### Issue description current ``` worker_shutdown_timeout: 3s # timeout for a graceful shutdown of worker processes ``` https://github.com/apache/incubator-apisix/blob/master/conf/config.yaml#L104 recommendation ``` worker_shutdown_timeout: 240s # timeout for a graceful shutdown of worker processes ``` reasons: 1. 3 seconds is too short, once a graceful restart will quickly disconnect the long connection 2. The default value for nginx ingress is 240 seconds.  ### Environment * apisix version (cmd: `apisix version`): * OS: ### Minimal test code / Steps to reproduce the issue 1. 2. 3. ### What's the actual result? (including assertion message & call stack if applicable) ### What's the expected result?
Issue description
current
https://github.com/apache/incubator-apisix/blob/master/conf/config.yaml#L104
recommendation
reasons:
Environment
apisix version):Minimal test code / Steps to reproduce the issue
What's the actual result? (including assertion message & call stack if applicable)
What's the expected result?