Maven 2 & 3

Classloader problem loading jars from build extensions

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Blocker Blocker
  • Resolution: Fixed
  • Affects Version/s: 2.0.4
  • Fix Version/s: 2.0.5
  • Component/s: Dependencies
  • Labels:
    None
  • Complexity:
    Intermediate
  • Number of attachments :
    1

Description

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

Issue Links

This issue relates to:
MNG-2225 Classloader problem when adding jars to M2_HOME Critical Closed
This issue is related to:
MNG-2664 Add native support for webdav Major Closed

Activity

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Carlos Sanchez added a comment -

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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Carlos Sanchez added a comment - 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 -

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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John Casey added a comment - 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 -

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

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Carlos Sanchez added a comment - Another worst problem is that it causes the release:prepare to fail too
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Carlos Sanchez added a comment -

New patch with less snapshots

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Carlos Sanchez added a comment - New patch with less snapshots
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Brett Porter added a comment -

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.

Show
Brett Porter added a comment - 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.

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Dates

  • Created:
    Updated:
    Resolved:
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