[HDFS-14161] RBF: Throw StandbyException instead of IOException so that client can retry when can not get connection

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.1, 2.9.2, 3.0.3
• Fix Version/s: 3.3.0, HDFS-13891
• Hadoop Flags: Reviewed
• Assignee: Hui Fei
• Reporter: Hui Fei
• Created: 19/Dec/18 03:15
• Updated: 12/Sep/19 19:54
• Resolved: 02/Jan/19 18:49

Description

Hive Client may hang when get IOException, stack follows

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

If router throw RetriableException when can not get connection and client set dfs.client.retry.policy.enabled true, this problem can be resvoled.

Issue Links

• is related to: HDFS-13488 RBF: Reject requests when a Router is overloaded