we are running mahout ssvd, with a --tempDir parameter, but we are constantly getting this error below.
the following seems to suggest that the 2 attempts in mapper are trying to access the same tmp dir on hdfs. if this is the cause, then ssvd has a bug in that different attempts should use different temp dirs . right? I'm trying now without the --tempDir param thanks Yang Error: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException): Lease mismatch on /user/myuser/CIReco/shoes/ssvd/tmp/ssvd/Bt-job/Q-m-00000 owned by DFSClient_attempt_1412632629877_7081_m_000000_1_196610264_1 but is accessed by DFSClient_attempt_1412632629877_7081_m_000000_0_1051299648_1 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:2967) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFileInternal(FSNamesystem.java:3016) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFile(FSNamesystem.java:2996) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.complete(NameNodeRpcServer.java:647) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.complete(ClientNamenodeProtocolServerSideTranslatorPB.java:484) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2020) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2016) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1650) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2014) at org.apache.hadoop.ipc.Client.call(Client.java:1410) at org.apache.hadoop.ipc.Client.call(Client.java:1363) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) at com.sun.proxy.$Proxy15.complete(Unknown Source) 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:190) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:103) at com.sun.proxy.$Proxy15.complete(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.complete(ClientNamenodeProtocolTranslatorPB.java:404) at org.apache.hadoop.hdfs.DFSOutputStream.completeFile(DFSOutputStream.java:2116) at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:2100) at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:70) at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:103) at org.apache.hadoop.io.SequenceFile$Writer.close(SequenceFile.java:1279) at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.close(SequenceFile.java:1501) at org.apache.hadoop.mapred.SequenceFileOutputFormat$1.close(SequenceFileOutputFormat.java:79) at org.apache.hadoop.mapred.lib.MultipleOutputs.close(MultipleOutputs.java:537) at org.apache.mahout.common.IOUtils$MultipleOutputsCloseableAdapter.close(IOUtils.java:193) at org.apache.mahout.common.IOUtils.close(IOUtils.java:128) at org.apache.mahout.math.hadoop.stochasticsvd.BtJob$BtMapper.cleanup(BtJob.java:295) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:148) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167) 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:1650) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
