Error: Another program is already listening on a port that one of our HTTP servers is configured to

最近碰到supervisor任务restart重启后不生效，于是重启supervisor进程，发现报错如下：

Error: Another program is already listening on a port that one of our HTTP servers is configured to use.  Shut this program down first before starting supervisord.
For help, use /data/service/Python-2.7.10/bin/supervisord -h

修改端口和删除supervisord.sock文件都不起作用，于是杀掉supervisor起动正在执行的php和python程序，重启supervisor进程后生效。