Chuan Liu created MAPREDUCE-4374:
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Summary: Fix child task environment variable config and add
support for Windows
Key: MAPREDUCE-4374
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4374
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 1-win
Reporter: Chuan Liu
Priority: Minor
In HADOOP-2838, a new feature was introduced to set environment variables via
the Hadoop config 'mapred.child.env' for child tasks. There are some further
fixes and improvements around this feature, e.g. HADOOP-5981 were a bug fix;
MAPREDUCE-478 broke the config into 'mapred.map.child.env' and
'mapred.reduce.child.env'. However the current implementation is still not
complete. It does not match its documentation or original intend as I believe.
Also, by using ‘:’ (colon) and ‘;’ (semicolon) in the configuration syntax, we
will have problems using them on Windows because ‘:’ appears very often in
Windows path as in “C:\”, and environment variables are used very often to hold
path names. The Jira is created to fix the problem and provide support on
Windows.
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