ResourceException during LibraryClasspathContainer initialization #3181
Description
As a follow-on to #3180, I noticed the following exception being logged.
Jun 26, 2018 1:32:02 PM com.google.cloud.tools.eclipse.appengine.libraries.repository.LibraryClasspathContainerResolverService resolveContainer
SEVERE: Could not resolve container: com.google.cloud.tools.eclipse.appengine.libraries/appengine-api
org.eclipse.core.internal.resources.ResourceException: The resource tree is locked for modifications.
at org.eclipse.core.internal.resources.WorkManager.checkIn(WorkManager.java:119)
at org.eclipse.core.internal.resources.Workspace.prepareOperation(Workspace.java:2188)
at org.eclipse.core.internal.resources.Folder.create(Folder.java:90)
at org.eclipse.core.internal.resources.Folder.create(Folder.java:121)
at com.google.cloud.tools.eclipse.appengine.libraries.persistence.LibraryClasspathContainerSerializer$DefaultStateLocationProvider.getFile(LibraryClasspathContainerSerializer.java:215)
at com.google.cloud.tools.eclipse.appengine.libraries.persistence.LibraryClasspathContainerSerializer$DefaultStateLocationProvider.getContainerStateFile(LibraryClasspathContainerSerializer.java:202)
at com.google.cloud.tools.eclipse.appengine.libraries.persistence.LibraryClasspathContainerSerializer.getContainerStateFile(LibraryClasspathContainerSerializer.java:184)
at com.google.cloud.tools.eclipse.appengine.libraries.persistence.LibraryClasspathContainerSerializer.saveContainer(LibraryClasspathContainerSerializer.java:87)
at com.google.cloud.tools.eclipse.appengine.libraries.repository.LibraryClasspathContainerResolverService.resolveContainer(LibraryClasspathContainerResolverService.java:173)
at com.google.cloud.tools.eclipse.appengine.libraries.LibraryClasspathContainerInitializer.initialize(LibraryClasspathContainerInitializer.java:86)
at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:3114)
at org.eclipse.jdt.internal.core.JavaModelManager$10.run(JavaModelManager.java:3020)
at org.eclipse.jdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:3058)
at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:2058)
at org.eclipse.jdt.core.JavaCore.getClasspathContainer(JavaCore.java:3568)
at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2986)
at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:3150)
at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:2255)
at org.eclipse.jdt.internal.core.DeltaProcessingState.getRootInfos(DeltaProcessingState.java:310)
at org.eclipse.jdt.internal.core.DeltaProcessingState.initializeRoots(DeltaProcessingState.java:255)
at org.eclipse.jdt.internal.core.DeltaProcessor.processResourceDelta(DeltaProcessor.java:1926)
at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:2128)
at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:473)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:299)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:289)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:152)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:374)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1469)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2253)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2267)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:128)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
This occurs in the following code:
JavaCore.setClasspathContainer(
containerPath,
new IJavaProject[] {javaProject},
new IClasspathContainer[] {container},
subMonitor.newChild(1));
serializer.saveContainer(javaProject, container);
for (Job job : sourceAttacherJobs) {
job.schedule();
}We haven't noticed this problem previously because the classpath container was successfully resolved and set on the project.