错误:以非零退出值2完成

我在我的应用程序中导入了一个模块.当我尝试运行它时，控制台显示此错误:**错误:任务:app:dexDebug"执行失败.

i've imported a module in my application. When i try to run it, console show me this error: **Error:Execution failed for task ':app:dexDebug'.

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command'/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home/bin/java'' 以非零退出值 2** 结束

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home/bin/java'' finished with non-zero exit value 2**

我有 2 个 gradle.

I've 2 gradle.

第一级(我的申请)

apply plugin: 'test.test.myapplication'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
    applicationId "alo.com.geoapp"
    minSdkVersion 8
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
productFlavors {
}

}dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.3'
compile files('libs/gson-2.2.2.jar')
compile project(':sdktools')}

2nd gradle(导入模块)

2nd gradle (module imported)

apply plugin: 'com.android.library'
android {
compileSdkVersion 21
buildToolsVersion "20.0.0"
defaultConfig {
    minSdkVersion 8
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
    }
}
}


dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile files('libs/SKMaps.jar')
compile 'com.google.code.gson:gson:2.2.4'
compile 'com.google.guava:guava:18.0'
compile 'joda-time:joda-time:2.4'}

我已经尝试更新我的 jdk(从 7.* 到 8.*)，但没有解决.

i've already tried to update my jdk (from 7.* to 8.*), but not resolve.

谢谢！