Branch 1 pipes doesn't work on MR2 clusters
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Key: MAPREDUCE-4090
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4090
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Reporter: Ahmed Radwan
If I compile pipes examples on branch 1:
{code}
ant -Dcompile.c++=yes examples
{code}
And then try to run it on an MR2 cluster, the pipes job hangs forever at map 0%
reduce 0%, I can see in the maps stderr:
{code}
Hadoop Pipes Exception: Illegal text protocol command
{code}
The issue here is that if users have older pipes job, they won't be able to run
it on MR2 (without recompilation). Is this expected or there is something to be
fixed so jobs can be used interchangeably? Or should we document it as an
incompatibility?
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