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https://issues.apache.org/jira/browse/HDFS-14161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16725228#comment-16725228
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Íñigo Goiri commented on HDFS-14161:
------------------------------------
Moved this as part of HDFS-13891.
The patch should also target the branch.
> RBF: Throw RetriableException instead of IOException so that client can retry
> when can not get connection
> ---------------------------------------------------------------------------------------------------------
>
> Key: HDFS-14161
> URL: https://issues.apache.org/jira/browse/HDFS-14161
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.1.1, 2.9.2, 3.0.3
> Reporter: Fei Hui
> Assignee: Fei Hui
> Priority: Major
> Attachments: HDFS-14161.001.patch
>
>
> Hive Client may hang when get IOException, stack follows
> {code:java}
> Exception in thread "Thread-150" java.lang.RuntimeException:
> org.apache.hadoop.ipc.RemoteException(java.io.IOException): Cannot get a
> connection to bigdata-nn20.g01:8020
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.getConnection(RouterRpcClient.java:262)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.invokeMethod(RouterRpcClient.java:380)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.invokeSequential(RouterRpcClient.java:752)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.getFileInfo(RouterRpcServer.java:1152)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:849)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2134)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2130)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1867)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2130)
> at
> org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:554)
> at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:74)
> Caused by: org.apache.hadoop.ipc.RemoteException(java.io.IOException): Cannot
> get a connection to bigdata-nn20.g01:8020
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.getConnection(RouterRpcClient.java:262)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.invokeMethod(RouterRpcClient.java:380)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.invokeSequential(RouterRpcClient.java:752)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.getFileInfo(RouterRpcServer.java:1152)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getFileInfo(ClientNamenodeProtocolServerSideTranslatorPB.java:849)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2134)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2130)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1867)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2130)
> at org.apache.hadoop.ipc.Client.call(Client.java:1503)
> at org.apache.hadoop.ipc.Client.call(Client.java:1441)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
> at com.sun.proxy.$Proxy14.getFileInfo(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:775)
> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:253)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:101)
> at com.sun.proxy.$Proxy15.getFileInfo(Unknown Source)
> at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:2111)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$23.doCall(DistributedFileSystem.java:1390)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem$23.doCall(DistributedFileSystem.java:1386)
> at
> org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1402)
> at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1494)
> at
> org.apache.hadoop.hive.ql.session.SessionState.createPath(SessionState.java:719)
> at
> org.apache.hadoop.hive.ql.session.SessionState.createTmpTableSpaceDir(SessionState.java:635)
> at
> org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:613)
> at
> org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:540)
> ... 1 more
> {code}
> If router throw RetriableException when can not get connection and client set
> *dfs.client.retry.policy.enabled* true, this problem can be resvoled.
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