Hi! Sorry, the documentation does not give any recommendations. The recommended Gradle version for the Gradle JPI Plugin is 1.12. Newer versions will cause problems, the next version will support Gradle 2.2.1.
You have to use Java 7 since Java 8 also causes problems ( https://issues.jenkins-ci.org/browse/JENKINS-25643). If you want to share your plugin with other users, you should probably stick to JDK6 since that's the minimum version supported by Jenkins, see https://wiki.jenkins-ci.org/display/JENKINS/Java+5+Compatibility. Jenkins will provide a Groovy runtime for plugins (which is currently 1.8.9), you should use that version to avoid problems. It's added to the dependencies automatically by the Gradle JPI plugin. Daniel On Mon, Jan 5, 2015 at 8:57 PM, Thomas Goeppel <[email protected]> wrote: > Hello developers community! > > I'd like to experiment with Jenkins plugins written in Groovy, and to get > started I'm trying to build a Groovy Jenkins plugin demo from Shiran > Rubin's talk at the 2014 Jenkins conference in Israel (video > <https://www.youtube.com/watch?v=h_epgCWJ8lE>, slides > <https://www.cloudbees.com/sites/default/files/juc_presentation.pdf>, my fork > of the github-repository <https://github.com/TG9541/frogballs-plugin>). > > The build fails with the following error message: > > > :compileGroovy > :processResources UP-TO-DATE > :classes > :jpi FAILED > > FAILURE: Build failed with an exception. > > * What went wrong: > Execution failed for task ':jpi'. > > java/util/HashMap$Entry > > * Try: > Run with --stacktrace option to get the stack trace. Run with --info or > --debug > option to get more log output. > > BUILD FAILED > > I'm using Ubuntu 14.04, and since I couldn't find tool version > requirements, I installed most things from packages. > > "gradle -version" prints the following versions: > ------------------------------------------------------------ > Gradle 1.4 > ------------------------------------------------------------ > > Gradle build time: Monday, September 9, 2013 8:44:25 PM UTC > Groovy: 1.8.6 > Ant: Apache Ant(TM) version 1.9.3 compiled on April 8 2014 > JVM: 1.7.0_65 (Oracle Corporation 24.65-b04) > OS: Linux 3.13.0-44-generic amd64 > > > I tried the following, without seeing the error message change: > > > - build with the "--debug" option, and Gradle prior to 2.0 had issues > with Java1.8 > > <http://forums.gradle.org/gradle/topics/gradle_fails_on_jdk8_with_java_lang_classnotfoundexception_java_util_hashmap_entry> > -> I downgraded to Java/JDK1.7 * changed the gradle-jpi-plugin dependency > from version 0.5.0 to 0.7.2 > - used the dependencies I found in the job-dsl-plugin > <https://github.com/jenkinsci/job-dsl-plugin/blob/master/build.gradle> > (e.g. "gradleVersion = '1.12'") > > > A generally recommendation in the Gradle forums is upgrading Gradle, and > Groovy, to version 2.x. I do that, since it's not clear to me how the > Groovy version used in Jenkins relates to the version used by the build > tools (e.g. version of groovyc in the environment). > > It would be nice if someone with more experience could have a look at it, > and could shed some light on the Groovy version tool/build dependencies! > > Thanks in advance! > > -- > You received this message because you are subscribed to the Google Groups > "Jenkins Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-dev/2092c5b5-1d1d-475e-a251-c0d690720601%40googlegroups.com > <https://groups.google.com/d/msgid/jenkinsci-dev/2092c5b5-1d1d-475e-a251-c0d690720601%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Jenkins Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-dev/CAKqW32Dbq736HQEKtbg5tCvDq4%3DUKL3JsTevcbO8sA%2Bt%3DzPTHA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
