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Posted to mapreduce-dev@hadoop.apache.org by "J.Andreina (JIRA)" <ji...@apache.org> on 2016/03/29 06:19:25 UTC
[jira] [Created] (MAPREDUCE-6664) Wrong default value is returned
and the javadoc explanation is misleading for JobConf#getNumMapTasks
J.Andreina created MAPREDUCE-6664:
-------------------------------------
Summary: Wrong default value is returned and the javadoc explanation is misleading for JobConf#getNumMapTasks
Key: MAPREDUCE-6664
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6664
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: J.Andreina
Assignee: J.Andreina
1.
As per mapred-default.xml , default value for number of map task per job is 2, but in JobConf#getNumMapTasks() it is 1
{noformat}
<name>mapreduce.job.maps</name>
<value>2</value>
{noformat}
2. Javadoc for getNumMapTasks() is misleading, as it explains about number of reduce task
{code}
/**
* Get configured the number of reduce tasks for this job.
* Defaults to <code>1</code>.
*
* @return the number of reduce tasks for this job.
*/
public int getNumMapTasks() { return getInt(JobContext.NUM_MAPS, 1); }
{code}
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