anchor.diff:  COPY --from=bigdl /opt/requirement.yml /ppml/trusted-realtime-ml/java/work/benchmark/requirement.yml
   
   RUN apt-get update --fix-missing && \
  +    env DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get install -y tzdata && \
       apt-get install -y apt-utils vim curl nano wget unzip maven git tree && \
       apt-get install -y libsm6 make build-essential && \
       apt-get install -y autoconf gawk bison libcurl4-openssl-dev python3-protobuf libprotobuf-c-dev protobuf-c-compiler && \
  
positive.code: ARG SPARK_VERSION=3.1.2
  
  # stage.1 graphene
  FROM ubuntu:18.04 AS graphene
  ARG GRAPHENE_BRANCH=branch-1.2-rc1
  RUN env DEBIAN_FRONTEND=noninteractive apt-get update && \
      env DEBIAN_FRONTEND=noninteractive apt-get install -y \
  
negative.code: 
  
  # stage.4 ppml
  FROM ubuntu:20.04
  ARG BIGDL_VERSION
  ARG SPARK_VERSION
  ARG SCALA_VERSION=2.12
  