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https://issues.apache.org/jira/browse/MAPREDUCE-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved MAPREDUCE-4090.
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Resolution: Won't Fix
It is expected to require recompilation if not outright code changes on major
version upgrades. This is documented in the Hadoop Compatibility Guide.
Closing as won't fix.
> Branch 1 pipes doesn't work on MR2 clusters
> -------------------------------------------
>
> Key: MAPREDUCE-4090
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4090
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv1, mrv2, pipes
> Affects Versions: 0.23.1, 1.0.1
> 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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