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In the current milestone (m7), the wrong version of m2e-wtp is downloaded over the M2E marketplace. Version 0.13.0.201103072204 is downloaded, which is imcompatible with m2e m7 and the latest trunk. Please update the link to a newer version (compare with issue https://issues.sonatype.org/browse/MECLIPSEWTP-115)
Updated m2e-wtp version in m2e marketplace to 0.13.0.201105040943.
*** Bug 345221 has been marked as a duplicate of this bug. ***
After updating to m2e-wtp 0.13.0.201105040943, I'm getting the new exception: java.lang.NoSuchMethodError: org.eclipse.m2e.jdt.IClasspathEntryDescriptor.getClasspathEntry()Lorg/eclipse/jdt/core/IClasspathEntry; at org.maven.ide.eclipse.wtp.WebProjectConfiguratorDelegate.configureClasspath(WebProjectConfiguratorDelegate.java:335) at org.maven.ide.eclipse.wtp.WTPProjectConfigurator.configureClasspath(WTPProjectConfigurator.java:94) at org.eclipse.m2e.jdt.internal.DefaultClasspathManagerDelegate.populateClasspath(DefaultClasspathManagerDelegate.java:61) at org.eclipse.m2e.jdt.internal.BuildPathManager.getClasspath(BuildPathManager.java:294) at org.eclipse.m2e.jdt.internal.BuildPathManager.getClasspath(BuildPathManager.java:402) at org.eclipse.m2e.jdt.internal.BuildPathManager.getClasspath(BuildPathManager.java:383) at org.eclipse.m2e.jdt.internal.BuildPathManager.getClasspath(BuildPathManager.java:410) at org.eclipse.m2e.jdt.internal.BuildPathManager.updateClasspath(BuildPathManager.java:229) at org.eclipse.m2e.jdt.internal.BuildPathManager.mavenProjectChanged(BuildPathManager.java:218) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.notifyProjectChangeListeners(ProjectRegistryManager.java:724) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.applyMutableProjectRegistry(ProjectRegistryManager.java:847) at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:280) at org.eclipse.m2e.core.internal.project.ProjectConfigurationManager.updateProjectConfiguration(ProjectConfigurationManager.java:280) at org.eclipse.m2e.core.ui.internal.UpdateConfigurationJob.runInWorkspace(UpdateConfigurationJob.java:87) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
*** Bug 346700 has been marked as a duplicate of this bug. ***
Moved to https://github.com/eclipse-m2e/m2e-core/issues/