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Date: Fri, 7 Oct 2011 03:58:29 +0000 (UTC)
From: "Tim Broberg (Created) (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Created] (HADOOP-7726) eclipse plugin does not build with
 0.20.205
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eclipse plugin does not build with 0.20.205
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                 Key: HADOOP-7726
                 URL: https://issues.apache.org/jira/browse/HADOOP-7726
             Project: Hadoop Common
          Issue Type: Bug
          Components: contrib/eclipse-plugin
    Affects Versions: 0.24.0
         Environment: Fedora 15
            Reporter: Tim Broberg


I'm new to hadoop, java, and eclipse, so please forgive me if I jumble multiple issues together or mistake the symptoms of one problem for a separate issue.

Attempting to follow the build instructions from http://wiki.apache.org/hadoop/EclipseEnvironment, the following commands are to be executed:

  1 - mvn test -DskipTests
  2 - mvn eclipse:eclipse -DdownloadSources=true -DdownloadJavadocs=true
  3 - cd hdfs; ant compile eclipse
  4 - cd ../; cd mapreduce; ant compile eclipse

A - If "mvn test -DskipTests" is used for #1, #2 fails with "[ERROR] Failed to execute goal on project hadoop-yarn-common: Could not resolve dependencies for project org.apache.hadoop:hadoop-yarn-common:jar:0.24.0-SNAPSHOT:"

Per Luke Lu's suggestion, "mvn install -DskipTests -P-cbuild" instead of step #1 cleared up this issue.

B - For steps #3, and #4 there are no hdfs or mapreduce subdirectories. These appear to have been renamed "hadoop-hdfs-project" and "hadoop-mapreduce-project".

C - For step #3, if I then go to hadoop-hdfs-project instead and perform "ant compile eclipse" no build.xml file is found - "Buildfile: build.xml does not exist!"

D - For step #4, if I go to hadoop-mapreduce-project and do "ant compile eclipse" a set of errors much like #A is produced:

> [ivy:resolve]           ::::::::::::::::::::::::::::::::::::::::::::::
> [ivy:resolve]           ::          UNRESOLVED DEPENDENCIES         ::
> [ivy:resolve]           ::::::::::::::::::::::::::::::::::::::::::::::
> [ivy:resolve]           ::
> org.apache.hadoop#hadoop-yarn-server-common;0.24.0-SNAPSHOT: not found
> [ivy:resolve]           ::
> org.apache.hadoop#hadoop-mapreduce-client-core;0.24.0-SNAPSHOT: not found
> [ivy:resolve]           ::
> org.apache.hadoop#hadoop-yarn-common;0.24.0-SNAPSHOT: not found
> [ivy:resolve]           ::::::::::::::::::::::::::::::::::::::::::::::

E - If I ignore these issues and import the projects generated in step #2, I get a bunch of errors related to the lack of an M2_REPO definition. Adding this variable needs to be included in the build scripts or documentation in the wiki.

F - Once that is resolved, eclipse shows hundreds of errors and warnings starting with "AvroRecord" cannot be resolved to a type.

Thanks so much for your work on this, but it needs a little more effort in documentation and/or development before it is usable again.

Thanks.

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