[#MNG-2228] Classloader problem loading jars from build extensions

Maven 2

Classloader problem loading jars from build extensions

Created: 14/Apr/06 06:10 PM Updated: 25/Jan/07 11:26 PM

Component/s:

Dependencies

Affects Version/s:

2.0.4

Fix Version/s:

2.0.5

Time Tracking:

Not Specified

File Attachments:

MNG-2228.tgz (2 kB)

Issue Links:

Related

This issue relates to:

~~MNG-2225~~ Classloader problem when adding jars to M2_HOME

This issue is related to:

~~MNG-2664~~ Add native support for webdav

Complexity:

Intermediate

Description

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When running "mvn install" and "mvn testwagonscm:test" in the attached test case you get a ClassCastException although the Class to assign to and the assigned one are the same. The problem seems to be that they come from different classloaders. This problem makes the project-info-report:scm goal fail.

Same as ~~MNG-2225~~, but using build extensions instead of jars in M2_HOME

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Carlos Sanchez added a comment - 26/Apr/06 05:22 PM

This breaks generation of site when wagon-scm is in the build extensions, eg. to deploy the site to svn or cvs for Collabnet (dev.java.net)

When running site Maven tries always to instantiate projec-info-report mojos before checking in the pom for "exclude default reports" option.

The only way to generate the site was install the project-info-report plugin after removing the class ScmReport. It has to go under the same groupId, org.apache.maven.plugins, which makes it a real hack

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John Casey added a comment - 22/Jun/06 03:18 PM

This would require some heavy refactoring to introduce a new way to manage artifacts in the core classloader during the resolution process. See ~~MNG-2225~~ for more information.

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Carlos Sanchez added a comment - 28/Nov/06 07:19 PM

Another worst problem is that it causes the release:prepare to fail too

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Carlos Sanchez added a comment - 28/Nov/06 07:20 PM

New patch with less snapshots

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Brett Porter added a comment - 31/Dec/06 12:19 AM

this caused some problems with the release plugin because jdom was in the root container (via wagon-webdav), but jaxen was not (because it is optional, so it was not caught by the resolution I added).

I have an alternate solution putting extensions in a child container like plugins which is working. I will clean up and commit tomorrow.

This could be reviewed and handled differently for trunk given the changes to plexus and classworlds. I'll examine that separately.