Hmmmm, I'm quite sure I've seen this issue in one of the plug-ins I maintain (guess it was NUnit?), so I'm not surprised to recognise the bug. Thanks for reporting, stay tuned as I'll try to start a dev cycle on the plug-in in the next days.

I'm not a Java-developer, but if you show me how this is done in another plugin, then I can do the grunt-work of actually writing it, so you just have a pull-request on github to review.

Code changed in jenkins
User: Bruno P. Kinoshita
Path:
src/main/java/org/tap4j/plugin/TapPublisher.java
http://jenkins-ci.org/commit/tap-plugin/4343691e0f23e612c3639033262521da419592e3
Log:
[FIXED JENKINS-29650] Don't use a build step synchronization, defaulting to NONE.

Hi Matthias. I think I remembered what was the problem. It was the required synchronization in Jenkins. At the moment, we have a build step, which means the publisher in the plug-in runs after the build step in the previous build has been executed.

Let me know if that fixes your issue.

I need to dig deeper into Jenkins API and thoroughly understand the required build monitor service, as well as checkpoints :o) but hopefully that will fix your issue for now.

Thanks for reporting
Bruno

From what I understand, this should fix the problem. Can you tell me how I can test this? So far, I only installed plugins through the jenkins-plugin UI.

Do I need to compile the plugin into a hpi or jar or something like that?
if so, how is that done?

Can I just edit the files on disk and restart jenkins?
where would the files be?

Sorry for the noobish questions and thanks for your work!

I managed to compile the plugin from source and installed the resulting hpi into our jenkins-instance. I will let this run for a week and tell you if I can still observe problems.

After a few tests with low concurrency, I did find no ovbious error.

After a bit more than a week of real-life testing, I did not encounter the error againg.

I am looking forward to the next release so that I can switch back to the normal version.