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https://issues.apache.org/jira/browse/HADOOP-3362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12618340#action_12618340
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solatis edited comment on HADOOP-3362 at 7/30/08 7:05 AM:
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Hello,
Just to let you know: I'm having the same issues. As long as I have a
semi-distributed 1 node setup, everything goes fine; it stalls with similar
problems while Reduce'ing when I make a 2-node setup of it.
Did you manage to find the cause of the problem, and/or a fix/workaround?
was (Author: solatis):
Hello,
Just to let you know: I'm having the same issues. As long as I have a
semi-distributed 1 node setup, everything goes fine; it stalls with similar
problems while Reduce'ing.
Did you manage to find the cause of the problem, and/or a fix/workaround?
> Reduce Task wont complete goes till 16% and halts
> -------------------------------------------------
>
> Key: HADOOP-3362
> URL: https://issues.apache.org/jira/browse/HADOOP-3362
> Project: Hadoop Core
> Issue Type: Bug
> Affects Versions: 0.16.3
> Environment: Distributor ID: Ubuntu
> Description: Ubuntu 7.10
> Release: 7.10
> Codename: gutsy
> JDK 1.6
> Reporter: Amit Kumar Singh
> Attachments: hadoop-hadoop-datanode-cse-desktop.log,
> hadoop-hadoop-jobtracker-cse-desktop.log,
> hadoop-hadoop-namenode-cse-desktop.log,
> hadoop-hadoop-secondarynamenode-cse-desktop.log,
> hadoop-hadoop-tasktracker-cse-desktop.log
>
>
> I have been trying word count example distributed with Hadoop 0.16.3.
> It works fine on single machine mode. But the moment i add an extra slave
> reduce phase stalls.
> Went through some of the post like http://www.mail-archive.com/[EMAIL
> PROTECTED]/msg01688.html
> but to no avail.
> Can you please give some pointers
> Environment
> JDK 6.0
> Ubuntu
> I Get following message in my logs SLAVE
> .
> 2008-05-07 23:37:27,860 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:37:33,862 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:37:39,864 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:37:42,866 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:37:48,868 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:37:54,870 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:00,872 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:03,873 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:09,875 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:15,876 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:18,878 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:24,880 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:30,882 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:38:33,883 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:18,898 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:24,900 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:30,902 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:33,903 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:39,905 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:45,907 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:48,908 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:39:54,910 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:00,912 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:03,913 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:09,915 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:15,917 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:18,919 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:24,921 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:27,120 INFO org.apache.hadoop.mapred.TaskTracker:
> LaunchTaskAction: task_200805080929_0001_m_000001_1
> 2008-05-07 23:40:28,705 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_m_000001_1 1.0%
> hdfs://master:54310/user/hadoop/d3:337381+337381
> 2008-05-07 23:40:28,708 INFO org.apache.hadoop.mapred.TaskTracker: Task
> task_200805080929_0001_m_000001_1 is done.
> 2008-05-07 23:40:30,923 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.16666667% reduce > copy (1 of 2 at 0.03
> MB/s) >
> 2008-05-07 23:40:36,925 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.33333334% reduce > copy (2 of 2 at 0.00
> MB/s)
> 2008-05-07 23:40:37,558 INFO org.apache.hadoop.mapred.TaskTracker:
> task_200805080929_0001_r_000000_0 0.8684772% reduce > reduce
> 2008-05-07 23:40:37,559 INFO org.apache.hadoop.mapred.TaskTracker: Task
> task_200805080929_0001_r_000000_0 is done.
> 2008-05-07 23:40:39,692 INFO org.apache.hadoop.mapred.TaskTracker: Received
> 'KillJobAction' for job: job_200805080929_0001
> 2008-05-07 23:40:39,692 INFO org.apache.hadoop.mapred.TaskRunner:
> task_200805080929_0001_m_000001_1 done; removing files.
> 2008-05-07 23:40:39,695 INFO org.apache.hadoop.mapred.TaskRunner:
> task_200805080929_0001_m_000000_0 done; removing files.
> 2008-05-07 23:40:39,698 INFO org.apache.hadoop.mapred.TaskRunner:
> task_200805080929_0001_r_000000_0 done; removing files.
> 2008-05-07 23:45:49,869 INFO org.apache.hadoop.mapred.TaskTracker:
> LaunchTaskAction: task_200805080929_0002_m_000001_0
> And in MASTER(which is also a slave)
> 008-05-08 09:30:58,991 INFO org.apache.hadoop.mapred.JobInProgress: Task
> 'task_200805080929_0001_m_000000_0' has completed
> tip_200805080929_0001_m_000000 successfully.
> 2008-05-08 09:33:39,111 INFO org.apache.hadoop.mapred.JobInProgress: Failed
> fetch notification #1 for task task_200805080929_0001_m_000001_0
> 2008-05-08 09:36:14,303 INFO org.apache.hadoop.conf.Configuration: found
> resource webapps/static/jobconf.xsl at
> file:/home/hadoop/HADOOP/hadoop-0.16.3/webapps/static/jobconf.xsl
> 2008-05-08 09:38:36,511 INFO org.apache.hadoop.mapred.JobInProgress: Failed
> fetch notification #2 for task task_200805080929_0001_m_000001_0
> 2008-05-08 09:43:44,540 INFO org.apache.hadoop.mapred.JobInProgress: Failed
> fetch notification #3 for task task_200805080929_0001_m_000001_0
> 2008-05-08 09:43:44,540 INFO org.apache.hadoop.mapred.JobInProgress:* Too
> many fetch-failures for output of task: ta*sk_200805080929_0001_m_000001_0
> ... killing it
> 2008-05-08 09:43:44,540 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from task_200805080929_0001_m_000001_0: Too many fetch-failures
> 2008-05-08 09:43:44,541 INFO org.apache.hadoop.mapred.JobInProgress: Choosing
> normal task tip_200805080929_0001_m_000001
> 2008-05-08 09:43:44,541 INFO org.apache.hadoop.mapred.JobTracker: Adding task
> 'task_200805080929_0001_m_000001_1' to tip tip_200805080929_0001_m_000001,
> for tracker 'tracker_mtech-desktop:localhost/127.0.0.1:39716'
> 2008-05-08 09:43:46,695 INFO org.apache.hadoop.mapred.TaskRunner: Saved
> output of task 'task_200805080929_0001_m_000001_1' to
> hdfs://master:54310/user/hadoop/d4
> 2008-05-08 09:43:46,695 INFO org.apache.hadoop.mapred.JobInProgress: Task
> 'task_200805080929_0001_m_000001_1' has completed
> tip_200805080929_0001_m_000001 successfully.
> 2008-05-08 09:43:46,757 INFO org.apache.hadoop.mapred.JobTracker: Removed
> completed task 'task_200805080929_0001_m_000001_0' from 'tracker_cse
> Can any one give some ideas as to what might be the problem.
> Configuration of cluster is as per
> (http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_%28Multi-Node_Cluster%29)
>
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