Thanks Harsh. @Are you using the MultipleOutputs class shipped with Apache Hadoop or one of your own? I am using Apache Hadoop's multipleOutputs.
But as you see in stack trace, it's not appending the attempt id to file name, it's only consists of task id. Thanks & Regards, B Anil Kumar. On Mon, Dec 30, 2013 at 7:42 PM, Harsh J <ha...@cloudera.com> wrote: > Are you using the MultipleOutputs class shipped with Apache Hadoop or > one of your own? > > If its the latter, please take a look at gotchas to take care of > described at > http://wiki.apache.org/hadoop/FAQ#Can_I_write_create.2Fwrite-to_hdfs_files_directly_from_map.2Freduce_tasks.3F > > On Mon, Dec 30, 2013 at 4:22 PM, AnilKumar B <akumarb2...@gmail.com> > wrote: > > Hi, > > > > I am using multiple outputs in our job. So whenever any reduce task > fails, > > all it's next task attempts are failing with file exist exception. > > > > > > The output file name should also append the task attempt right? But it's > > only appending the task id. Is this the bug or Some thing wrong from my > > side? > > > > Where should look in src code? I went through code at > > FileOutputFormat$getTaskOutputPath(), but there it's only considering > task > > id. > > > > > > Exception Trace: > > 13/12/29 09:13:00 INFO mapred.JobClient: Task Id : > > attempt_201312162255_60465_r_000008_0, Status : FAILED > > 13/12/29 09:14:42 WARN mapred.JobClient: Error reading task > > > outputhttp://localhost:50050/tasklog?plaintext=true&attemptid=attempt_201312162255_60465_r_000008_0&filter=stdout > > 13/12/29 09:14:42 WARN mapred.JobClient: Error reading task > > > outputhttp://localhost:50050/tasklog?plaintext=true&attemptid=attempt_201312162255_60465_r_000008_0&filter=stderr > > 13/12/29 09:15:04 INFO mapred.JobClient: map 100% reduce 93% > > 13/12/29 09:15:23 INFO mapred.JobClient: map 100% reduce 96% > > 13/12/29 09:17:31 INFO mapred.JobClient: map 100% reduce 97% > > 13/12/29 09:19:34 INFO mapred.JobClient: Task Id : > > attempt_201312162255_60465_r_000008_1, Status : FAILED > > org.apache.hadoop.ipc.RemoteException: java.io.IOException: failed to > create > > /x/y/z/2013/12/29/04/o_2013_12_29_03-r-00008.gz on client 10.103.10.31 > > either because the filename is invalid or the file exists > > at > > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1672) > > at > > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1599) > > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:732) > > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:711) > > at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown > > Source) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587) > > at > > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1448) > > at > > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1444) > > at java.security.AccessController.doPrivileged(Native > > Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at > > > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232) > > at > > org.apache.hadoop.ipc.Server$Handler.run(Server.java:1442) > > > > at org.apache.hadoop.ipc.Client.call(Client.java:1118) > > at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229) > > at $Proxy7.create(Unknown Source) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native > > Method) > > at > > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at > > > org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85) > > at > > > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62) > > at $Proxy7.create(Unknown Source) > > at > > > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.<init>(DFSClient.java:3753) > > at > > org.apache.hadoop.hdfs.DFSClient.create(DFSClient.java:937) > > at > > > org.apache.hadoop.hdfs.DistributedFileSystem.create(DistributedFileSystem.java:207) > > at > > org.apache.hadoop.fs.FileSystem.create(FileSystem.java:555) > > at > > org.apache.hadoop.fs.FileSystem.create(FileSystem.java:536) > > at > > org.apache.hadoop.fs.FileSystem.create(FileSystem.java:443) > > at > > > org.apache.hadoop.mapreduce.lib.output.TextOutputFormat.getRecordWriter(TextOutputFormat.java:131) > > at > > > org.apache.hadoop.mapreduce.lib.output.MultipleOutputs.getRecordWriter(MultipleOutputs.java:411) > > at > > > org.apache.hadoop.mapreduce.lib.output.MultipleOutputs.write(MultipleOutputs.java:370) > > at > > com.team.hadoop.mapreduce1$Reducer1.reduce(MapReduce1.java:254) > > at > > com.team.hadoop.mapreduce1$Reducer1.reduce(MapReduce1.java::144) > > at > org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:177) > > at > > org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:649) > > at > > org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:418) > > at org.apache.hadoop.mapred.Child$4.run(Child.java:255) > > at java.security.AccessController.doPrivileged(Native > > Method) > > at javax.security.auth.Subject.doAs(Subject.java:396) > > at > > > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232) > > at org.apache.hadoop.mapred.Child.main(Child.java:249) > > > > 13/12/29 09:19:35 WARN mapred.JobClient: Error reading task > > > outputhttp://localhost:50050/tasklog?plaintext=true&attemptid=attempt_201312162255_60465_r_000008_1&filter=stdout > > 13/12/29 09:19:35 WARN mapred.JobClient: Error reading task > > > outputhttp://localhost:50050/tasklog?plaintext=true&attemptid=attempt_201312162255_60465_r_000008_1&filter=stderr > > 13/12/29 09:19:36 INFO mapred.JobClient: map 100% reduce 89% > > 13/12/29 09:19:54 INFO mapred.JobClient: map 100% reduce 92% > > 13/12/29 09:20:11 INFO mapred.JobClient: map 100% reduce 96% > > 13/12/29 09:22:52 INFO mapred.JobClient: map 100% reduce 97% > > 13/12/29 09:23:48 INFO mapred.JobClient: Task Id : > > attempt_201312162255_60465_r_000008_2, Status : FAILED > > org.apache.hadoop.ipc.RemoteException: java.io.IOException: failed to > create > > /x/y/z/2013/12/29/04/o_2013_12_29_03-r-00008.gz on client 10.103.7.33 > either > > because the filename is invalid or the file exists > > at > > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1672) > > at > > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1599) > > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:732) > > at > > org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:711) > > at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown > > Source) > > at > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587) > > at > > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1448) > > > > > > Thanks & Regards, > > B Anil Kumar. > > > > -- > Harsh J >
