When a subversion job is created that contains externals other than on the root
path, they are checked out properly, but, the revisions for those externals are
not, and exceptions are thrown out in the console during update.

An example, project A
/A/trunk/import/thirdparty has svn:externals set to bring down junit as
http://svn/....../junit/jar/

when the SubversionUpdateEventHandler captures this as an
SVNEventAction.UPDATE_EXTERNAL action, it uses the ModulePath to prepend the
path of the external... which would be trunk/junit as opposed to using the path
of the item that has the external, which would be trunk/import/thirdparty/junit.

this is visible in the svnexternals.txt file as well as the stack trace output
during buildtime console output.

"ERROR: Failed to parse svn info for external http://svn/basic/lib/junit at
trunk/import/junit
org.tmatesoft.svn.core.SVNException: svn:
'C:\Users\seymore\.hudson\jobs\services.core\workspace\trunk\import' is not a
working copy
svn: Cannot read from to
'C:\Users\seymore\.hudson\jobs\services.core\workspace\trunk\import\.svn\format':
path refers to directory or read access is denied
at
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:55)
at
org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:40)
at
org.tmatesoft.svn.core.internal.wc.admin.SVNAdminAreaFactory.open(SVNAdminAreaFactory.java:132)
at
org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.doOpen(SVNWCAccess.java:344)
at org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.open(SVNWCAccess.java:261)
at
org.tmatesoft.svn.core.internal.wc.admin.SVNWCAccess.probeOpen(SVNWCAccess.java:279)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:1915)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:1852)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2206)
at hudson.scm.SubversionSCM$BuildRevisionMapTask.invoke(SubversionSCM.java:630)
at hudson.scm.SubversionSCM$BuildRevisionMapTask.invoke(SubversionSCM.java:600)
at hudson.FilePath.act(FilePath.java:312)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:307)
at hudson.model.AbstractProject.checkout(AbstractProject.java:566)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:244)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:218)
at hudson.model.Run.run(Run.java:749)
at hudson.model.Build.run(Build.java:102)
at hudson.model.ResourceController.execute(ResourceController.java:70)
at hudson.model.Executor.run(Executor.java:71)"

the paths are a little different in the stack trace, but its the same problem.
In the stack trace trunk/import/junit is actually stored under
trunk/server/lib/import/junit .. the directory import has the external set to
make junit a child. svnexternals.txt has it stored as trunk/import/junit