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From "Elek, Marton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15065) Make mapreduce specific GenericOptionsParser arguments optional
Date Wed, 22 Nov 2017 17:13:01 GMT
Elek, Marton created HADOOP-15065:

             Summary: Make mapreduce specific GenericOptionsParser arguments optional
                 Key: HADOOP-15065
                 URL: https://issues.apache.org/jira/browse/HADOOP-15065
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Elek, Marton
            Priority: Minor

org.apache.hadoop.util.GenericOptionsParser is widely used to use common arguments in all
the command line applications.

Some of the common arguments are really generic:

-D <property=value>               define a value for a given property
-fs <file:///|hdfs://namenode:port> specify default filesystem URL to use, overrides
'fs.defaultFS' property from configurations.
-libjars <jar1,...>               specify a comma-separated list of jar files to be
included in the classpath

But some are mapreduce specific:

-jt <local|resourcemanager:port>  specify a ResourceManager
-archives <archive1,...>          specify a comma-separated list of archives to be unarchived
on the compute machines

In the review of HDFS-12588 it was suggested to remove/turn off the mapreduce specific arguments
if they are not required (for example in case of starting namenode or datanode). 

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