jenkinsci/svnmerge-plugin — pull request #20 by alexouzounis (2014-11-10 15:30:53+00:00)
Title: IntegrateAction should not depend on SubversionTagAction

SubversionTagAction contains the URL as returned from the svn info command. This URL can be different from the one used in Jenkins in the Project's SubversionSCM ModuleLocation and therefore we might end up never finding a valid URL.
Example: SVN URL is defined to start with svn.company.com/ where svn.company.com is defined in the hosts file of each slave to point to the SVN mirror closest to it. With the current approach of comparing svn info command's URL with the ModuleLocation URL we will never produce a match and therefore not able to integrate upstream.

Instead, use the URL from the ModuleLocation and the revision from the SVN_REVISION variable of the build in question.