the same happens with me, is this normal?

so, running the import on the ssh -p port localhost groovysh i get:

groovy:000> import hudson.scm.SubversionSCM
groovy:000> ERROR java.lang.IncompatibleClassChangeError:
the number of constructors during runtime and compile time for java.lang.Exception do not match. Expected 5 but got 4
at java_lang_Runnable$run.call (Unknown Source)
at hudson.cli.GroovyshCommand.main (GroovyshCommand.java:70)
at org.jenkinsci.main.modules.sshd.CLICommandAdapter$1.run (CLICommandAdapter.java:34)
at org.jenkinsci.main.modules.sshd.AsynchronousCommand$1.run (AsynchronousCommand.java:104)

actually, this also happens when I do just a purge:

–
fenix-ashes:~/JenkinsSVNScripts# ssh -p 1414 jenkins@localhost groovysh
Groovy Shell (1.8.5, JVM: 1.6.0_22)
Type 'help' or '\h' for help.
-------------------------------------------------------------------------------
groovy:000> purge
groovy:000> ERROR java.lang.IncompatibleClassChangeError:
the number of constructors during runtime and compile time for java.lang.Exception do not match. Expected 5 but got 4
at java_lang_Runnable$run.call (Unknown Source)
at hudson.cli.GroovyshCommand.main (GroovyshCommand.java:70)
at org.jenkinsci.main.modules.sshd.CLICommandAdapter$1.run (CLICommandAdapter.java:34)
at org.jenkinsci.main.modules.sshd.AsynchronousCommand$1.run (AsynchronousCommand.java:104)
–

so, according to http://stackoverflow.com/questions/7826967/geb-incompatibleclasschangeerror Java 7 seems to be the issue.. I'm thinking on recompilink jenkins with Java 7

ok, so, I was running jenkins with Java 6, switched to run it with Java 7, and the purge now works, but the import gives me the error:

groovy:000> import jenkins.scm.SubversionSCM
ERROR org.codehaus.groovy.tools.shell.CommandException:
Invalid import definition: 'import jenkins.scm.SubversionSCM'; reason: startup failed:
script13432436404381481316699.groovy: 1: unable to resolve class jenkins.scm.SubversionSCM
@ line 1, column 1.
import jenkins.scm.SubversionSCM
^

1 error

Apparently, Hudson's community found the error, and corrected it already: http://issues.hudson-ci.org/browse/HUDSON-6068 - trying to do the same in jenkins now

Nicolas: We had the same problem, but for differente environments of Groovy, you are using it through the groovy-post-build, I was using it through the SSH CLI groovysh. I solved this for my case, and will make a pull request (basicly you have to change the classloader to use the uberClassLoader. I attained it with the following diff:

• final ClassLoader cl = Thread.currentThread().getContextClassLoader();
  +final ClassLoader cl = Jenkins.getInstance().getPluginManager().uberClassLoader == null ? Thread.currentThread()
  + .getContextClassLoader() : Jenkins.getInstance().getPluginManager().uberClassLoader;

)
You just have to do the same to the classloader on the Groovy interpreter in groovy-postbuild. If I find some extra time, I'll try to fix that plugin and make a pull request, but no promises (it should be straightforward though if you have some experience with java and git.

FYI - JENKINS-6068 is the issue in this JIRA instance.

so, it means that this issue is resolved, right? so I guess we should close it. My problem was actually a bit different, it was the behaviour/origin, but with the SSH command groovysh, I created a new issue, JENKINS-14982, corrected it on my git repo and made a pull request https://github.com/jenkinsci/jenkins/pull/550

https://github.com/jenkinsci/groovy-postbuild-plugin/pull/18

Code changed in jenkins
User: ikedam
Path:
src/test/java/org/jvnet/hudson/plugins/groovypostbuild/GroovyPostbuildRecorderTest.java
src/test/resources/plugins/dependee.hpi
http://jenkins-ci.org/commit/groovy-postbuild-plugin/1a77ddbb4d5fe20f05d4b0d7559cc62daa8a52fe
Log:
JENKINS-14154 Added a test to demonstrate JENKINS-14154.

Code changed in jenkins
User: ikedam
Path:
src/main/java/org/jvnet/hudson/plugins/groovypostbuild/GroovyPostbuildRecorder.java
http://jenkins-ci.org/commit/groovy-postbuild-plugin/fd22c9c5fe345cba0f356441811312509c97a908
Log:
[FIXED JENKINS-14154] Allows to access other plugins.

Code changed in jenkins
User: ikedam
Path:
src/main/java/org/jvnet/hudson/plugins/groovypostbuild/GroovyPostbuildRecorder.java
src/test/java/org/jvnet/hudson/plugins/groovypostbuild/GroovyPostbuildRecorderTest.java
src/test/resources/plugins/dependee.hpi
http://jenkins-ci.org/commit/groovy-postbuild-plugin/dac19b7d590df830a94019871eee1ed6f9322e9c
Log:
Merge pull request #18 from ikedam/feature/JENKINS-14154_AccessAllPlugins

JENKINS-14154 Allow to access to other plugins

Compare: https://github.com/jenkinsci/groovy-postbuild-plugin/compare/9d4982d1bc70...dac19b7d590d

Fixed in 2.1.
It will be available in a day.