Or not. I misread your error, that shouldn't be it, sorry. On Wed, Jun 8, 2011 at 10:21 PM, Harsh J <[email protected]> wrote: > Madhu, > > Are you multi-threading in your Reducer code by any chance? MTOF may > not be thread-safe in the release you're using. Using MultipleOutputs > is recommended right now, if this is the cause/case. > > On Wed, Jun 8, 2011 at 7:58 PM, Madhu Ramanna <[email protected]> wrote: >> Hello, >> >> We're using CDH3b3 0.20.2 hadoop. In our map reduce jobs we've extended >> MultipleTextOutputFormat to override checkOutputSpecs() and >> generateFileNameForKeyValue() returning >> relative path based on key. I don't have multiple jobs running with the same >> output directory. When I rerun it succeeds; a couple of runs later it fails. >> Here is a log from failed attempts: >> >> >> attempt 0 >> >> java.io.IOException: The temporary job-output directory >> hdfs://nn:8000/griffin/prod/_temporary doesn't exist! at >> org.apache.hadoop.mapred.FileOutputCommitter.getWorkPath(FileOutputCommitte >> r.java: >> 250) at >> org.apache.hadoop.mapred.FileOutputFormat.getTaskOutputPath(FileOutputForma >> t.java: >> 240) at >> org.apache.hadoop.mapred.TextOutputFormat.getRecordWriter(TextOutputFormat. >> java: >> 129) at >> org.apache.hadoop.mapred.lib.MultipleTextOutputFormat.getBaseRecordWriter(M >> ultipleTextOutputFormat.java: >> 47) at org.apache.hadoop.mapred.lib.MultipleOutputFormat >> $1.write(MultipleOutputFormat.java:102) at >> org.apache.hadoop.mapred.ReduceTask$3.collect(ReduceTask.java:444) at >> com.buysight.griffin.UserHistory$MyReducer.reduce(UserHistory.java: >> 672) at com.buysight.griffin.UserHistory >> $MyReducer.reduce(UserHistory.java:148) at >> org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:467) >> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:415) at >> org.apache.hadoop.mapred.Child$4.run(Child.java:217) at >> java.security.AccessController.doPrivileged(Native Method) at >> javax.security.auth.Subject.doAs(Subject.java:396) at >> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.j >> ava: >> 1063) at org.apache.hadoop.mapred.Child.main(Child.java:211) >> >> attempt 1 >> >> org.apache.hadoop.ipc.RemoteException: >> org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease >> on /griffin/prod/_temporary/_attempt_201106061713_0045_r_000000_1/ >> s2_conv/20110530/part-00000.bz2 File does not exist. Holder >> DFSClient_attempt_201106061713_0045_r_000000_1 does not have any open >> files. at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem >> .java: >> 1488) at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem >> .java: >> 1479) at >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNa >> mesystem.java: >> 1395) at >> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java: >> 588) at sun.reflect.GeneratedMethodAccessor249.invoke(Unknown Source) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp >> l.java: >> 25) at java.lang.reflect.Method.invoke(Method.java:597) at >> org.apache.hadoop.ipc.RPC$Server.call(RPC.java:528) at >> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1319) at >> org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1315) at >> java.security.AccessController.doPrivileged(Native Method) at >> javax.security.auth.Subject.doAs(Subject.java:396) at >> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.j >> ava: >> 1063) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1313) at >> org.apache.hadoop.ipc.Client.call(Client.java:1054) at >> org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226) at >> $Proxy1.addBlock(Unknown Source) at >> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: >> 39) at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp >> l.java: >> 25) at java.lang.reflect.Method.invoke(Method.java:597) at >> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocat >> ionHandler.java: >> 82) at >> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHan >> dler.java: >> 59) at $Proxy1.addBlock(Unknown Source) at >> org.apache.hadoop.hdfs.DFSClient >> $DFSOutputStream.locateFollowingBlock(DFSClient.java:3166) at >> org.apache.hadoop.hdfs.DFSClient >> $DFSOutputStream.nextBlockOutputStream(DFSClient.java:3036) at >> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access >> $1900(DFSClient.java:2288) at org.apache.hadoop.hdfs.DFSClient >> $DFSOutputStream$DataStreamer.run(DFSClient.java:2483) >> >> I've tried turning off speculative execution. Still no luck. What gives ? >> >> Thanks, >> Madhu >> > > > > -- > Harsh J >
-- Harsh J
