hadoop-mapreduce-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-2637) Providing options to debug the mapreduce user code (Mapper, Reducer, Combiner, Sort implementations)
Date Fri, 01 Jul 2011 15:12:28 GMT
Providing options to debug the mapreduce user code (Mapper, Reducer, Combiner, Sort implementations)
----------------------------------------------------------------------------------------------------

                 Key: MAPREDUCE-2637
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2637
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: tasktracker
            Reporter: Devaraj K
            Assignee: Devaraj K


Presently Hadoop provides "mapred.child.java.opts" configuration which can be used to set
JVM options for Child JVM running Map or Reduce Task. 
If we need to remote debug the Child JVM, we can add remote debugging options to this configuration
value.
But this will work only for single Child JVM. Other children will fail as the remote debugging
port is already used.
We cannot specify the remote debugging port dynamically.
As a result, it's not possible to remote debug multiple Child JVMs.
As a solution to this problem, we can provide a configuration to debug Task JVMs in this scenario.


--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message