Hello – I have a long-running job which simultaneously writes to multiple files on HDFS. I am seeing the following error come up:
I would appreciate any insight into what’s going on here. Stopped running due to an exception. com.google.common.util.concurrent.UncheckedExecutionException: java.lang.RuntimeException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException): Failed to create file [/user/vault8/citadel_out/2016_03_20_17_34_339/records/[email protected]] for [DFSClient_NONMAPREDUCE_232430238_1207] for client [10.24.28.64], because this file is already being created by [DFSClient_NONMAPREDUCE_-1482819983_1172] on [10.24.28.64] at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:3122) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:2905) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:3186) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:3149) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:611) at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.append(AuthorizationProviderProxyClientProtocol.java:124) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:416) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1060) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2234) at com.google.common.cache.LocalCache.get(LocalCache.java:3965) at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3969) at com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4829) at com.datatorrent.lib.io.fs.AbstractFileOutputOperator.processTuple(AbstractFileOutputOperator.java:667) at com.datatorrent.lib.io.fs.AbstractFileOutputOperator$1.process(AbstractFileOutputOperator.java:236) at com.datatorrent.api.DefaultInputPort.put(DefaultInputPort.java:67) at com.datatorrent.stram.stream.BufferServerSubscriber$BufferReservoir.sweep(BufferServerSubscriber.java:244) at com.datatorrent.stram.engine.GenericNode.run(GenericNode.java:226) at com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1365) Caused by: java.lang.RuntimeException: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException): Failed to create file [/user/vault8/citadel_out/2016_03_20_17_34_339/records/[email protected]] for [DFSClient_NONMAPREDUCE_232430238_1207] for client [10.24.28.64], because this file is already being created by [DFSClient_NONMAPREDUCE_-1482819983_1172] on [10.24.28.64] at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:3122) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:2905) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:3186) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:3149) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:611) at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.append(AuthorizationProviderProxyClientProtocol.java:124) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:416) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1060) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080) at com.datatorrent.lib.io.fs.AbstractFileOutputOperator$3.load(AbstractFileOutputOperator.java:414) at com.datatorrent.lib.io.fs.AbstractFileOutputOperator$3.load(AbstractFileOutputOperator.java:334) at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3568) at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2350) at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2313) at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2228) ... 9 more Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException): Failed to create file [/user/vault8/citadel_out/2016_03_20_17_34_339/records/[email protected]] for [DFSClient_NONMAPREDUCE_232430238_1207] for client [10.24.28.64], because this file is already being created by [DFSClient_NONMAPREDUCE_-1482819983_1172] on [10.24.28.64] at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:3122) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:2905) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:3186) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:3149) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:611) at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.append(AuthorizationProviderProxyClientProtocol.java:124) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:416) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1060) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080) at org.apache.hadoop.ipc.Client.call(Client.java:1472) at org.apache.hadoop.ipc.Client.call(Client.java:1403) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230) at com.sun.proxy.$Proxy14.append(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.append(ClientNamenodeProtocolTranslatorPB.java:313) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:252) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104) at com.sun.proxy.$Proxy15.append(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.callAppend(DFSClient.java:1842) at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1878) at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1871) at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:329) at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:325) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSystem.java:325) at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:1172) at com.datatorrent.lib.io.fs.AbstractFileOutputOperator$3.load(AbstractFileOutputOperator.java:371) ... 14 more ________________________________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. 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