Most of the mahout tests can't be executed out-of-the box
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Key: BIGTOP-259
URL: https://issues.apache.org/jira/browse/BIGTOP-259
Project: Bigtop
Issue Type: Bug
Components: General
Affects Versions: 0.2.0
Reporter: Roman Shaposhnik
Assignee: Roman Shaposhnik
Fix For: 0.3.0
Here's what the problem looks like:
Error: java.lang.ClassNotFoundException: org.apache.mahout.math.Vector
First the good news: it is fixed upstream: MAHOUT-680. The root cause of the
problem is the fact that /usr/lib/mahout/bin/mahout constructs HADOOP_CLASSPATH
in such a way that it puts mahout-examples-0.5-job.jar *after*
mahout-core-0.5-job.jar. That trips up job submission code into putting
mahout-core-0.5-job.jar into distributed cache instead of
mahout-examples-0.5-job.jar (which has the missing class definitions).
A proposed workaround to sustain us for as long as MAHOUT-680 hasn't been put
into any release yet is to manually initialize HADOOP_CLASSPATH with
mahout-examples-0.5-job.jar at the level of /usr/bin/mahout. This is ugly but
it works.
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