retry.RetryInvocationHandler (RetryInvocationHandler.java:invoke(140)) - Exception while invoking getFileInfo of class ClientNamenodeProtocolTranslatorPB over bdata236/192.168.1.236:9000 after 3 fail

報錯信息如下

2017-12-20 12:29:09,161 INFO  [main]: retry.RetryInvocationHandler (RetryInvocationHandler.java:invoke(140)) 
- Exception while invoking getFileInfo of class ClientNamenodeProtocolTranslatorPB over bdata236/192.168.1.236:9000 
after 3 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:87)
 at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:1719)

• 我出現這個問題的原因是兩個namenode都是standby狀態，發現是因為zkfc沒有起來，啟動zkfc就OK了。

　　進入hadoop/bin目錄下

　./hadoop-daemon.sh start zkfc

 

• 還有可能是因為防火牆問題,關閉即可

service iptables stop  (centos6)

systemctl stop firewalld(centos7)