crontab执行feat_gen.sh时，报错找不到pyspark module
解决办法：在bash脚本中添加source ~/.bash_profile这一行在行首。其中在~/.bash_profile中配置好PATH和PYTHONPATH（把$SPARK_HOME下的python加到PYTHONPATH中即可）

feat_gen.sh:

source ~/.bash_profile

python3 ~/cust_loss_feature/pipeline.py 1>~/cust_loss_feature/exe.log 2>~/cust_loss_feature/err.log

在~/.bash_profile中：

export PATH=$SPARK_HOME/bin:$PATH
export PYTHONPATH=$SPARK_HOME/python/:$SPARK_HOME/python/lib/py4j-0.10.7-src.zip:$PYTHONPATH

参考：

http://cn.voidcc.com/question/p-atfauqqw-be.html

https://blog.csdn.net/Apache_Jerry/article/details/108010320