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Getting Info message while reading and writing message in HDFS


I am getting info messages like the one below while reading and writing files in hdfs.

can anyone explain the meaning of this message, will it cause any issues? I have 3 Namenode(open-source Hadoop) in HA.


INFO retry.RetryInvocationHandler: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby. Visit
at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(
at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getFileInfo(
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getFileInfo(
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(
at org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$
at org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$
at org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$
at org.apache.hadoop.ipc.RPC$
at org.apache.hadoop.ipc.Server$
at org.apache.hadoop.ipc.Server$
at Method)
at org.apache.hadoop.ipc.Server$
, while invoking ClientNamenodeProtocolTranslatorPB.getFileInfo over hostname/ip:8020 after 1 failover attempts. Trying to failover after sleeping for 1195ms.





Cloudera Employee

Hello @KPG1 ,


If you are able to successfully read/write from HDFS and if these messages are appearing only on standby NN logs, then it should be normal. 


Thank you.

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