org.gradle.process.internal.ExecException:

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0\bin\java.exe'' finished with non-zero exit value 2

First of all you should try to list your dependencies with gradle :MODULE:dependencies Check if there are libraries conflicts ( same library but different version ). In this case i supose you should exclude support library module from Facebook SDK.

compile ('com.facebook.android:facebook-android-sdk:3.23.1'){
        exclude group: 'com.google.android', module: 'support-v4'
    }