Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-user@hadoop.apache.org
Received-SPF: neutral (athena.apache.org: local policy)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.com.cn;
  h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type;
  b=X27pQ9piYcOxdXU/eDb96AWtzOOJBEUiqSlsMXGthmVYqkoolvCPXVQM15dI0J5QEg7aAwiMCLKkFqMIMdTNG1aNdMorPEBAKgXxCW4pOXRNgWWLIhNQFghdMUEtj3sicDW27r86FDQzCvQVprDLxWLP0xHV5vIfVUMsVEpJFG4=;
Message-ID: <344889.64919.qm@web15205.mail.cnb.yahoo.com>
Date: Fri, 11 Sep 2009 00:09:40 -0700 (PDT)
From: qiu tian <tianqiu_527@yahoo.com.cn>
Subject: 
 =?utf-8?B?6L2s5Y+ROiBhIHByb2JsZW0gaW4gaGFkb29wIGNsdXN0ZXI6cmVkdWNlIHRh?=
 =?utf-8?B?c2sgY291bGRuJ3QgZmluZCBtYXAgdGFza3MnIG91dHB1dC4=?=
To: core-user@hadoop.apache.org
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="0-296730255-1252652980=:64919"

--0-296730255-1252652980=:64919
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable


--- 09=E5=B9=B49=E6=9C=8811=E6=97=A5=EF=BC=8C=E5=91=A8=E4=BA=94, qiu tian <=
tianqiu_527@yahoo.com.cn> =E5=86=99=E9=81=93=EF=BC=9A

=E5=8F=91=E4=BB=B6=E4=BA=BA: qiu tian <tianqiu_527@yahoo.com.cn>
=E4=B8=BB=E9=A2=98: a problem in hadoop cluster:reduce task couldn't find m=
ap tasks' output.
=E6=94=B6=E4=BB=B6=E4=BA=BA: common-user@hadoop.apache.org, common-user-hel=
p@hadoop.apache.org
=E6=97=A5=E6=9C=9F: 2009=E5=B9=B49=E6=9C=8811=E6=97=A5,=E5=91=A8=E4=BA=94,=
=E4=B8=8B=E5=8D=881:57

Hi everyone!
I tried hadoop cluster setup on 4 pcs. I ran into a=0Aproblem about hadoop-=
common. when I ran the command'bin/hadoop jar=0Ahadoop-*-examples.jar wordc=
ount input output', the map tasks could=0Acomplet quickly, but the reduce p=
hase took very long to complet. I=0Athink it's caused by the config, so I c=
hanged the hadoop-site.xml for=0Amany times, which didn't work. Here are ha=
doop-site.xml:
=0A

namevaluedescriptionfs.default.namehdfs://192.*.*.*:9000
mapred.job.tracker=0A192.*.*.*:9001
hadoop.tmp.dir/home/*/hadoop/tmp


=0A


=0A


=0A


=0A

here is another hadoop-site.xml:
namevaluedescriptionfs.default.namehdfs://192.*.*.*:9000
mapred.job.tracker=0A192.*.*.*:9001
hadoop.tmp.dir/home/*/hadoop/tmp
dfs.replication2
=0Adfs.name.dir/home/*/hadoop/file/name
dfs.data.dir/home/*/hadoop/file/data
mapred.system.dir=0A/home/*/hadoop/file/mapred/ system
mapred.local.dir/home/*/hadoop/file/mapred/ local
mapred.temp.dir=0A/home/*/hadoop/file/mapred/tmp
mapred.tasktracker.map.tasks. maximum2
mapred.tasktracker.reduce. tasks.maximum=0A2

Both of them above couldn't work.
Here is a problem from a tasktracker:

2009-09-10 20:08:35,169 INFO org.apache.hadoop.mapred. TaskTracker: org.apa=
che.hadoop.util. DiskChecker$ DiskErrorException: Could not find taskTracke=
r/jobcache/job_ 200909102001_0001/attempt_ 200909102001_0001_m_000005_0/ ou=
tput/file.out in any of the configured local directories
=0A
I=C2=A0 am looking forward to your reply! Thanks!

Yan
=0A=0A=0A        =E5=A5=BD=E7=8E=A9=E8=B4=BA=E5=8D=A1=E7=AD=89=E4=BD=A0=E5=
=8F=91=EF=BC=8C=E9=82=AE=E7=AE=B1=E8=B4=BA=E5=8D=A1=E5=85=A8=E6=96=B0=E4=B8=
=8A=E7=BA=BF=EF=BC=81=0A=0A=0A      _______________________________________=
____________________ =0A  =E5=A5=BD=E7=8E=A9=E8=B4=BA=E5=8D=A1=E7=AD=89=E4=
=BD=A0=E5=8F=91=EF=BC=8C=E9=82=AE=E7=AE=B1=E8=B4=BA=E5=8D=A1=E5=85=A8=E6=96=
=B0=E4=B8=8A=E7=BA=BF=EF=BC=81 =0Ahttp://card.mail.cn.yahoo.com/
--0-296730255-1252652980=:64919--