Android : Gradle release build fail on preDex Stage:

when i try to do the release build using jenkins im getting following error, can some one help me to fix this issue. gradle-build-file

apply plugin: 'com.android.application'

android {
    compileSdkVersion 20
    buildToolsVersion "20.0.0"

    defaultConfig {
        applicationId "com.testt"
        minSdkVersion 16
        targetSdkVersion 20
        versionCode 1
        versionName "1.0"
    }

    signingConfigs {
        release {
            storeFile file("../keystore/keystore")
            storePassword "*****"
            keyAlias "****"
            keyPassword "****"
        }
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
            debuggable false
            zipAlign true
        }
        android.applicationVariants.all{ variant ->
            if (variant.buildType.name == 'release') {
                def apkName = "${campaignId}";
                apkName += "-" + variant.buildType.name;
                apkName += ".apk";
                println "$project.buildDir/apk/" + apkName
                variant.outputFile = file("$project.buildDir/apk/" + apkName)
            }
        }
    }

    productFlavors {

        festival {
            applicationId "${newAppId}"
            versionCode 20
            versionName "2.0"
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.code.gson:gson:2.2.+'
    compile 'commons-io:commons-io:2.4'
    compile 'com.android.support:support-v4:20.0.0'
    compile 'com.google.android.gms:play-services:4.3+'
}


proguard-pro file 

-keep class * extends java.util.ListResourceBundle {
    protected Object[][] getContents();
}

-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
    public static final *** NULL;
}

-keepnames @com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
    @com.google.android.gms.common.annotation.KeepName *;
}

-keepnames class * implements android.os.Parcelable {
    public static final ** CREATOR;
}




:app:clean UP-TO-DATE
    :app:preBuild
    :app:preFestivalReleaseBuild
    :app:checkFestivalReleaseManifest
    :app:preFestivalDebugBuild
    :app:prepareComAndroidSupportSupportV42000Library
    :app:prepareComGoogleAndroidGmsPlayServices4323Library
    :app:prepareFestivalReleaseDependencies
    :app:compileFestivalReleaseAidl
    :app:compileFestivalReleaseRenderscript
    :app:generateFestivalReleaseBuildConfig
    :app:generateFestivalReleaseAssets UP-TO-DATE
    :app:mergeFestivalReleaseAssets
    :app:generateFestivalReleaseResValues
    :app:generateFestivalReleaseResources
    :app:mergeFestivalReleaseResources
    :app:processFestivalReleaseManifest
    :app:processFestivalReleaseResources
    :app:generateFestivalReleaseSources
    :app:compileFestivalReleaseJavaNote: Some input files use or override a deprecated API.
    Note: Recompile with -Xlint:deprecation for details.

    :app:lintVitalFestivalRelease
    :app:compileFestivalReleaseNdk
    :app:preDexFestivalRelease FAILED

    FAILURE: Build failed with an exception.

    * What went wrong:
    Execution failed for task ':app:preDexFestivalRelease'.
    > com.android.ide.common.internal.LoggedErrorException: Failed to run command:
        /opt/android-sdk-linux/build-tools/20.0.0/dx --dex --output /var/lib/jenkins/jobs/Android-BaseTemplate/workspace/app/build/intermediates/pre-dexed/festival/release/classes-b64780b69b2491b2c1d0c3458c1b1c58c10a315f.jar /var/lib/jenkins/jobs/Android-BaseTemplate/workspace/app/build/intermediates/exploded-aar/com.google.android.gms/play-services/4.3.23/classes.jar
      Error Code:
        1


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

    BUILD FAILED