ResourceException: Problems encountered while copying resources.

I started getting the error below popping up every once in a while since upgrading to one of the later releases.

Environment

• Operating System: OSX Sierra - 10.12.3
• JDK version: 8.121
• Visual Studio Code version: 1.10.2
• Java extension version: 0.0.13

Steps To Reproduce

1. Ever since the latest update I have been receiving the error below. This is happening on an Android project.

[Error - 5:00:10 PM] Mar 20, 2017 2:50:47 PM JavaBuilder handling ImageBuilderInternalException while building: jdt.ls-java-project
Problems encountered while copying resources.
org.eclipse.core.internal.resources.ResourceException: Problems encountered while copying resources.
	at org.eclipse.core.internal.localstore.FileSystemResourceManager.copy(FileSystemResourceManager.java:336)
	at org.eclipse.core.internal.resources.Resource.copy(Resource.java:545)
	at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.copyResource(AbstractImageBuilder.java:383)
	at org.eclipse.jdt.internal.core.builder.BatchImageBuilder$3.visit(BatchImageBuilder.java:231)
	at org.eclipse.core.internal.resources.Resource$1.visitElement(Resource.java:84)
	at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:82)
	at org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:87)
	at org.eclipse.core.internal.watson.ElementTreeIterator.iterate(ElementTreeIterator.java:129)
	at org.eclipse.core.internal.resources.Resource.accept(Resource.java:94)
	at org.eclipse.core.internal.resources.Resource.accept(Resource.java:52)
	at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.copyExtraResourcesBack(BatchImageBuilder.java:200)
	at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:124)
	at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:47)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:256)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:180)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:735)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:301)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:304)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:360)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:383)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:142)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:232)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
Contains: Resource '/jdt.ls-java-project/src/pom.xml' does not exist.

Unfortunately, I am not able to upload a sample project right now.

首先，在使用所报告的 VS Code 和 Java 扩展环境的 Android 项目中复现间歇性故障。跟踪从 JavaBuilder 经过 BatchImageBuilder.copyExtraResourcesBack 抛出的 ResourceException，重点关注缺失的 jdt.ls-java-project/src/pom.xml 资源。在所报告的条件下理解复制失败的原因且该问题不再发生，即表示完成。