build failing during merge resources with Android Gradle plugin 3.3.0

Question

I have a lot of different flavors for my build that have specific resources and I don't want to clutter my src directory in my project with a bunch of flavor-specific directories, so I add the source sets from another folder in my project prior to the mergeResources task (mergeResources.doFirst). This has always worked for the past several versions of the Android Gradle plug-in (3.1.0-3.2.0 and some of the 3.3.0-alpha versions), but at a certain point, the 3.3.0-alpha AGP started causing build failures during this mergeResources task.

Now I keep getting:

BUILD FAILED in 35s 16 actionable tasks: 15 executed, 1 up-to-date Exception in thread "ForkJoinPool.commonPool-worker-6" java.lang.IllegalStateException: AAPT Process manager cannot be shut down while daemons are in use at com.android.builder.internal.aapt.v2.Aapt2DaemonManager.shutdown(Aapt2DaemonManager.kt:96) at com.android.build.gradle.internal.res.namespaced.RegisteredAaptService.shutdown(Aapt2DaemonManagerService.kt:61) at com.android.build.gradle.internal.workeractions.WorkerActionServiceRegistry$shutdownAllRegisteredServices$1$1.run(WorkerActionServiceRegistry.kt:96) at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402) at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

My stacktrace is:

Execution failed for task ':app:mergeMainReleaseResources'. java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2InternalException: AAPT2 aapt2-3.3.0-alpha13-5013011-windows Daemon #0: Unexpected error during compile 'C:UsersAlexDocumentsWorkAndroidprojectappproductio n_resourcescategoriesfitness esdrawable-xxxhdpiackground_4.png', attempting to stop daemon. This should not happen under normal circumstances, please file an issue if it does.

Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:mergeMainReleaseResources'. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:110) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:77) at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51) at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59) at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54) at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101) at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44) at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91) at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54) at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43) at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.run(EventFiringTaskExecuter.java:51) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174) at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31) at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:46) at org.gradle.execution.taskgraph.LocalTaskInfoExecutor.execute(LocalTaskInfoExecutor.java:42) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:277) at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareWorkItemExecutor.execute(DefaultTaskExecutionGraph.java:262) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:135) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:130) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.execute(DefaultTaskPlanExecutor.java:200) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.executeWithWork(DefaultTaskPlanExecutor.java:191) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$ExecutorWorker.run(DefaultTaskPlanExecutor.java:130) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)

Caused by: org.gradle.internal.UncheckedException: java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2InternalException: AAPT2 aapt2-3.3.0-alpha13-5013011-windows Daemon #0: Unexpected error during compile 'C:UsersAlex DocumentsWorkAndroidprojectappproduction_resourcescategoriesfitness esdrawable-xxxhdpiackground_4.png', attempting to stop daemon. This should not happen under normal circumstances, please file an issue if it does. at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:63) at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:40) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:76) at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:50) 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.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:131) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300) at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292) at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174) at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:120) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:99) ... 31 more Caused by: java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2InternalException: AAPT2 aapt2-3.3.0-alpha13-5013011-windows Daemon #0: Unexpected error during compile 'C:UsersAlexDocumentsWorkAndroidprojectapp production_resourcescategoriesfitness esdrawable-xxxhdpiackground_4.png', attempting to stop daemon. This should not happen under normal circumstances, please file an issue if it does. at com.android.ide.common.workers.ExecutorServiceAdapter.close(ExecutorServiceAdapter.kt:56) at com.android.build.gradle.internal.aapt.WorkerExecutorResourceCompilationService.close(WorkerExecutorResourceCompilationService.kt:67) at com.android.build.gradle.tasks.MergeResources.doFullTaskAction(MergeResources.java:268) at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:106) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73) ... 42 more

Caused by: com.android.builder.internal.aapt.v2.Aapt2InternalException: AAPT2 aapt2-3.3.0-alpha13-5013011-windows Daemon #0: Unexpected error during compile 'C:UsersAlexDocumentsWorkAndroidprojectappproduction_resourcescategoriesfitness esdrawable-xxxhdpiackground_4.png', attempting to stop daemon. This should not happen under normal circumstances, please file an issue if it does. at com.android.builder.internal.aapt.v2.Aapt2Daemon.handleError(Aapt2Daemon.kt:148) at com.android.builder.internal.aapt.v2.Aapt2Daemon.compile(Aapt2Daemon.kt:88) at com.android.builder.internal.aapt.v2.Aapt2DaemonManager$LeasedAaptDaemon.compile(Aapt2DaemonManager.kt:170) at com.android.build.gradle.internal.res.Aapt2CompileWithBlameRunnable$run$1.invoke(Aapt2CompileWithBlameRunnable.kt:37) at com.android.build.gradle.internal.res.Aapt2CompileWithBlameRunnable$run$1.invoke(Aapt2CompileWithBlameRunnable.kt:28) at com.android.build.gradle.internal.res.namespaced.Aapt2DaemonManagerService.useAaptDaemon(Aapt2DaemonManagerService.kt:71) at com.android.build.gradle.internal.res.namespaced.Aapt2DaemonManagerService.useAaptDaemon$default(Aapt2DaemonManagerService.kt:69) at com.android.build.gradle.internal.res.Aapt2CompileWithBlameRunnable.run(Aapt2CompileWithBlameRunnable.kt:34) at com.android.ide.common.workers.ExecutorServiceAdapter$submit$submission$1.run(ExecutorServiceAdapter.kt:39)

Caused by: java.io.IOException: AAPT2 process unexpectedly exit. Error output: at com.android.builder.internal.aapt.v2.Aapt2DaemonImpl$WaitForTaskCompletion.err(Aapt2DaemonImpl.kt:309) at com.android.builder.internal.aapt.v2.Aapt2DaemonImpl$processOutput$1.err(Aapt2DaemonImpl.kt:75) at com.android.utils.GrabProcessOutput$1.run(GrabProcessOutput.java:104)

I thought maybe the PNG file was corrupted or incorrectly labeled, but I've run it through a whole bunch of conversions and I get the same error.

During testing, it works fine, but during the release builds is when I get this error. I've resorted to building using AS 3.2 and AGP 3.2.0 for my production builds, which works fine. Also, this

Answer 1

Updated 19th April, 2019

This issue has been fixed in Android Gradle Plugin 3.4.0.

After upgrading to Android Studio 3.4.0, the temporary fix suggested in the original answer can be removed. Hurray!

Original

This is a bug in AAPT2 in Android Gradle Plugin 3.3.0, when building a project with larger png's (around 2-3 mb and up).

@akong9759 created an issue for this on Googles issue tracker and it has been fixed.

https://issuetracker.google.com/issues/117900475

The problem has been fixed in Android Gradle Plugin 3.5.0-alpha03 and the fix is scheduled to be released in version 3.4.0.

A temporary fix for Android Gradle Plugin 3.3.0 has been suggested on the issue. Add the following to the project build.gradle:

allprojects {
    // Workaround for https://issuetracker.google.com/117900475
    // Remove when upgrading to AGP 3.4 or higher.
    configurations.matching { it.name == '_internal_aapt2_binary' }.all { config ->
        config.resolutionStrategy.eachDependency { details ->
            details.useVersion("3.5.0-alpha03-5252756")
        }
    }
}