彻底停止oozie的tomcat的进程，然后删除pid文件
rm -rf /export/servers/oozie-4.1.0-cdh5.14.0/oozie-server/temp/oozie.pid
非正常停止服务启动报错为:
Existing PID file found during start.
Removing/clearing stale PID file.
oozie 启动过程中--- Existing PID file found during start. Removing/clearing stale PID file.
原文：https://www.cnblogs.com/roujiamo/p/10116013.html