Consider splitting homedir between mapred and hdfs users?
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Key: BIGTOP-456
URL: https://issues.apache.org/jira/browse/BIGTOP-456
Project: Bigtop
Issue Type: Improvement
Components: General
Affects Versions: 0.1.0
Environment: RPMs
Reporter: Harsh J
Priority: Minor
Both "mapred" and "hdfs" users have the same home dir.
A user reported having some problems with their config management system
overwriting the "mapred" user permissions of the PID directory (Which is also
its homedir) with those of the "hdfs" user (Same homedir as "mapred" user),
which causes the tasktracker process to fail to start, since it now cannot
write to the PID dir.
Although the config system can be fixed not to do that, if both users had
separate home dirs, this would not have been a problem, and the separation
would have only been logical.
I think after the username separation Hadoop has had in packaging terms, the
homedir split does make sense.
Its just 1/0.22 versions of Hadoop and their packages that could be affected by
this.
Presently, for 0.23+, I think we have /var/run/hadoop/ for all things HDFS
(Should we rename?) and /var/run/yarn/ for all things MapReduce2 which makes
sense and should be good enough.
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