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https://issues.apache.org/jira/browse/HADOOP-9489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Nauroth updated HADOOP-9489:
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Attachment: HADOOP-9489.1.patch
Hi, [~cwsteinbach]. I think I understand what's going wrong with fresh imports
of the project, and I'm attaching a patch that attempts to fix it. Would you
mind trying out this patch in your environment to see if it works for you?
Here is a summary of what I did:
# I changed BUILDING.txt to state that m2eclipse is required, that you should
do an mvn install of the whole Hadoop project (not just hadoop-maven-plugins),
and that you should import by clicking File -> Import -> Maven -> Existing
Maven Projects. Once I did it this way, a fresh import showed ~100 errors.
# hadoop-common still had some errors for missing compiled protoc test sources.
This was because the pom.xml was not specifying generated-test-sources/java as
a source directory. I added a call to build-helper-maven-plugin to set that up
correctly. This eliminated ~40 errors for me.
# m2eclipse didn't know how to handle the goals in our custom Maven plugin for
calling protoc and generating version info. I updated the top-level pom.xml to
run the protoc goal during an Eclipse build and ignore the version-info goal.
This eliminated nearly all of the remaining ~60 errors.
After all of that, a fresh import still gives me one error:
{quote}
Project 'hadoop-streaming' is missing required source folder:
'/Users/chris/git/hadoop-common/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/conf'
{quote}
It appears that Eclipse doesn't like us to have a test resource pointing at a
path outside of the module. I'm not yet sure how to fix this one (other than
just copying the file we need out of hadoop-yarn-server-resourcemanager into
hadoop-streaming, but then we'd have a double-maintenance issue). It doesn't
appear to be fatal though.
I'm curious to see if these fixes address all of the problems that you saw.
Thanks!
> Eclipse instructions in BUILDING.txt don't work
> -----------------------------------------------
>
> Key: HADOOP-9489
> URL: https://issues.apache.org/jira/browse/HADOOP-9489
> Project: Hadoop Common
> Issue Type: Bug
> Components: build
> Reporter: Carl Steinbach
> Assignee: Chris Nauroth
> Attachments: eclipse_hadoop_errors.txt, HADOOP-9489.1.patch
>
>
> I have tried several times to import Hadoop trunk into Eclipse following the
> instructions in the BUILDING.txt file, but so far have not been able to get
> it to work.
> If I use a fresh install of Eclipse 4.2.2, Eclipse will complain about an
> undefined M2_REPO environment variable. I discovered that this is defined
> automatically by the M2Eclipse plugin, and think that the BUILDING.txt doc
> should be updated to explain this.
> After installing M2Eclipse I tried importing the code again, and now get over
> 2500 errors related to missing class dependencies. Many of these errors
> correspond to missing classes in the oah*.proto namespace, which makes me
> think that 'mvn eclipse:eclipse' is not triggering protoc.
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