[HADOOP-6391] Classpath should not be part of command line arguments

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.21.0, 0.22.0
• Fix Version/s: 0.21.0
• Component/s: scripts
• Hadoop Flags: Reviewed
• Assignee: Cristian Ivascu
• Reporter: Cristian Ivascu
• Created: 25/Nov/09 14:02
• Updated: 24/Aug/10 20:40
• Resolved: 14/Dec/09 23:47

Description

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

Issue Links

• is part of: HADOOP-6368 hadoop classpath is too long
• relates to: HADOOP-5486 ReliabilityTest does not test lostTrackers, some times.