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https://issues.apache.org/jira/browse/HADOOP-5658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12698168#action_12698168
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Philip Zeyliger commented on HADOOP-5658:
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When doing a clean "eclipse-files" ant build, I saw four problems on my way to
getting Eclipse happy.
# Initially the external builder would fail on "contrib/eclipse-plugin". I
hacked around this.
# Then, there were still 237 build problems. (I've attached them in
eclipse-problems.txt, though they're genuinely uninteresting.)
# When reproducing on a Mac, I found that Eclipse would try to run ant with
Java 1.5, which doesn't work for Hadoop.
# When trying to use an svn tree that I'd already checked out, the external
builder would fail to find build.xml.
The patch attached attacks the four problems mentioned above. Specifically:
* The "gridmix2" classpaths are updated so that Eclipse recognize the files to
be in the right package. This solves the 237 build problems. There are also
whitespace changes, which make it easier to diff against the XML files
generated by Eclipse's GUI.
* The "Hadoop_Ant_Builder" custom build task is updated to use Java 1.6, to
use a remote ant process, and to reference ${build_project:build.xml} instead
of a subdirectory of the workspace. Using Java 1.6 for ant is a necessity on
OS X, where Eclipse necessarily is running under Java 1.5. It also
"accidentally" solves the problem for the eclipse-plugin, because its build
rule is no longer triggered. The eclipse-plugin is broken for the current
(Ganymede = 3.4) version of Eclipse, anyway. Finally, using a reference to the
build_project directory makes the Eclipse integration work regardless of where
you place your checkout.
Hudson may complain that this patch contains no tests. I tested this patch
manually on Eclipse on OS X and Linux.
With this patch, there are several tests that "just work" if you right click
and "Run as Junit". There are many others that don't, because of a dependency
on {{test.build.data}}, and a few other properties. (See the target
"test-core" in build.xml.) I'm hoping to get all the tests working in Eclipse,
but that will be a separate JIRA.
I've also tried to add more details to the wiki page at
http://wiki.apache.org/hadoop/EclipseEnvironment.
> Eclipse templates fail out of the box; need updating
> ----------------------------------------------------
>
> Key: HADOOP-5658
> URL: https://issues.apache.org/jira/browse/HADOOP-5658
> Project: Hadoop Core
> Issue Type: Bug
> Components: build
> Environment: Eclipse Ganymede, both on Linux and OS X.
> Reporter: Philip Zeyliger
>
> The Hadoop templates, when run "out of the box" have Eclipse build
> "problems". I've produced a small patch that fixes it.
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