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https://issues.apache.org/jira/browse/IVYDE-361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carsten Pfeiffer updated IVYDE-361:
-----------------------------------
Priority: Minor (was: Major)
> Deadlock in classpath container
> -------------------------------
>
> Key: IVYDE-361
> URL: https://issues.apache.org/jira/browse/IVYDE-361
> Project: IvyDE
> Issue Type: Bug
> Components: classpath container
> Reporter: Carsten Pfeiffer
> Priority: Minor
>
> The change in IvyClasspathContainer (asyncExec -> syncExec) may unfortunately
> lead to deadlock situations. If the main thread attempts to execute a job
> while the resolve job is already running, the main thread waits for the
> resolve job to finish. The latter then attempts to syncExec() into the main
> thread, which won't work.
> I'm wondering why the IvyClasspathContainer (now Impl) needs to syncExec() or
> asyncExec() at all. Do you remember why it cannot update the classpath in the
> background thread?
> {code}
> Thread [Worker-4] (Suspended)
> waiting for: RunnableLock (id=122)
> Object.wait(long) line: not available [native method]
> RunnableLock(Object).wait() line: 503
> Synchronizer.syncExec(Runnable) line: 187
> Display.syncExec(Runnable) line: 4330
> IvyClasspathContainerImpl.setClasspathEntries(IClasspathEntry[]) line:
> 148
> IvyClasspathContainerImpl.updateClasspathEntries(IClasspathEntry[])
> line: 144
> IvyClasspathResolver.postBatchResolve() line: 40
> IvyResolveJob.doRun(IProgressMonitor) line: 263
> IvyResolveJob.run(IProgressMonitor) line: 85
> Worker.run() line: 54
> {code}
> {code}
> Thread [main] (Suspended)
> owns: RunnableLock (id=122)
> waited by: Thread [Worker-4] (Suspended)
> waiting for: Object (id=123)
> Object.wait(long) line: not available [native method]
> Object.wait() line: 503
> ThreadJob.waitForRun(ThreadJob, IProgressMonitor, InternalJob, Thread)
> line: 272
> ThreadJob.joinRun(ThreadJob, IProgressMonitor) line: 199
> ImplicitJobs.begin(ISchedulingRule, IProgressMonitor, boolean) line: 92
> JobManager.beginRule(ISchedulingRule, IProgressMonitor) line: 286
> WorkManager.checkIn(ISchedulingRule, IProgressMonitor) line: 118
> Workspace.prepareOperation(ISchedulingRule, IProgressMonitor) line:
> 2282
> Folder(Resource).refreshLocal(int, IProgressMonitor) line: 1655
> ExternalFoldersManager.createLinkFolder(IPath, boolean, IProject,
> IProgressMonitor) line: 155
> ExternalFoldersManager.createLinkFolder(IPath, boolean,
> IProgressMonitor) line: 145
> ExternalFolderChange.updateExternalFoldersIfNecessary(boolean,
> IProgressMonitor) line: 48
>
> SetContainerOperation(ChangeClasspathOperation).classpathChanged(ClasspathChange,
> boolean) line: 62
> SetContainerOperation.executeOperation() line: 110
> SetContainerOperation(JavaModelOperation).run(IProgressMonitor) line:
> 728
> Workspace.run(IWorkspaceRunnable, ISchedulingRule, int,
> IProgressMonitor) line: 2344
>
> SetContainerOperation(JavaModelOperation).runOperation(IProgressMonitor)
> line: 793
> JavaCore.setClasspathContainer(IPath, IJavaProject[],
> IClasspathContainer[], IProgressMonitor) line: 4952
> IvyClasspathContainerImpl.notifyUpdateClasspathEntries() line: 172
> IvyClasspathContainerImpl$1.run() line: 162
> RunnableLock.run() line: 35
> Synchronizer.runAsyncMessages(boolean) line: 135
> Display.runAsyncMessages(boolean) line: 3563
> Display.readAndDispatch() line: 3212
> ...
> {code}
> (This is basically a copy of my comments to the already close IVYDE-259.
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