anchor.diff:      chmod a+x /opt/work/jenkins/slave.groovy && \
       wget http://repo.jenkins-ci.org/releases/org/jenkins-ci/main/remoting/3.14/remoting-3.14.jar && \
       mv remoting-3.14.jar ${JENKINS_HOME} && \
  -#spark 2.1.3 2.2.2 2.3.2 2.4.0
  +
  +#spark 2.1.3 2.2.2 2.3.2 2.4.3
       wget http://archive.apache.org/dist/spark/spark-2.1.3/spark-2.1.3-bin-hadoop2.7.tgz && \
       tar -xf spark-2.1.3-bin-hadoop2.7.tgz -C /opt/work && \
       rm spark-2.1.3-bin-hadoop2.7.tgz && \
  
positive.code: ENV SPARK_2_1_HOME      /opt/work/spark-2.1.3
  ENV SPARK_2_2_HOME      /opt/work/spark-2.2.2
  ENV SPARK_2_3_HOME      /opt/work/spark-2.3.2
  ENV SPARK_2_4_HOME      /opt/work/spark-2.4.0
  ENV PATH                $SCALA_HOME/bin:${JAVA_HOME}/bin:${CONDA_HOME}/bin:${PATH}
  ENV TORCH_VERSION       d03a42834bb1b674495b0c42de1716b66cc388f1
  ENV TORCH_HOME		/opt/work/torch
  ENV CAFFE_HOME      	/opt/work/caffe
  ENV PATH                ${TORCH_HOME}/install/bin:${JAVA_HOME}/bin:${CONDA_HOME}/bin:${PATH}
  ENV LANG                en_US.UTF-8
  ENV LC_ALL              en_US.UTF-8
  
negative.code:     tar -xf spark-2.3.2-bin-hadoop2.7.tgz -C /opt/work && \
      rm spark-2.3.2-bin-hadoop2.7.tgz && \
      ln -s /opt/work/spark-2.3.2-bin-hadoop2.7 ${SPARK_2_3_HOME} && \
      wget http://archive.apache.org/dist/spark/spark-2.4.3/spark-2.4.3-bin-hadoop2.7.tgz && \
      tar -xf spark-2.4.3-bin-hadoop2.7.tgz -C /opt/work && \
      rm spark-2.4.3-bin-hadoop2.7.tgz && \
      ln -s /opt/work/spark-2.4.3-bin-hadoop2.7 ${SPARK_2_4_HOME} && \
  #cmake
      wget https://cmake.org/files/v3.12/cmake-3.12.1.tar.gz && \
      tar xf cmake-3.12.1.tar.gz && \
  