Pig launcher script would benefit from exec'ing hadoop instead of java (in
cases where Hadoop is available)
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Key: PIG-2383
URL: https://issues.apache.org/jira/browse/PIG-2383
Project: Pig
Issue Type: Improvement
Components: grunt
Affects Versions: 0.9.0, 0.8.1, 0.8.0
Reporter: Roman Shaposhnik
Priority: Minor
It seems that pig launcher script needs to replicate a lot of hadoop launcher
script functionality if it wants to set things like java library path and
classpath just right. Currently users are burdened with the need to do it
manually even when all the appropriate setting are available for Hadoop. For
instance, in order for the following to succeed, Pig has to be explicitly told
about lzo libs (PIG_OPTS="$PIG_OPTS
-Djava.library.path=..path..to.hadoop..native..libs"
{noformat}
E = LOAD 'foo.txt.lzo' USING PigStorage() as (a:int);
DUMP E;
{noformat}
The suggestion is to follow the trend set by Hive and use hadoop launcher
script instead of Java. If the Hadoop launcher script is not available we can
alway fall back on the default behavior.
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