我有一个包含许多子模块的大型 Java 桌面(非 Android)项目，最近我开始尝试让它在 Windows 10 上构建和运行。(通常我在 MacOS 上运行构建。)
在尝试运行测试时，我们始终会遇到错误；这个错误发生在我自己以及该项目的其他开发人员的 Windows 10 计算机上，从重新检查代码开始。
这是错误:
2020-11-09T18:21:51.995-0800 [INFO] [org.gradle.internal.snapshot.impl.DirectorySnapshotter] 无法读取文件路径 'C:\Users\Me\myproject\.gradle\6.6.1\executionHistory\executionHistory.lock'。
--debug 日志中的错误之后紧接着是以下堆栈跟踪；我不知道它是否相关，但每次出现上述错误后都会出现:
java.io.UncheckedIOException: Failed to create MD5 hash for file content.
at org.gradle.internal.hash.DefaultStreamHasher.hash(DefaultStreamHasher.java:37)
at org.gradle.internal.hash.DefaultFileHasher.hash(DefaultFileHasher.java:41)
at org.gradle.api.internal.changedetection.state.CachingFileHasher.snapshot(CachingFileHasher.java:87)
at org.gradle.api.internal.changedetection.state.CachingFileHasher.hash(CachingFileHasher.java:69)
at org.gradle.api.internal.changedetection.state.SplitFileHasher.hash(SplitFileHasher.java:54)
at org.gradle.internal.snapshot.impl.DirectorySnapshotter$PathVisitor.snapshotFile(DirectorySnapshotter.java:281)
at org.gradle.internal.snapshot.impl.DirectorySnapshotter$PathVisitor.visitResolvedFile(DirectorySnapshotter.java:260)
at org.gradle.internal.snapshot.impl.DirectorySnapshotter$PathVisitor.visitFile(DirectorySnapshotter.java:238)
at org.gradle.internal.snapshot.impl.DirectorySnapshotter$PathVisitor.visitFile(DirectorySnapshotter.java:173)
at java.base/java.nio.file.Files.walkFileTree(Files.java:2804)
at org.gradle.internal.snapshot.impl.DirectorySnapshotter.snapshot(DirectorySnapshotter.java:73)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.snapshot(DefaultVirtualFileSystem.java:146)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.lambda$readLocation$15(DefaultVirtualFileSystem.java:166)
at java.base/java.util.Optional.orElseGet(Optional.java:362)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.lambda$readLocation$16(DefaultVirtualFileSystem.java:166)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem$StripedProducerGuard.guardByKey(DefaultVirtualFileSystem.java:203)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.lambda$readLocation$17(DefaultVirtualFileSystem.java:165)
at java.base/java.util.Optional.orElseGet(Optional.java:362)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.readLocation(DefaultVirtualFileSystem.java:165)
at org.gradle.internal.vfs.impl.DefaultVirtualFileSystem.read(DefaultVirtualFileSystem.java:64)
at org.gradle.internal.vfs.RoutingVirtualFileSystem.read(RoutingVirtualFileSystem.java:53)
at org.gradle.internal.fingerprint.impl.DefaultFileCollectionSnapshotter$SnapshottingVisitor.visitCollection(DefaultFileCollectionSnapshotter.java:61)
at org.gradle.api.internal.file.AbstractOpaqueFileCollection.visitContents(AbstractOpaqueFileCollection.java:55)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.collections.UnpackingVisitor.visitSingleFile(UnpackingVisitor.java:108)
at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:103)
at org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection$UnresolvedItemsCollector.visitContents(DefaultConfigurableFileCollection.java:380)
at org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection.visitChildren(DefaultConfigurableFileCollection.java:292)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.UnionFileCollection.visitChildren(UnionFileCollection.java:78)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.UnionFileCollection.visitChildren(UnionFileCollection.java:78)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.UnionFileCollection.visitChildren(UnionFileCollection.java:78)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:61)
at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:86)
at org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection$UnresolvedItemsCollector.visitContents(DefaultConfigurableFileCollection.java:380)
at org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection.visitChildren(DefaultConfigurableFileCollection.java:292)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:61)
at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:86)
at org.gradle.api.internal.file.DefaultFileCollectionFactory$ResolvingFileCollection.visitChildren(DefaultFileCollectionFactory.java:310)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:119)
at org.gradle.api.internal.tasks.PropertyFileCollection.visitChildren(PropertyFileCollection.java:48)
at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:119)
at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:326)
at org.gradle.internal.fingerprint.impl.DefaultFileCollectionSnapshotter.snapshot(DefaultFileCollectionSnapshotter.java:50)
at org.gradle.internal.fingerprint.impl.AbstractFileCollectionFingerprinter.fingerprint(AbstractFileCollectionFingerprinter.java:47)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.lambda$visitInputFileProperties$1(ExecuteActionsTaskExecuter.java:327)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.lambda$fingerprintInputFiles$3(CaptureStateBeforeExecutionStep.java:192)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.visitInputFileProperties(ExecuteActionsTaskExecuter.java:325)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.fingerprintInputFiles(CaptureStateBeforeExecutionStep.java:188)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.captureExecutionState(CaptureStateBeforeExecutionStep.java:150)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.lambda$captureExecutionStateOp$1(CaptureStateBeforeExecutionStep.java:104)
