maven-2 build conflicts hudson/jenkins

I have 2 builds of the same project on the same Hudson/Jenkins server (they are running different build profil开发者_如何学运维es). The both build when polling SCM, but I sometimes get the following error:

The plugin 'org.apache.maven.plugins:maven-checkstyle-plugin' does not exist or no valid version could be found

This only started once I added the second build, so I'm assuming there is some sort of conflict. Does anyone know what's going on here?

thanks, Jeff

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Are your builds running at the same time, with the same Maven instance and the same local Maven repository? If so, then maybe you run into a filelock on that plugin jar. I have the same problem here, if two jobs are accessing the same Maven artifact at the same time, they fail, because Maven can't handle that. I solved that with two Maven instances, with a separate local repository. It could also help, if you set the VCS polling of the second job a minute after the first job.