gradlew assembleRelease 失败并出现 java.lang.ClassNotFoundException：com.sun.tools.javac.util.Context答案

【问题标题】：gradlew assembleRelease Fails With java.lang.ClassNotFoundException: com.sun.tools.javac.util.Contextgradlew assembleRelease 失败并出现 java.lang.ClassNotFoundException：com.sun.tools.javac.util.Context
【发布时间】：2018-05-17 23:59:04
【问题描述】：

旁注 - 这篇文章与compileReleaseKotlin fails with java.lang.ClassNotFoundException: com.sun.tools.javac.util.Context 相似（但不完全相同），但我想我会在自己的帖子中详细介绍我的情况，以获得尽可能好的反馈。另外，我尝试了该帖子中的所有解决方案，但都没有奏效。

我正在尝试为我的应用生成未签名的发布 APK。为此，我使用命令gradlew assembleRelease。

我收到以下错误：

Caught an exception trying to connect to Kotlin Daemon
java.lang.ClassNotFoundException: com.sun.tools.javac.util.Context
        at java.base/java.net.URLClassLoader.findClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Unknown Source)
        at org.jetbrains.kotlin.gradle.tasks.JarSearchingUtilKt.findToolsJ
ar(jarSearchingUtil.kt:79)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment$t
oolsJar$2.invoke(GradleCompilerEnvironment.kt:20)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment$t
oolsJar$2.invoke(GradleCompilerEnvironment.kt:14)
        at kotlin.SynchronizedLazyImpl.getValue(Lazy.kt:130)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment.g
etToolsJar(GradleCompilerEnvironment.kt)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment.g
etCompilerFullClasspath(GradleCompilerEnvironment.kt:23)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.getDae
monConnection(GradleKotlinCompilerRunner.kt:336)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eWithDaemon(GradleKotlinCompilerRunner.kt:181)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eWithDaemonOrFallback(GradleKotlinCompilerRunner.kt:156)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eWithDaemonOrFallback(GradleKotlinCompilerRunner.kt:53)
        at org.jetbrains.kotlin.compilerRunner.KotlinCompilerRunner.runCom
piler(KotlinCompilerRunner.kt:127)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runJvm
Compiler(GradleKotlinCompilerRunner.kt:108)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$ko
tlin_gradle_plugin(Tasks.kt:378)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$ko
tlin_gradle_plugin(Tasks.kt:253)
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.execute
(Tasks.kt:215)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0
(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(
Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.inv
oke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:7
3)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskActi
on.doExecute(IncrementalTaskAction.java:46)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.
execute(StandardTaskAction.java:39)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.
execute(StandardTaskAction.java:26)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter$1.run(ExecuteActionsTaskExecuter.java:121)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.exec
ute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(
DefaultBuildOperationExecutor.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.executeAction(ExecuteActionsTaskExecuter.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.executeActions(ExecuteActionsTaskExecuter.java:92)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.execute(ExecuteActionsTaskExecuter.java:70)
        at org.gradle.api.internal.tasks.execution.OutputDirectoryCreating
TaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecute
r.execute(SkipUpToDateTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachin
gStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.
execute(ValidatingTaskExecuter.java:60)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTas
kExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:97)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExec
uter.execute(CleanupStaleOutputsExecuter.java:87)
        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStat
eTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsEx
ecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.
execute(SkipOnlyIfTaskExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskEx
ecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecu
ter.execute(CatchExceptionTaskExecuter.java:34)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.exec
ute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(
DefaultBuildOperationExecutor.java:110)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.processTask(DefaultTaskPlanExecutor.java:123)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.access$200(DefaultTaskPlanExecutor.java:79)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute
(DefaultTaskExecutionPlan.java:626)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute
WithTask(DefaultTaskExecutionPlan.java:581)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.run(DefaultTaskPlanExecutor.java:98)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFai
lures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(Manage
dExecutorImpl.java:46)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unk
nown Source)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Un
known Source)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadR
unnable.run(ThreadFactoryImpl.java:55)
        at java.base/java.lang.Thread.run(Unknown Source)
Could not perform incremental compilation: Could not connect to Kotlin com
pile daemon
Could not connect to kotlin daemon. Using fallback strategy.
e: java.lang.ClassNotFoundException: com.sun.tools.javac.util.Context
        at java.base/java.net.URLClassLoader.findClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Unknown Source)
        at org.jetbrains.kotlin.gradle.tasks.JarSearchingUtilKt.findToolsJ
ar(jarSearchingUtil.kt:79)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment$t
oolsJar$2.invoke(GradleCompilerEnvironment.kt:20)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment$t
oolsJar$2.invoke(GradleCompilerEnvironment.kt:14)
        at kotlin.SynchronizedLazyImpl.getValue(Lazy.kt:130)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment.g
etToolsJar(GradleCompilerEnvironment.kt)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerEnvironment.g
etCompilerFullClasspath(GradleCompilerEnvironment.kt:23)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eOutOfProcess(GradleKotlinCompilerRunner.kt:303)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eWithDaemonOrFallback(GradleKotlinCompilerRunner.kt:171)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.compil
eWithDaemonOrFallback(GradleKotlinCompilerRunner.kt:53)
        at org.jetbrains.kotlin.compilerRunner.KotlinCompilerRunner.runCom
piler(KotlinCompilerRunner.kt:127)
        at org.jetbrains.kotlin.compilerRunner.GradleCompilerRunner.runJvm
Compiler(GradleKotlinCompilerRunner.kt:108)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$ko
tlin_gradle_plugin(Tasks.kt:378)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompiler$ko
tlin_gradle_plugin(Tasks.kt:253)
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.execute
(Tasks.kt:215)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0
(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(
Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.inv
oke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:7
3)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskActi
on.doExecute(IncrementalTaskAction.java:46)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.
execute(StandardTaskAction.java:39)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.
execute(StandardTaskAction.java:26)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter$1.run(ExecuteActionsTaskExecuter.java:121)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.exec
ute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(
DefaultBuildOperationExecutor.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.executeAction(ExecuteActionsTaskExecuter.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.executeActions(ExecuteActionsTaskExecuter.java:92)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecu
ter.execute(ExecuteActionsTaskExecuter.java:70)
        at org.gradle.api.internal.tasks.execution.OutputDirectoryCreating
TaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecute
r.execute(SkipUpToDateTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachin
gStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.
execute(ValidatingTaskExecuter.java:60)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTas
kExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:97)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExec
uter.execute(CleanupStaleOutputsExecuter.java:87)
        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStat
eTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsEx
ecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.
execute(SkipOnlyIfTaskExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskEx
ecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecu
ter.execute(CatchExceptionTaskExecuter.java:34)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$Runn
ableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.exec
ute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(
DefaultBuildOperationExecutor.java:110)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFi
ringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.processTask(DefaultTaskPlanExecutor.java:123)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.access$200(DefaultTaskPlanExecutor.java:79)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute
(DefaultTaskExecutionPlan.java:626)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute
WithTask(DefaultTaskExecutionPlan.java:581)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExec
utorWorker.run(DefaultTaskPlanExecutor.java:98)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFai
lures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(Manage
dExecutorImpl.java:46)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unk
nown Source)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Un
known Source)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadR
unnable.run(ThreadFactoryImpl.java:55)
        at java.base/java.lang.Thread.run(Unknown Source)

