Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-user@hadoop.apache.org
Received-SPF: pass (nike.apache.org: domain of harsh@cloudera.com designates
 209.85.210.176 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <CA14D51F.1250F%madhu@permuto.com>
References: <CA14D51F.1250F%madhu@permuto.com>
From: Harsh J <harsh@cloudera.com>
Date: Wed, 8 Jun 2011 22:21:08 +0530
Message-ID: <BANLkTima4JLqFORzEAgU5s6N+Hhb-F2e4w@mail.gmail.com>
Subject: Re: MultipleTextOutputFormat - temp dir does not exist error
To: common-user@hadoop.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

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 <madhu@buysight.com> wrote:
> Hello,
>
> We're using CDH3b3 0.20.2 hadoop. In our map reduce jobs we've extended M=
ultipleTextOutputFormat to override checkOutputSpecs() and generateFileName=
ForKeyValue() returning
> relative path based on key. I don't have multiple jobs running with the s=
ame output directory. When I rerun it succeeds; a couple of runs later it f=
ails. 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(FileOutputCommit=
te r.java:
> 250) at
> org.apache.hadoop.mapred.FileOutputFormat.getTaskOutputPath(FileOutputFor=
ma t.java:
> 240) at
> org.apache.hadoop.mapred.TextOutputFormat.getRecordWriter(TextOutputForma=
t. 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$4.run(Child.java:217) at
> java.security.AccessController.doPrivileged(Native Method) at
> javax.security.auth.Subject.doAs(Subject.java:396) at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation=
.j ava:
> 1063) at org.apache.hadoop.mapred.Child.main(Child.java:211)
>
> attempt 1
>
> org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease
> on /griffin/prod/_temporary/_attempt_201106061713_0045_r_000000_1/
> s2_conv/20110530/part-00000.bz2 File does not exist. Holder
> DFSClient_attempt_201106061713_0045_r_000000_1 does not have any open
> files. at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesyst=
em .java:
> 1488) at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesyst=
em .java:
> 1479) at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FS=
Na mesystem.java:
> 1395) at
> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:
> 588) at sun.reflect.GeneratedMethodAccessor249.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorI=
mp l.java:
> 25) at java.lang.reflect.Method.invoke(Method.java:597) at
> org.apache.hadoop.ipc.RPC$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(DelegatingMethodAccessorI=
mp l.java:
> 25) at java.lang.reflect.Method.invoke(Method.java:597) at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvoc=
at ionHandler.java:
> 82) at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationH=
an 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. =A0What give=
s ?
>
> Thanks,
> Madhu
>


--=20
Harsh J