help request: Some questions about error_page

[Lewisyixin]

Description

Apisix doesn't have plugins about error_page which is useful in some scene. And I tried the following 2 ways:

1. Add error_page config in http_server_configuration_snippet
   
   this way works well when there comes 5xx requests. But I found these 5xx requests could't be recorded in metrics(prometheus plugin)
2. Based on step 1, I add lua phase config
   
   And this time 5xx request successfully recorded in metrics

But I still have 2 questions:

1. Are there any risks in the configuration of step 2?
2. I found that there is error_page configurations in the 2.15 version code but removed in version 3(https://github.com/apache/apisix/blob/2.15.3/apisix/cli/ngx_tpl.lua#L574), so I just want to know why remove these error_page code?

Environment

• APISIX version (run apisix version): 3.5
• Operating system (run uname -a): 3.10.0-514.26.2.el7.x86_64
• OpenResty / Nginx version (run openresty -V or nginx -V): nginx version: openresty/1.21.4.2
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info): 3.5
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version): 2.3.0

[fanchangjifen]

response rewrite不能自定义error page吗