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Created attachment 261787 [details] Trace 1 I noticed the problem in I20160516-2000 but it could have started a few I-builds ago. Never saw that before. The attached file is a trace log from my main dev workspace where the only thing I did was to open Eclipse and then close Eclipse. The log is gathered using Window > Preferences > General > Tracing preference page. The option which is shown in logs is org.eclipse.core.resources/build/needbuild=true. I have this and several other options always enabled to track suspicious workspace activity and that's why I can tell such workspace activity of JavaReconciler did not happen before. In case it matters, there are two Java editors open but only one is visible. The number of JavaReconciler operations is different each time, but I can reproduce the problem consistently on my workspace. Attaching several logs as example.
Created attachment 261788 [details] Trace 2
Created attachment 261789 [details] Trace 3
Created attachment 261790 [details] Trace 4
We haven't changed anything in that area. Can you reproduce in a new workspace and provide steps?
(In reply to Dani Megert from comment #4) > We haven't changed anything in that area. Can you reproduce in a new > workspace and provide steps? No, but I have another installation and was able to get a stack trace: Daemon Thread [org.eclipse.jdt.internal.ui.text.JavaReconciler] (Suspended (breakpoint at line 74 in AutoBuildJob)) owns: AutoBuildJob (id=1351) owns: Object (id=1204) AutoBuildJob.build(boolean) line: 74 BuildManager.endTopLevel(boolean) line: 523 Workspace.endOperation(ISchedulingRule, boolean, IProgressMonitor) line: 1484 Workspace.run(ICoreRunnable, ISchedulingRule, int, IProgressMonitor) line: 2253 Workspace.run(IWorkspaceRunnable, ISchedulingRule, int, IProgressMonitor) line: 2267 SetContainerOperation(JavaModelOperation).runOperation(IProgressMonitor) line: 795 JavaModelManager.getClasspathContainer(IPath, IJavaProject) line: 1973 JavaCore.getClasspathContainer(IPath, IJavaProject) line: 3424 JavaProject.resolveClasspath(IClasspathEntry[], IClasspathEntry[], boolean, boolean) line: 2693 JavaProject.resolveClasspath(JavaModelManager$PerProjectInfo, boolean, boolean) line: 2857 JavaProject.getResolvedClasspath() line: 1962 JavaProject.buildStructure(OpenableElementInfo, IProgressMonitor, Map, IResource) line: 464 JavaProject(Openable).generateInfos(Object, HashMap, IProgressMonitor) line: 259 JavaProject(JavaElement).openWhenClosed(Object, boolean, IProgressMonitor) line: 579 JavaProject(JavaElement).getElementInfo(IProgressMonitor) line: 316 JavaProject(JavaElement).getElementInfo() line: 302 JavaProject.getProjectCache() line: 1924 JavaProjectElementInfo.newNameLookup(JavaProject, ICompilationUnit[]) line: 310 JavaProject.newNameLookup(ICompilationUnit[]) line: 2329 CancelableNameEnvironment(SearchableEnvironment).<init>(JavaProject, ICompilationUnit[]) line: 61 CancelableNameEnvironment(SearchableEnvironment).<init>(JavaProject, WorkingCopyOwner) line: 68 CancelableNameEnvironment.<init>(JavaProject, WorkingCopyOwner, IProgressMonitor) line: 26 CompilationUnitProblemFinder.process(CompilationUnit, SourceElementParser, WorkingCopyOwner, HashMap, boolean, int, IProgressMonitor) line: 178 CompilationUnitProblemFinder.process(CompilationUnit, WorkingCopyOwner, HashMap, boolean, int, IProgressMonitor) line: 271 ReconcileWorkingCopyOperation.makeConsistent(CompilationUnit) line: 191 ReconcileWorkingCopyOperation.executeOperation() line: 90 ReconcileWorkingCopyOperation(JavaModelOperation).run(IProgressMonitor) line: 724 ReconcileWorkingCopyOperation(JavaModelOperation).runOperation(IProgressMonitor) line: 790 CompilationUnit.reconcile(int, int, WorkingCopyOwner, IProgressMonitor) line: 1250 JavaReconcilingStrategy.reconcile(ICompilationUnit, boolean) line: 128 JavaReconcilingStrategy.access$0(JavaReconcilingStrategy, ICompilationUnit, boolean) line: 110 JavaReconcilingStrategy$1.run() line: 90 SafeRunner.run(ISafeRunnable) line: 42 JavaReconcilingStrategy.reconcile(boolean) line: 87 JavaReconcilingStrategy.initialReconcile() line: 185 JavaCompositeReconcilingStrategy(CompositeReconcilingStrategy).initialReconcile() line: 119 JavaCompositeReconcilingStrategy.initialReconcile() line: 136 JavaReconciler(MonoReconciler).initialProcess() line: 95 JavaReconciler.initialProcess() line: 420 AbstractReconciler$BackgroundThread.run() line: 174
Created attachment 261801 [details] Stack (In reply to Szymon Ptaszkiewicz from comment #5) Formatting of stacks in bugzilla does not look good so I'm attaching the stack as as a text file (with fully qualified names).
This seems to be a timing problem because when the breakpoint is enabled, I get only one occurrence of the problem. If I disable the breakpoint, I get many occurrences as shown in attachments with traces.
Noopur, please check whether you can reproduce, and if so, whether this is a regression.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.
