CircleCI 2.0 : Error unmarshaling return header; nested exception is:

Question

I have created some espresso UI tests. The tests are working fine locally(emulator and real device). But when I am trying to run the UI test on CircleCI. I am getting this error log

Task :app:compileFossDebugAndroidTestKotlin Compilation with Kotlin compile daemon was not successful java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:

Unable to clear jar cache after compilation, maybe daemon is already down: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused (Connection refused) Could not connect to kotlin daemon. Using fallback strategy.

Picked up JAVA_TOOL_OPTIONS: -Xms512m

Task :app:compileFossDebugAndroidTestKotlin FAILED

FAILURE: Build failed with an exception.

What went wrong: Execution failed for task ':app:compileFossDebugAndroidTestKotlin'.

More detail regarding error log is available here

Here is my config.yml file for circleci with run-ui-tests job

run-ui-tests:
    docker:
      - image: circleci/android@sha256:5cdc8626cc6f13efe5ed982cdcdb432b0472f8740fed8743a6461e025ad6cdfc
    environment:
      JVM_OPTS: -Xmx2048m
      GRADLE_OPTS: -Xmx1536m -XX:+HeapDumpOnOutOfMemoryError -Dorg.gradle.caching=true -Dorg.gradle.configureondemand=true -Dkotlin.compiler.execution.strategy=in-process -Dkotlin.incremental=false
    steps:
      - checkout
      - run:
          name: ANDROID_HOME
          command: echo "sdk.dir="$ANDROID_HOME > local.properties
      - run:
          name: restore files from ENV
          command: |
            echo $ROCKET_JKS_BASE64 | base64 --decode > Rocket.jks
            echo $ROCKET_PLAY_JSON | base64 --decode > app/rocket-chat.json
      - run:
          name: checkout Rocket.Chat.Kotlin.SDK
          command: git clone https://github.com/RocketChat/Rocket.Chat.Kotlin.SDK.git ../Rocket.Chat.Kotlin.SDK
      - restore_cache:
          key: kotlin-sdk-{{ .Revision }}
      - restore_cache:
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
      - run:
          name: Accept licenses
          command: yes | sdkmanager --licenses || true
      - run:
          name: Download Dependencies
          command: ./gradlew androidDependencies
      - save_cache:
          paths:
            - ~/.gradle
          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
      - run:
          name: Setup emulator
          command: sdkmanager "system-images;android-22;default;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-22;default;armeabi-v7a"
      - run:
          name: Launch emulator
          command: export LD_LIBRARY_PATH=${ANDROID_HOME}/emulator/lib64:${ANDROID_HOME}/emulator/lib64/qt/lib && emulator64-arm -avd test -noaudio -no-boot-anim -no-window -accel auto -verbose
          background: true
      - run:
          name: Wait emulator
          command: |
            # wait for it to have booted
            circle-android wait-for-boot
            # unlock the emulator screen
            sleep 30
            adb shell input keyevent 82
      - run:
          name: Run EspressoTests
          command: ./gradlew connectedAndroidTest
      - store_artifacts:
          path: app/build/reports
          destination: reports
      - store_test_results:
          path: app/build/test-results

gradle.properties

android.enableJetifier=true
android.useAndroidX=true
org.gradle.jvmargs=-Xmx1536m

Other Configuration

compileSdk version           : 28
targetSdk version            : 28
kotlin version               : '1.3.31'

The project is having 2 flavors: foss and play and 2 build types: debug and release

I have tried all possible solution but none is working. Any help will be appreciated. Thanks

m3g4tr0n m3g4tr0n · Accepted Answer · 2020-05-22T10:06:33

Adding this line to config.yml helped me in avoiding this error

GRADLE_OPTS: -Xmx1536m -XX:+HeapDumpOnOutOfMemoryError -Dorg.gradle.caching=true -Dorg.gradle.configureondemand=true -Dkotlin.compiler.execution.strategy=in-process -Dkotlin.incremental=false

more info here : https://github.com/circleci/circleci-docs/issues/2945#issuecomment-471637158

CircleCI 2.0 : Error unmarshaling return header; nested exception is:

3 Answers