Starting language server crashes

When building SAP hybris from the command line (outside of vscode) with ant, nearly all class files get regenerated.
Afterwards the langage server hangs at 22-24% and outputs the error logs down below.

Environment

• Operating System: macOS 10.12.6 (16G1036)
• JDK version: 1.8.0_144
• Visual Studio Code version: Version 1.18.0 (1.18.0)
• Java extension version: 0.14.0

Steps To Reproduce

1. Start vscode and load a java file -> language server gets invoked
2. rebuild whole SAP hybris suite (several 10k classes)
   3 switch back to vscode -> the language server tries to refresh and crashes

[attach a sample project reproducing the error]
attach logs

Current Result

[Error - 15:42:07] 16.11.2017 15:40:54 Invalid project description.
[Error - 15:42:07] 16.11.2017 15:40:54 An internal error occurred during: "Initialize Workspace".
org.eclipse.core.internal.resources.ResourceException: Invalid project description.
java.lang.RuntimeException: org.eclipse.core.internal.resources.ResourceException: Invalid project description.
	at org.eclipse.jdt.ls.core.internal.managers.EclipseProjectImporter.importDir(EclipseProjectImporter.java:96)
	at org.eclipse.jdt.ls.core.internal.managers.EclipseProjectImporter.lambda$0(EclipseProjectImporter.java:63)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at org.eclipse.jdt.ls.core.internal.managers.EclipseProjectImporter.importToWorkspace(EclipseProjectImporter.java:63)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.importProjects(ProjectsManager.java:100)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.access$1(ProjectsManager.java:94)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager$1.run(ProjectsManager.java:88)
	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:5660)
	at org.eclipse.jdt.core.JavaCore.run(JavaCore.java:5617)
	at org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.initializeProjects(ProjectsManager.java:82)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler$1.runInWorkspace(InitHandler.java:157)
	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
Caused by: org.eclipse.core.internal.resources.ResourceException: Invalid project description.
	at org.eclipse.core.internal.resources.Project.checkDescription(Project.java:169)
	at org.eclipse.core.internal.resources.Project.assertCreateRequirements(Project.java:53)
	at org.eclipse.core.internal.resources.Project.create(Project.java:263)
	at org.eclipse.core.internal.resources.Project.create(Project.java:247)
	at org.eclipse.jdt.ls.core.internal.managers.EclipseProjectImporter.importDir(EclipseProjectImporter.java:92)
	... 17 more

Expected Result

Don't crash

Additional Informations

Reproduce the crash by opening a Java file in VS Code and rebuilding the SAP hybris suite with Ant, using the stated macOS and JDK environment if available. Start with the stack trace at EclipseProjectImporter.java:96 and follow initialization through ProjectsManager and InitHandler. Done means the language server completes workspace refresh without the Invalid project description error.