Gera Shegalov created MAPREDUCE-5814:
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Summary: fat jar with *-default.xml may fail when
mapreduce.job.classloader=true.
Key: MAPREDUCE-5814
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5814
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 2.3.0
Reporter: Gera Shegalov
We faced a failure when a job.jar compiled against 0.20+ hadoop artifacts had
to run with {{mapreduce.job.classloader=true}} because it needed a more recent
guava as a dependency. The job failed because the cluster's {{*-default.xml}}
files were overshadowed by the ones in the fat jar. We propose to treat these
default config files like the system packages {{org.apache.hadoop.}} to avoid a
counterintuitivie behavior as if we had {{mapreduce.job.user.classpath.first}}
set.
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