[HBASE-7637] hbase-hadoop1-compat conflicts with -Dhadoop.profile=2.0

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.95.2
• Fix Version/s: 0.95.0
• Component/s: build
• Hadoop Flags: Reviewed
• Assignee: Elliott Neil Clark
• Reporter: Nicolas Liochon
• Created: 21/Jan/13 18:02
• Updated: 23/Sep/13 18:31
• Resolved: 23/Jan/13 23:46

Description

I'm unclear on the root cause / fix. Here is the scenario:

mvn clean package install -Dhadoop.profile=2.0 -DskipTests
bin/start-hbase.sh

fails with

Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.metrics2.lib.MetricMutable
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

doing

rm -rf hbase-hadoop1-compat/target/

makes it work.

In the pom.xml, we never reference hadoop2-compat. But doing so does not help: hadoop1-compat is compiled and takes precedence over hadoop2...