报错信息如下

  1. -- ::, 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.
  2. org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby
  3.  at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:)
  4.  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

  1. 　./hadoop-daemon.sh start zkfc
  • 还有可能是因为防火墙问题,关闭即可
  1. service iptables stop  (centos6)
  2.  
  3. systemctl stop firewalld(centos7)

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