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Posted to common-dev@hadoop.apache.org by "Cristian Ivascu (JIRA)" <ji...@apache.org> on 2009/11/25 15:02:39 UTC

[jira] Created: (HADOOP-6391) Classpath should not be part of command line arguments

Classpath should not be part of command line arguments
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                 Key: HADOOP-6391
                 URL: https://issues.apache.org/jira/browse/HADOOP-6391
             Project: Hadoop Common
          Issue Type: Bug
          Components: scripts
            Reporter: Cristian Ivascu


Because bin/hadoop and bin/hdfs put the entire CLASSPATH in the command line arguments, it exceeds 4096 bytes, which is the maximum size that ps (or /proc) can work with. This makes looking for the processes difficult, since the output gets truncated for all components at the same point (e.g. NameNode, SecondaryNameNode, DataNode). 

The mapred sub-project does not have this problem, because it calls "export CLASSPATH" before the final exec. bin/hadoop and bin/hdfs should do the same thing

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