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： [email protected] 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: [email protected] > To: [email protected] > 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$DiskErrorException: Could not find > taskTracker/jobcache/job_201008171837_0007/attempt_201008171837_0007_m_000006_1/output/file.out.index > in any of the configured local directories > > > > Almost all datanode behave the same way, seems reduce can't get the map > result from other datanode and I also looked at the charts from job > Administrator, the copy process did last quite a long time. Can anybody give > me some explanation,and the following of my configuration of hadoop-0.20.2: > > core-site.xml > > <?xml version="1.0"?> > <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> > <!-- Put site-specific property overrides in this file. --> > <configuration> > <property> > <name>fs.default.name</name> > <value>hdfs://vm153:9000</value> > </property> > <property> > <name>fs.trash.interval</name> > <value>20</value> > </property> > <property> > <name>fs.checkpoint.period</name> > <value>300</value> > <description>The number of seconds between two periodic checkpoints. > </description> > </property> > </configuration> > > hdfs-site.xml > > <?xml version="1.0"?> > <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> > <!-- Put site-specific property overrides in this file. --> > <configuration> > <property> > <name>fs.default.name</name> > <value>hdfs://vm153:9000</value> > </property> > <property> > <name>fs.trash.interval</name> > <value>20</value> > </property> > <property> > <name>fs.checkpoint.period</name> > <value>300</value> > <description>The number of seconds between two periodic checkpoints. > </description> > </property> > </configuration> > [shan...@vm153 conf]$ 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 __________ Information from ESET NOD32 Antivirus, version of virus signature database 5345 (20100805) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
