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Bug 527776

Summary:	Error in log: "Resource '/.org.eclipse.jdt.core.external.folders' already exists."
Product:	[Eclipse Project] JDT	Reporter:	Andrey Loskutov <loskutov>
Component:	Core	Assignee:	Andrey Loskutov <loskutov>
Status:	VERIFIED FIXED	QA Contact:
Severity:	normal
Priority:	P3
Version:	4.5
Target Milestone:	4.8 M4
Hardware:	All
OS:	All
See Also:	https://bugs.eclipse.org/bugs/show_bug.cgi?id=526180 https://git.eclipse.org/r/#/c/112313/ https://bugs.eclipse.org/bugs/show_bug.cgi?id=527819 https://git.eclipse.org/c/jdt/eclipse.jdt.core.git/commit/?id=e45ddc1659ac0d14714b0b0978ad0b020a4ef2eb
Whiteboard:
Bug Depends on:	526180
Bug Blocks:

Description Andrey Loskutov

2017-11-27 03:51:38 EST

Aeri report:

https://dev.eclipse.org/recommenders/committers/aeri/v2/#!/problems/55ce3600e4b07ee9504fc54f

We observe same issue in our tests, randomly we get this:

!ENTRY EWC.TEST 1 0 2017-11-26 04:06:09.516
!MESSAGE Job (Update Installed JREs class org.eclipse.jdt.internal.launching.LaunchingPlugin$JREUpdateJob) during test testReceiveDifferentNotifications encountered resource exception

!ENTRY org.eclipse.core.resources 4 374 2017-11-26 04:06:09.516
!MESSAGE Resource '/.org.eclipse.jdt.core.external.folders' already exists.
!STACK 0
java.lang.Exception: Resource '/.org.eclipse.jdt.core.external.folders' already exists.
	at org.eclipse.core.internal.resources.ResourceException.provideStackTrace(ResourceException.java:39)
	at org.eclipse.core.internal.resources.ResourceException.<init>(ResourceException.java:35)
	at org.eclipse.core.internal.resources.Resource.checkDoesNotExist(Resource.java:314)
	at org.eclipse.core.internal.resources.Resource.checkDoesNotExist(Resource.java:301)
	at org.eclipse.core.internal.resources.Project.assertCreateRequirements(Project.java:52)
	at org.eclipse.core.internal.resources.Project.create(Project.java:263)
	at org.eclipse.jdt.internal.core.ExternalFoldersManager.createExternalFoldersProject(ExternalFoldersManager.java:320)
	at org.eclipse.jdt.internal.core.ExternalFoldersManager.createExternalFoldersProject(ExternalFoldersManager.java:262)
	at org.eclipse.jdt.internal.core.ExternalFoldersManager.createLinkFolder(ExternalFoldersManager.java:168)
	at org.eclipse.jdt.internal.core.ExternalFolderChange.updateExternalFoldersIfNecessary(ExternalFolderChange.java:49)
	at org.eclipse.jdt.internal.core.ChangeClasspathOperation.classpathChanged(ChangeClasspathOperation.java:59)
	at org.eclipse.jdt.internal.core.SetContainerOperation.executeOperation(SetContainerOperation.java:111)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:795)
	at org.eclipse.jdt.core.JavaCore.setClasspathContainer(JavaCore.java:5679)
	at org.eclipse.jdt.internal.launching.JREContainerInitializer.initialize(JREContainerInitializer.java:111)
	at org.eclipse.jdt.internal.launching.LaunchingPlugin$VMChanges.rebind(LaunchingPlugin.java:365)
	at org.eclipse.jdt.internal.launching.LaunchingPlugin$VMChanges.access$0(LaunchingPlugin.java:299)
	at org.eclipse.jdt.internal.launching.LaunchingPlugin$VMChanges$1.run(LaunchingPlugin.java:285)
	at org.eclipse.jdt.internal.core.BatchOperation.executeOperation(BatchOperation.java:39)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267)
	at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5609)
	at org.eclipse.jdt.internal.launching.LaunchingPlugin$VMChanges.doit(LaunchingPlugin.java:289)
	at org.eclipse.jdt.internal.launching.LaunchingPlugin$JREUpdateJob.run(LaunchingPlugin.java:386)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)

Comment 1 Eclipse Genie

2017-11-27 18:07:16 EST

Gerrit change https://git.eclipse.org/r/112313 was merged to [master].
Commit: http://git.eclipse.org/c/jdt/eclipse.jdt.core.git/commit/?id=e45ddc1659ac0d14714b0b0978ad0b020a4ef2eb

Comment 2 Andrey Loskutov

2017-11-27 18:09:57 EST

The fix for the concrete error was trivial, but the main root cause is the bug 526180. Closing this one and going to fix bug 526180.

Comment 3 Sasikanth Bharadwaj

2017-12-06 03:35:17 EST

Verified for 4.8 M4 (by inspection)