Fei Hui created HDFS-15078:
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Summary: RBF: Should check connection channel before sending rpc
to namenode
Key: HDFS-15078
URL: https://issues.apache.org/jira/browse/HDFS-15078
Project: Hadoop HDFS
Issue Type: Improvement
Components: rbf
Affects Versions: 3.3.0
Reporter: Fei Hui
Assignee: Fei Hui
dfsrouter logs show that
{quote}
2019-12-20 04:11:26,724 WARN org.apache.hadoop.ipc.Server: IPC Server handler
6400 on 8888, call org.apache.hadoop.hdfs.protocol.ClientProtocol.create from
10.83.164.11:56908 Call#2 Retry#0: output error
2019-12-20 04:11:26,724 INFO org.apache.hadoop.ipc.Server: IPC Server handler
125 on 8888 caught an exception
java.nio.channels.ClosedChannelException
at
sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:270)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:461)
at org.apache.hadoop.ipc.Server.channelWrite(Server.java:2731)
at org.apache.hadoop.ipc.Server.access$2100(Server.java:134)
at
org.apache.hadoop.ipc.Server$Responder.processResponse(Server.java:1089)
at org.apache.hadoop.ipc.Server$Responder.doRespond(Server.java:1161)
at
org.apache.hadoop.ipc.Server$Connection.sendResponse(Server.java:2109)
at org.apache.hadoop.ipc.Server$Connection.access$400(Server.java:1229)
at org.apache.hadoop.ipc.Server$Call.sendResponse(Server.java:631)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2245)
{quote}
Maybe checking connection between client and router is better before sendingrpc
to namenode
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