Hi everyone,
 
I am having trouble using the new Eclipse Luna 4.4 SR1 with my m2e plugins. The thing is that when I am saving a JSP file (or whatever) followed by a project  build (Project > Build
 Project), eclipse raised an exception that I really don’t unterstand. It happens when I am copying files from one project to another too.
 
I’ve searched for hours but I didn’t fight the right answer of my questions in the web so I thought you guys could help me.
 
Here is the stack trace of the exception I am fighting with :
 
« Message : Errors running builder 'Maven Project Builder' on project 'efluid-webapp'.
!ENTRY org.eclipse.core.resources 4 2 2014-10-23 11:26:54.575
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
        at java.lang.StringBuilder.<init>(Unknown Source)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.formatMessage(BuildProblemInfo.java:27)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.<init>(BuildProblemInfo.java:23)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.processBuildResults(MavenBuilderImpl.java:312)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:174)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
        at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
        at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)
        at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
 
!ENTRY org.eclipse.core.resources 4 75 2014-10-23 11:26:54.577
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.m2e.core 4 75 2014-10-23 11:26:54.577
!MESSAGE Errors running builder 'Maven Project Builder' on project 'efluid-webapp'.
!STACK 0
java.lang.NullPointerException
        at java.lang.StringBuilder.<init>(Unknown Source)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.formatMessage(BuildProblemInfo.java:27)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.<init>(BuildProblemInfo.java:23)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.processBuildResults(MavenBuilderImpl.java:312)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:174)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
        at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
        at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)
        at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
 
!ENTRY org.eclipse.core.resources 4 2 2014-10-23 11:27:34.585
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
        at java.lang.StringBuilder.<init>(Unknown Source)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.formatMessage(BuildProblemInfo.java:27)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.<init>(BuildProblemInfo.java:23)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.processBuildResults(MavenBuilderImpl.java:312)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:174)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
        at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
        at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)
        at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
 
!ENTRY org.eclipse.core.resources 4 75 2014-10-23 11:27:34.600
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.m2e.core 4 75 2014-10-23 11:27:34.600
!MESSAGE Errors running builder 'Maven Project Builder' on project 'efluid-webapp'.
!STACK 0
java.lang.NullPointerException
        at java.lang.StringBuilder.<init>(Unknown Source)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.formatMessage(BuildProblemInfo.java:27)
        at org.eclipse.m2e.core.internal.builder.BuildProblemInfo.<init>(BuildProblemInfo.java:23)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.processBuildResults(MavenBuilderImpl.java:312)
        at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:174)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
        at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:496)
        at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:405)
        at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:180)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54) »
               
 
Let me give you a little summary of the m2e plugins present in my eclipse :
 
| 
Name of the plugin | 
Version | 
| 
m2e - Maven Integration for Eclipse | 
v. 1.6.0.20140819-1152 | 
| 
m2e - slf4j over logback logging | 
v. 1.6.0.20140819-1152 | 
| 
m2e connector for build-helper-maven-plugin
(PROBLEM HERE ?)   | 
v. 0.15.0.201207090124 | 
| 
Maven Integration for Eclipse JDT APT (m2e-apt) | 
v. 1.1.1.201409241934 | 
 
And my computer settings :
Eclipse.version=Eclipse Luna 4.4.1
java.version=1.7.0_45
java.vendor=Sun Microsystems Inc.
 
I apologize in advance if I am using the wrong mailing list. Please tell me if so. Plus I apologize for my English if I made some mistakes.
 
Thanks
-Julien