NoSuchMethodError when using m2e snapshot version 2.4.300.20240204-1616

[papegaaij]

We are having issues with missing file in our builds and therefore switched to a snapshot version of m2e, which contains a fix for this. However, since a few days, this version of m2e has become incompatible with Groovy-Eclipse. I've traced the cause of the error to this change in m2e: eclipse-m2e/m2e-core@60e66ff#diff-d508f90e90eb0690e45ca9862654e04141c34013525229cf1fa13162347909d5L867

The signature of the getFolder method has changed. This now results in the exception below. I'm not sure how you plan to deal with this, but I guess it is very likely that this change will make it into Eclipse 2024-03.

java.lang.NoSuchMethodError: 'org.eclipse.core.resources.IFolder org.codehaus.groovy.m2eclipse.GroovyProjectConfigurator.getFolder(org.eclipse.core.resources.IProject, java.lang.String)'
	at org.codehaus.groovy.m2eclipse.GroovyProjectConfigurator.configureRawClasspath(GroovyProjectConfigurator.java:111)
	at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.invokeJavaProjectConfigurators(AbstractJavaProjectConfigurator.java:220)
	at org.eclipse.m2e.jdt.internal.AbstractJavaProjectConfigurator.configure(AbstractJavaProjectConfigurator.java:178)
	at org.codehaus.groovy.m2eclipse.GroovyProjectConfigurator.configure(GroovyProjectConfigurator.java:53)
	at org.eclipse.m2e.core.project.configurator.AbstractLifecycleMapping.configure(AbstractLifecycleMapping.java:123)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.lambda$6(ProjectConfigurationManager.java:503)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:402)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:283)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:497)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.lambda$4(ProjectConfigurationManager.java:425)
	at java.base/java.util.Collection.removeIf(Collection.java:576)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration0(ProjectConfigurationManager.java:413)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.lambda$3(ProjectConfigurationManager.java:339)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:402)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:283)
	at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:222)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1097)
	at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:338)
	at org.eclipse.m2e.core.ui.internal.UpdateMavenProjectJob.runInWorkspace(UpdateMavenProjectJob.java:80)
	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:43)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

[eric-milles]

Groovy Maven configurator delegates to the Java Maven configurator and then adds Groovy-specific configuration. I reworked it to use much less of the Java component's interface (since it is internal).

You can build just the org.codehaus.groovy.m2eclipse plugin and add it to your dropins folder to test. I'll deploy a new snapshot in the next few days.

[papegaaij]

That's great news. I'll wait until the new snapshot is available. For now, we're working with a snapshot build of m2e a couple of days old, which does not yet have the change.

[cquoss]

When will this reach GA?
Because right now in eclipse 2023/12 i also face this issue.

[eric-milles]

You can get it in a snapshot build today. The next release is March 31st.