这里有一些关于我目前情况的更多信息：

我使用的是 Windows 10。

这是gradlew assembleRelease --scan 的结果。它包含许多可能对调试有用的详细信息。

https://scans.gradle.com/s/sohrhovsc676e/

在 Android Studio 中，我转到“文件 -> 项目结构”并将我的 JDK 位置从

“C:\Program Files\Android\Android Studio\jre”（内嵌JDK）

到

“C:\Program Files\Java\jdk1.8.0_172”（JDK 8），我从here得到的。

这未能解决问题。

我还在我的系统路径变量中添加了“C:\Program Files\Java\jdk1.8.0_172\bin”。

我还将我的项目上传到 Github，以防有人需要查看。 https://github.com/vedantroy/recyclerview-test

另外，我之前尝试将implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 替换为implementation"org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"，但这也没有用。

编辑 1 -

我尝试将我的 Build Variant 切换为“发布”，然后构建一个 APK，这似乎可行。但是，我不确定这是否会产生与 gradlew assembleRelease 相同的结果

【问题讨论】：

这里有同样的错误。你有解决办法吗？

标签： android gradle kotlin android-gradle-plugin

【解决方案1】：

就我而言，这在 Java 更新后开始发生。原来 JRE 已更新，但 JDK 没有。

尝试：安装新的 JDK 更新，卸载旧版本，然后重新打开任何 shell/ps/cmd 会话/窗口。可能有必要杀死现有的 Gradle 守护程序，但它应该足够聪明，不会重复使用它们。再次尝试构建！

【讨论】：