Gradle clean无法删除依赖jar

Question

我有一个多模块Gradle 4.4项目 - 有一个父build.gradle ，然后是两个子Gradle项目，每个项目都有自己的build.gradle 。 两者都是Java项目（一个用于开发代码，另一个用于QA）。 开发项目是QA项目的依赖项（我在QA项目的build.gradle有testCompile project(':dev-project') ）。 否则build.gradle文件中没有任何远程有趣或异常的build.gradle - 它们导入java插件和com.github.johnrengelman.shadow 。

如果我尝试连续两次构建父项目（没有IDE打开，在没有管理员权限的情况下从Git Bash运行./gradlew clean build ），则构建失败：

09:55:24.449 [DEBUG] [org.gradle.internal.progress.DefaultBuildOperationExecutor] Completing Build operation 'Execute clean for :dev-project:clean'
09:55:24.449 [DEBUG] [org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter] Removed task artifact state for {} from context.
09:55:24.450 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':dev-project:clean'
09:55:24.450 [LIFECYCLE] [class org.gradle.internal.buildevents.TaskExecutionLogger] :dev-project:clean FAILED
09:55:24.451 [WARN] [org.gradle.api.Project] :dev-project:clean took 1587ms
09:55:24.451 [DEBUG] [org.gradle.internal.progress.DefaultBuildOperationExecutor] Completing Build operation 'Task :dev-project:clean'
09:55:24.451 [DEBUG] [org.gradle.internal.progress.DefaultBuildOperationExecutor] Build operation 'Task :dev-project:clean' completed
09:55:24.452 [INFO] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] :dev-project:clean (Thread[Task worker for ':',5,main]) completed. Took 1.588 secs.
09:55:24.452 [DEBUG] [org.gradle.internal.work.DefaultWorkerLeaseService] Worker lease root.1.14 completed (1 worker(s) in use)
09:55:24.452 [DEBUG] [org.gradle.internal.resources.AbstractTrackedResourceLock] Task worker for ':': released lock on root.1.14
09:55:24.452 [DEBUG] [org.gradle.internal.resources.AbstractTrackedResourceLock] Task worker for ':': released lock on :
09:55:24.452 [DEBUG] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] Task worker [Thread[Task worker for ':',5,main]] finished, busy: 1.588 secs, idle:     0.002 secs
09:55:24.453 [DEBUG] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] Task worker [Thread[Daemon worker Thread 3,5,main]] finished, busy: 0.0 secs, idle:     1.59 secs
09:55:24.453 [DEBUG] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] Task worker [Thread[Task worker for ':' Thread 2,5,main]] finished, busy: 0.0 secs,     idle: 1.591 secs
09:55:24.454 [DEBUG] [org.gradle.execution.taskgraph.DefaultTaskPlanExecutor] Task worker [Thread[Task worker for ':' Thread 3,5,main]] finished, busy: 0.0 secs,     idle: 1.592 secs
09:55:24.455 [DEBUG] [org.gradle.internal.progress.DefaultBuildOperationExecutor] Completing Build operation 'Run tasks'
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Execution failed for task 'dev-project:clean'.
09:55:24.456 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > Unable to delete file:     C:\workspace\parent-project\dev-project\libs\dev-project-0.1.0.jar
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Try:
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]  Run with --scan to get full insights.
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Exception is:
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] org.gradle.api.tasks.TaskExecutionException: Execution failed for task     ':dev-project:clean'.
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(    ExecuteActionsTaskExecuter.java:100)
09:55:24.457 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(    ExecuteActionsTaskExecuter.java:70)
09:55:24.458 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at     org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
09:55:24.458 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter]   at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(    SkipUpToDateTaskExecuter.java:62)

我怀疑dev-project JAR无法删除，因为它依赖于QA项目，所以Gradle对它保持某种锁定。

如果我在Windows任务管理器中删除Java(TM) Platform SE Binary进程，我可以成功构建，但我希望它是自动的。

Answer 1

此错误是由Gradle Daemon引起的 - 它在构建完成后仍在后台运行，并且由于某种原因在dev-project jar上保持锁定。

将org.gradle.daemon=false添加到我的全局gradle.properties文件已经解决了这个问题，尽管代价是建立速度略慢。

我向Gradle团队提出了一个问题 ，如果有任何问题 ，我会更新这个答案。