Make shim for Hadoop 0.20 and 0.23 support dynamic
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Key: PIG-2388
URL: https://issues.apache.org/jira/browse/PIG-2388
Project: Pig
Issue Type: Improvement
Affects Versions: 0.10, 0.9.2
Reporter: Thomas Weise
Assignee: Thomas Weise
Fix For: 0.10, 0.9.2
We need a single Pig installation that works with both Hadoop versions. The
current shim implementation assumes different builds for each version. We can
solve this statically through internal build/installation system or by making
the shim dynamic so that pig.jar will work on both version with runtime
detection. Attached patch is to convert the static shims into a shim interface
with 2 implementations, each of which will be compiled against the respective
Hadoop version and included into single pig.jar (similar to what Hive does).
The default build behavior remains unchanged, only the shim for
${hadoopversion} will be compiled. Both shims can be built via: ant
-Dbuild-all-shims=true
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