debugging hint for Jenkins builds when getting failures in maven-invoker-plugin

[Marshall Schor <ms...@schor.com>]

Some of our projects build maven plugins, and then test them using "Integration
Tests".

These load a temporary local-repository with maven artifacts, and run the plugin
in that temporary environment. The plugin running generates a log, in
target/it/[your-test-maven-project-using-the-plugin]/build.log.

When this build fails, you get an error message in Jenkins that says

[INFO] Building: simple/pom.xml
[INFO] ..FAILED (6.1 s)
[INFO]   The build exited with code 1. See /home/jenkins/jenkins-slave/workspace/UIMA-v3-sdk/jcasgen-maven-plugin/target/it/simple/build.log for details.

The 3rd line of this message hasn't been updated to reflect how to see this in our Apache build configuration.  The way to see this is via a browser pointed to 

https://builds.apache.org/job/[the-job-name, e.g. UIMA-v3-sdk]/ws/

That is, just go to the main build in Jenkins, and then add "/ws" to get the workspace.  Following that you can then add subdirectories like target/it/ etc.

-Marshall