An-DJ opened a new issue, #9571:
URL: https://github.com/apache/apisix/issues/9571
### Current Behavior
Admin & control API ip cannot be changed and reloaded if its port is
unchanged.
### Expected Behavior
Admin & control API ip can be changed and hot reloaded successfully if its
port is unchanged.
### Error Logs
_No response_
### Steps to Reproduce
Take Admin API as an example:
1. Start APISIX with default configuration (Admin API ip 0.0.0.0, port 9180)
2. Change Admin API ip to `127.0.0.1` in `conf/config.yaml`
```
deployment:
admin:
admin_listen:
ip: 127.0.0.1
```
3. Reload APISIX configure by the command `apisix reload`
4. Failed with error.log
```
2023/05/29 19:41:49 [notice] 10743#10743: signal process started
2023/05/29 19:41:49 [emerg] 10653#10653: bind() to 127.0.0.1:9180 failed
(98: Address already in use)
2023/05/29 19:41:49 [emerg] 10653#10653: bind() to 127.0.0.1:9180 failed
(98: Address already in use)
2023/05/29 19:41:49 [emerg] 10653#10653: bind() to 127.0.0.1:9180 failed
(98: Address already in use)
2023/05/29 19:41:49 [emerg] 10653#10653: bind() to 127.0.0.1:9180 failed
(98: Address already in use)
2023/05/29 19:41:49 [emerg] 10653#10653: bind() to 127.0.0.1:9180 failed
(98: Address already in use)
2023/05/29 19:41:49 [emerg] 10653#10653: still could not bind()
```
### Environment
- APISIX version (run `apisix version`): 3.3.0
- Operating system (run `uname -a`): Ubuntu 18.04
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
openresty/1.21.4.1
- etcd version, if relevant (run `curl
http://127.0.0.1:9090/v1/server_info`):
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
- LuaRocks version, for installation issues (run `luarocks --version`):
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