Core Exception [code 269] File not found: /USERS/...

File name should start with /Users/ instead of /USERS/.

Environment

• Operating System: macOS case sensitive
• JDK version: 1.8 112
• Visual Studio Code version: 1.13
• Java extension version: 0.5.0

[Error - 8:09:15 PM] Jun 10, 2017 8:01:33 PM Creating working copy 
File not found: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java.
Java Model Exception: Core Exception [code 269] File not found: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java.
	at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsCharArray(Util.java:1192)
	at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsCharArray(Util.java:1164)
	at org.eclipse.jdt.internal.core.CompilationUnit.openBuffer(CompilationUnit.java:1153)
	at org.eclipse.jdt.internal.core.CompilationUnit.buildStructure(CompilationUnit.java:115)
	at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:259)
	at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:579)
	at org.eclipse.jdt.internal.core.BecomeWorkingCopyOperation.executeOperation(BecomeWorkingCopyOperation.java:39)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:790)
	at org.eclipse.jdt.internal.core.CompilationUnit.becomeWorkingCopy(CompilationUnit.java:99)
	at org.eclipse.jdt.internal.core.CompilationUnit.becomeWorkingCopy(CompilationUnit.java:107)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.handleOpen(DocumentLifeCycleHandler.java:150)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.access$1(DocumentLifeCycleHandler.java:115)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler$2.run(DocumentLifeCycleHandler.java:75)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2262)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.didOpen(DocumentLifeCycleHandler.java:72)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.didOpen(JDTLanguageServer.java:343)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.notify(GenericEndpoint.java:126)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleNotification(RemoteEndpoint.java:165)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:136)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.eclipse.core.runtime.CoreException: File not found: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java.
	at org.eclipse.core.internal.filesystem.Policy.error(Policy.java:45)
	at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:406)
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:849)
	at org.eclipse.core.internal.resources.File.getContents(File.java:277)
	at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsCharArray(Util.java:1190)
	... 33 more
Caused by: java.io.FileNotFoundException: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java (No such file or directory)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:401)
	... 36 more
Caused by: org.eclipse.core.runtime.CoreException: File not found: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java.
	at org.eclipse.core.internal.filesystem.Policy.error(Policy.java:45)
	at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:406)
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:849)
	at org.eclipse.core.internal.resources.File.getContents(File.java:277)
	at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsCharArray(Util.java:1190)
	at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsCharArray(Util.java:1164)
	at org.eclipse.jdt.internal.core.CompilationUnit.openBuffer(CompilationUnit.java:1153)
	at org.eclipse.jdt.internal.core.CompilationUnit.buildStructure(CompilationUnit.java:115)
	at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:259)
	at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:579)
	at org.eclipse.jdt.internal.core.BecomeWorkingCopyOperation.executeOperation(BecomeWorkingCopyOperation.java:39)
	at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:724)
	at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:790)
	at org.eclipse.jdt.internal.core.CompilationUnit.becomeWorkingCopy(CompilationUnit.java:99)
	at org.eclipse.jdt.internal.core.CompilationUnit.becomeWorkingCopy(CompilationUnit.java:107)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.handleOpen(DocumentLifeCycleHandler.java:150)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.access$1(DocumentLifeCycleHandler.java:115)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler$2.run(DocumentLifeCycleHandler.java:75)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2240)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2262)
	at org.eclipse.jdt.ls.core.internal.handlers.DocumentLifeCycleHandler.didOpen(DocumentLifeCycleHandler.java:72)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.didOpen(JDTLanguageServer.java:343)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:51)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.notify(GenericEndpoint.java:126)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleNotification(RemoteEndpoint.java:165)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:136)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:149)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:77)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:84)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: /USERS/vadzim/Documents/android/frameworks/base/core/java/android/content/Intent.java (No such file or directory)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:401)
	... 36 more

首先通过 DocumentLifeCycleHandler 和 JDTLanguageServer 跟踪打开文档的路径，使用堆栈跟踪定位 /USERS/ 路径的引入位置。在区分大小写的 macOS 文件系统上重现该故障，并验证所引用的 /Users/ 文件可以在没有 Core Exception 的情况下打开。