下

-- ::, INFO  [main]: retry.RetryInvocationHandler (RetryInvocationHandler.java:invoke()) 
- Exception while invoking getFileInfo of class ClientNamenodeProtocolTranslatorPB over bdata236/192.168.1.236: 
after  fail over attempts. Trying to fail over after sleeping for 5584ms.

org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby

 at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:)

 at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:)
  • 我出现这个问题的原因是两个namenode都是standby状态，发现是因为zkfc没有起来，启动zkfc就OK了。

　　进入hadoop/bin目录下

　./hadoop-daemon.sh start zkfc
  • 还有可能是因为防火墙问题,关闭即可
service iptables stop  (centos6)

systemctl stop firewalld(centos7)

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