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From "shangan" <shan...@corp.kaixin001.com>
Subject Re: RE: mapreduce doesn't work in my cluster
Date Wed, 18 Aug 2010 09:16:42 GMT
127.0.0.1               localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6
192.168.0.153           vm153
192.168.0.148           vm148
192.168.0.152           vm152
192.168.0.154           vm154

the vm153,vm148,vm152,vm154 are the nodes I'm using in the cluster, as each node has some
other ip-host mapping pairs for other use and I don't know whether it will affect. Looking
forward your further help,I really appreciate it.


2010-08-18 



shangan 



发件人: xiujin yang 
发送时间: 2010-08-18  17:08:27 
收件人: common-user@hadoop.apache.org 
抄送: 
主题: RE: mapreduce doesn't work in my cluster 
 
Hi Shangan,
Please check your /etc/hosts, if all machines are setted. 
Best,
Yang.
> Date: Wed, 18 Aug 2010 15:01:46 +0800
> From: shangan@corp.kaixin001.com
> To: common-user@hadoop.apache.org
> Subject: mapreduce doesn't work in my cluster
> 
> my cluster consists of 4 nodes : 1 namenode and 3 datanodes, it works well functioning
as hdfs,but when I run mapreduce tasks, it will take quite a long time and there're quite
a lot of too many fetch-failures. I've checked the log on the datanode and copy part of them
as follows:
> 
> 
> 
> 2010-08-18 14:28:33,142 WARN org.apache.hadoop.mapred.TaskTracker: Unknown child with
bad map output: attempt_201008171837_0007_m_000006_1. Ignored.
> 2010-08-18 14:28:33,143 INFO org.apache.hadoop.mapred.TaskTracker.clienttrace: src: 127.0.0.1:50060,
dest: 127.0.0.1:54245, bytes: 0, op: MAPRED_SHUFFLE, cliID: attempt_201008171837_0007_m_000006_1
> 2010-08-18 14:28:33,143 WARN org.mortbay.log: /mapOutput: org.apache.hadoop.util.DiskChecker$DiskErrorException:
Could not find taskTracker/jobcache/job_201008171837_0007/attempt_201008171837_0007_m_000006_1/output/file.out.index
in any of the configured local directories
> 2010-08-18 14:28:34,766 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:37,675 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:40,775 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:43,683 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:43,779 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:46,687 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:49,787 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:52,696 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:55,796 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:58,704 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:28:58,800 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:29:01,710 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000003_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:29:04,808 INFO org.apache.hadoop.mapred.TaskTracker: attempt_201008171837_0007_r_000000_1
0.31666666% reduce > copy (19 of 20 at 0.00 MB/s) > 
> 2010-08-18 14:29:05,225 WARN org.apache.hadoop.mapred.TaskTracker: getMapOutput(attempt_201008171837_0007_m_000006_1,0)
failed :
> org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find taskTracker/jobcache/job_201008171837_0007/attempt_201008171837_0007_m_000006_1/output/file.out.index
in any of the configured local directories
>         at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathToRead(LocalDirAllocator.java:389)
>         at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathToRead(LocalDirAllocator.java:138)
>         at org.apache.hadoop.mapred.TaskTracker$MapOutputServlet.doGet(TaskTracker.java:2887)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>         at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
>         at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:363)
>         at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>         at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>         at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>         at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
>         at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
>         at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>         at org.mortbay.jetty.Server.handle(Server.java:324)
>         at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
>         at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
>         at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:533)
>         at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:207)
>         at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:403)
>         at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
>         at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:522)
> 2010-08-18 14:29:05,225 WARN org.apache.hadoop.mapred.TaskTracker: Unknown child with
bad map output: attempt_201008171837_0007_m_000006_1. Ignored.
> 2010-08-18 14:29:05,259 INFO org.apache.hadoop.mapred.TaskTracker.clienttrace: src: 127.0.0.1:50060,
dest: 127.0.0.1:54288, bytes: 0, op: MAPRED_SHUFFLE, cliID: attempt_201008171837_0007_m_000006_1
> 2010-08-18 14:29:05,259 WARN org.mortbay.log: /mapOutput: org.apache.hadoop.util.DiskChecker$DiskErrorException:
Could not find taskTracker/jobcache/job_201008171837_0007/attempt_201008171837_0007_m_000006_1/output/file.out.index
in any of the configured local directories
> 
> 
> 
> Almost all datanode behave the same way, seems reduce can't get the map result from other
datanode and I also looked at the charts from job Administrator, the copy process did last
quite a long time. Can anybody give me some explanation,and the following of my configuration
of hadoop-0.20.2:
> 
> core-site.xml
> 
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
> <!-- Put site-specific property overrides in this file. -->
> <configuration>
>    <property>
>         <name>fs.default.name</name>
>         <value>hdfs://vm153:9000</value>
>    </property>
>    <property>
>         <name>fs.trash.interval</name>
>         <value>20</value>
>    </property>
> <property>
>   <name>fs.checkpoint.period</name>
>   <value>300</value>
>   <description>The number of seconds between two periodic checkpoints.
>   </description>
> </property>
> </configuration>
> 
> hdfs-site.xml
> 
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
> <!-- Put site-specific property overrides in this file. -->
> <configuration>
>    <property>
>         <name>fs.default.name</name>
>         <value>hdfs://vm153:9000</value>
>    </property>
>    <property>
>         <name>fs.trash.interval</name>
>         <value>20</value>
>    </property>
> <property>
>   <name>fs.checkpoint.period</name>
>   <value>300</value>
>   <description>The number of seconds between two periodic checkpoints.
>   </description>
> </property>
> </configuration>
> [shangan@vm153 conf]$ more hdfs-site.xml 
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
> <!-- Put site-specific property overrides in this file. -->
> <configuration>
> <property>
>   <name>dfs.replication</name>
>   <value>2</value>
> </property>
> <property>
>   <name>dfs.hosts.exclude</name>
>   <value>/home/shangan/bin/hadoop-0.20.2/conf/exclude</value>
> </property>
> </configuration>
> 
> mapred-site.xml
> 
> <?xml version="1.0"?>
> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
> <!-- Put site-specific property overrides in this file. -->
> <configuration>
>    <property>
>         <name>mapred.job.tracker</name>
>         <value>vm153:9001</value>
>    </property>
>    <property>
>         <name>mapred.map.tasks</name>
>         <value>20</value>
>    </property>
>    <property>
>         <name>mapred.reduce.tasks</name>
>         <value>5</value>
>    </property>
> </configuration>
> 
> WHAT'S THE PROBLEM ?Do I need to configure other parameters, there're parameters like
dfs.secondary.http.address,dfs.datanode.address, the ip of which is 0.0.0.0,do I need to change
them ?
> 
> 2010-08-18 
> 
> 
> 
> shangan 
          
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