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RE: Re: what happen in my hadoop cluster? - MapReduce - [mail # user]
...Can you check the name node logs what is going on with name node?    When we start the name node, it will be in the while initializing and after some time it will be turned off aut...
   Author: Devaraj K, 2011-07-27, 08:26
Problem while running eclipse-files for Next Gen Mapreduce branch - MapReduce - [mail # dev]
...Hi,        I am getting this below errors when I try to generate eclipse files using eclipse-files target. Can anybody help me?        Buildfile: D:\s...
   Author: Devaraj K, 2011-07-08, 14:00
[MAPREDUCE-2647] Memory sharing across all the Tasks in the Task Tracker to improve the job performance - MapReduce - [issue]
...If all the tasks (maps/reduces) are using (working with) the same additional data to execute the map/reduce task, each task should load the data into memory individually and read the data. I...
http://issues.apache.org/jira/browse/MAPREDUCE-2647    Author: Devaraj K, 2011-07-06, 10:59
RE: MapReduce output could not be written - MapReduce - [mail # user]
...Check the datanode logs, whether it is registered with namenode or not. At the same time you can check any problem occurred while initializing the datanode. If it registers successfully it s...
   Author: Devaraj K, 2011-07-05, 14:33
RE: hadoop job is run slow in multicluster configuration - MapReduce - [mail # user]
...Can you check the logs in the task tracker machine, what is happening to the task execution and status of the task?     Devaraj K   This e-mail and its attachments contain con...
   Author: Devaraj K, 2011-07-01, 12:11
RE: Relation between Mapper and Combiner - MapReduce - [mail # user]
...Hi Lucian,                 For every map task, combiner will be executed multiple times before writing the map output. Combine step is not a separate ...
   Author: Devaraj K, 2011-07-01, 11:47
RE: Map job hangs indefinitely - MapReduce - [mail # user]
...With this info it is difficult to find out where the problem is coming. Can you check the job tracker and task tracker logs related to these jobs?      Devaraj K    ...
   Author: Devaraj K, 2011-06-22, 06:43
RE: Tasktracker denied communication with jobtracker - MapReduce - [mail # user]
...Hi Virajith,              This exception will be thrown when the host name present in the file which is the value for the property "mapred.hosts.exclude". ...
   Author: Devaraj K, 2011-06-22, 05:32
[MAPREDUCE-2464] NullPointerException is coming in the job tracker when job tracker resends the previous heartbeat response. - MapReduce - [issue]
...Over the network, the heartbeat response sent by Job Tracker to Task Tracker might get lost. When Task Tracker sends the old heart beat again to Job Tracker then Job Tracker finds and ignore...
http://issues.apache.org/jira/browse/MAPREDUCE-2464    Author: Devaraj K, 2011-05-02, 19:13
[MAPREDUCE-2306] It is better to give Job start time instead of JobTracker start time in the JobTracker UI->Home. - MapReduce - [issue]
...In the log details, for each job it is giving JobTracker start time and also In the JobTracker UI->Home it is giving Start time of JobTracker. It is better to give JobId start time instea...
http://issues.apache.org/jira/browse/MAPREDUCE-2306    Author: Devaraj K, 2011-04-09, 06:28
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