Not sure exactly when it happens, but multiple forked lifecycles (?) can...

Not sure exactly when it happens, but multiple forked lifecycles (?) can result in calling this method multiple times.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@34831 71c3de6d-444a-0410-be80-ed276b4c234a

maven-plugin/src/main/java/hudson/maven/MavenBuild.java

@@ -433,7 +433,7 @@ public class MavenBuild extends AbstractMavenBuild<MavenModule,MavenBuild> {
             if(result==null)
                 setResult(Result.SUCCESS);
             onEndBuilding();
-            duration = System.currentTimeMillis()- startTime;
+            duration += System.currentTimeMillis()- startTime;
             parentBuild.notifyModuleBuild(MavenBuild.this);
             try {
                 listener.setSideOutputStream(null);