Parallel build is not threadsafe

[elharo]

[WARNING] *****************************************************************
[WARNING] * Your build is requesting parallel execution, but project *
[WARNING] * contains the following plugin(s) that have goals not marked *
[WARNING] * as @threadsafe to support parallel building. *
[WARNING] * While this /may/ work fine, please look for plugin updates *
[WARNING] * and/or request plugins be made thread-safe. *
[WARNING] * If reporting an issue, report it against the plugin in *
[WARNING] * question, not against maven-core *
[WARNING] *****************************************************************
[WARNING] The following plugins are not marked @threadsafe in Google App Engine extensions to the Google OAuth Client Library for Java.:
[WARNING] org.codehaus.mojo:clirr-maven-plugin:2.8
[WARNING] org.apache.maven.plugins:maven-project-info-reports-plugin:3.0.0
[WARNING] Enable debug to see more precisely which goals are not marked @threadsafe.
[WARNING] *****************************************************************

[ksatwara]

@elharo I tested it many times but didn't find that warning message. Moreover I research on that plugins org.codehaus.mojo:clirr-maven-plugin:2.8 is thread safe and updated with latest version. you can find the link here. https://www.mojohaus.org/clirr-maven-plugin/apidocs/org/codehaus/mojo/clirr/HelpMojo.html. More over org.apache.maven.plugins:maven-project-info-reports-plugin:3.0.0 is also latest updated plugin of maven for report generation. still you find the issue please describe here with more description and clarification.