Android Studio - Execution failed for task ':app:transformClassesWithDexForDebug' - java.exe finished with non-zero exit value 2

Question

Lately nine out of ten of my builds fail with the following exception. I clean and rebuild the project, but to no avail. I have searched everywhere and tried the solutions shared on other similar questions - again no help. My Android Studio version is 2.0 Beta 5 with Gradle also at 2.0.0-beta5. Here is the exception that I receive:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2

* Try:
Run with --info or --debug option to get more log output.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesWithDexForDebug'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
Caused by: java.lang.RuntimeException: com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.builder.profile.Recorder$Block.handleException(Recorder.java:54)
at com.android.builder.profile.ThreadRecorder$1.record(ThreadRecorder.java:57)
at com.android.builder.profile.ThreadRecorder$1.record(ThreadRecorder.java:47)
at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:173)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:244)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:220)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:231)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:209)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
... 14 more
Caused by: com.android.build.api.transform.TransformException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.build.gradle.internal.transforms.DexTransform.transform(DexTransform.java:424)
at com.android.build.gradle.internal.pipeline.TransformTask$3.call(TransformTask.java:178)
at com.android.build.gradle.internal.pipeline.TransformTask$3.call(TransformTask.java:174)
at com.android.builder.profile.ThreadRecorder$1.record(ThreadRecorder.java:55)
... 23 more
Caused by: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.ide.common.internal.WaitableExecutor.waitForTasksWithQuickFail(WaitableExecutor.java:119)
at com.android.build.gradle.internal.transforms.DexTransform.transform(DexTransform.java:364)
... 26 more
Caused by: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.builder.core.AndroidBuilder.runDexer(AndroidBuilder.java:1443)
at com.android.builder.core.AndroidBuilder.preDexLibraryNoCache(AndroidBuilder.java:1633)
at com.android.builder.internal.compiler.PreDexCache.preDexLibrary(PreDexCache.java:119)
at com.android.builder.core.AndroidBuilder.preDexLibrary(AndroidBuilder.java:1588)
at com.android.build.gradle.internal.transforms.DexTransform$PreDexTask.call(DexTransform.java:474)
at com.android.build.gradle.internal.transforms.DexTransform$PreDexTask.call(DexTransform.java:428)
Caused by: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.builder.core.AndroidBuilder.runDexer(AndroidBuilder.java:1427)
... 5 more
Caused by: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at com.android.build.gradle.internal.process.GradleProcessResult.assertNormalExitValue(GradleProcessResult.java:43)
at com.android.builder.core.AndroidBuilder$2.call(AndroidBuilder.java:1435)
at com.android.builder.core.AndroidBuilder$2.call(AndroidBuilder.java:1427)
Caused by: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'' finished with non-zero exit value 2
at org.gradle.process.internal.DefaultExecHandle$ExecResultImpl.assertNormalExitValue(DefaultExecHandle.java:367)
at com.android.build.gradle.internal.process.GradleProcessResult.assertNormalExitValue(GradleProcessResult.java:41)
... 2 more


BUILD FAILED

Total time: 16.043 secs

Could anyone please provide any clues?

EDIT: Most other similar questions have answers suggesting there are conflicting dependencies, so here is my dependency tree. I don't see a conflict. Anything?:

+--- com.android.support:multidex:1.0.1
+--- com.android.support:appcompat-v7:23.1.1
|    \--- com.android.support:support-v4:23.1.1
|         \--- com.android.support:support-annotations:23.1.1
+--- com.android.support:cardview-v7:23.1.1
+--- project :circularreveal      
|    \--- com.nineoldandroids:library:2.4.0
\--- project :ColorPickerPreference

Answer 1

Upgrade to Java 1.8 and this issues should go away. I do not know exactly what cause the: java.util.concurrent.ExecutionException but upgrading to Java 1.8 has always fixed it for me.

java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.7.0_75\bin\java.exe'