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From Serega Sheypak <serega.shey...@gmail.com>
Subject Re: SSVD: lease conflict due to 2 attempts using the same dir
Date Wed, 08 Oct 2014 07:07:10 GMT
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

Looks like two clients try to write to the same dir and they are trying to
write to the same file.

2014-10-08 6:24 GMT+04:00 Dmitriy Lyubimov <dlieu.7@gmail.com>:

> Usually map reduce output format would issue a much clearer message.this on
> the other hand looks like a name node operation conflict.
>
> Sent from my phone.
> On Oct 7, 2014 3:23 PM, "Suneel Marthi" <smarthi@apache.org> wrote:
>
> > Have u tried running with -ow (overwrite) option, that should clear all
> > tmpdir between successive runs ??
> >
> > The SSVD code does clear the tmpdir when -ow is specified.
> >
> > On Tue, Oct 7, 2014 at 5:55 PM, Yang <teddyyyy123@gmail.com> wrote:
> >
> > > 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)
> > >
> >
>

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