at org.gradle.internal.execution.steps.BuildOperationStep$1.call(BuildOperationStep.java:40)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:409)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:399)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:157)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:242)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:150)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:94)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
at org.gradle.internal.execution.steps.BuildOperationStep.operation(BuildOperationStep.java:37)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.captureExecutionStateOp(CaptureStateBeforeExecutionStep.java:103)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.lambda$execute$0(CaptureStateBeforeExecutionStep.java:78)
at java.base/java.util.Optional.map(Optional.java:258)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:78)
at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:53)
at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:74)
at org.gradle.internal.execution.steps.SkipEmptyWorkStep.lambda$execute$2(SkipEmptyWorkStep.java:78)
at java.base/java.util.Optional.orElseGet(Optional.java:362)
at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:78)
at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:34)
at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:39)
at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:40)
at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:28)
at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:33)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:195)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:187)
at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:114)
at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:62)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:409)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:399)
at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:157)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:242)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:150)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:94)
at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:41)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:372)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:359)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:352)
at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:338)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182)
at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.io.IOException: The process cannot access the file because another process has locked a portion of the file
at java.base/java.io.FileInputStream.readBytes(Native Method)
at java.base/java.io.FileInputStream.read(FileInputStream.java:249)
at org.gradle.internal.hash.DefaultStreamHasher.doHash(DefaultStreamHasher.java:52)
at org.gradle.internal.hash.DefaultStreamHasher.hash(DefaultStreamHasher.java:35)
... 124 more
我还看到有关读取其他文件的错误:
2020-11-09T18:21:51.998-0800 [INFO] [org.gradle.internal.snapshot.impl.DirectorySnapshotter] 无法读取文件路径 'C:\Users\Me\myproject\.gradle\6.6.1\fileContent\fileContent.lock'。
(上面后面是一对相同的有关 MD5 哈希值的异常和锁定文件一部分的其他进程)
2020-11-09T18:21:52.029-0800 [INFO] [org.gradle.internal.snapshot.impl.DirectorySnapshotter] 无法读取文件路径 'C:\Users\Me\myproject\.gradle\6.6.1\fileHashes\fileHashes.lock'。
(相同)
请注意，整个项目在 Windows 10 上构建并正确运行。这只是运行测试时出现的问题。但我很想解决这个问题，以便 Windows 开发人员可以运行它们。
我尝试了以下方法，但都不起作用。
- 在不同机器上重新 check out 项目
- 删除项目的
.gradle文件夹并全新重建 - 牺牲一只很小的山羊
起初我认为该错误可能是由某些失败的测试引起的(我有一些集成测试未在 Windows 10 上运行)，但禁用这些测试后，我(和我的队友)仍然收到错误。
请注意，在 Docker 容器内构建的上下文中，提出了一个非常相似的问题:OSError: Can not read file in context: \\?\C:\project\.gradle\6.6.1\executionHistory\executionHistory.lock
但是，我们不是在 Docker 容器内构建，并且上述解决方案对我们不起作用。我正在 Mac OS Catalina 主机上构建 VirtualBox Windows 10 guest 虚拟机，而我的队友也在 Windows 10 笔记本电脑上构建，他也看到了该错误。这里不涉及 Docker。
我欢迎有关如何帮助进一步诊断此问题的想法。请注意，由于项目的规模和历史悠久，尝试将其范围缩小到小样本复制案例是不切实际的。
最佳答案
我遇到了同样的问题，并用 Gradle build error on Windows "Failed to create MD5 hash for file" 的答案解决了它
The issue here is that the destination directory contains the .gradle directory, which is used by the initial gradle process and is thus locked in Windows. Then the daemon tries to hash the lockfile, because it hashes all files in the destination dir to check if the task is up to date, but since it is a lockfile, it can't be accessed by any other process. The solution is to set the output directory of the task to a folder where it can't interfere with any locked files.
总而言之，您可以通过使用如下标志运行 gradlew 来解决您的问题:
--project-cache-dir=../cache
关于testing - Gradle 无法在 Windows 10 上运行我的项目测试(读取executionHistory.lock 时出错；多进程锁定文件)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/64762203/