GhangZh opened a new issue, #11665:
URL: https://github.com/apache/apisix/issues/11665

   ### Description
   
   I've been having some problems with apisix lately:
   1. apisix connection to etcd timeout, resulting in apisix-ingress-controller 
sync cluster changes to apisix timeout keep retrying, and then apisix cpu 
soaring high!
   ```bash
   2024/10/16 11:26:11 [warn] 72#72: *509452782 stream [lua] 
health_check.lua:90: report_failure(): update endpoint: http://xxxxxx:2379/ to 
unhealthy, context: ngx.timer
   2024/10/16 11:26:11 [warn] 68#68: *509030123 [lua] health_check.lua:90: 
report_failure(): update endpoint: http://xxxxxx:2379/ to unhealthy, context: 
ngx.timer
   2024/10/16 11:26:11 [warn] 97#97: *509293272 stream [lua] v3.lua:647: 
request_chunk(): http://xxxxx:2379/: connection timed out. Retrying, context: 
ngx.timer
   ```
   
   apisix configmap
   
   ```yaml
       nginx_config:                     # config for render the template to 
genarate nginx.conf
         error_log: "/dev/stderr"
         error_log_level: "warn"         # warn,error
         worker_rlimit_nofile: 60000     # the number of files a worker process 
can open, should be larger than worker_connections
         event:
           worker_connections: 60000
   
         http:
           lua_shared_dict:
             prometheus-metrics: 512m
           enable_access_log: true
           keepalive_timeout: 90s         # timeout during which a keep-alive 
client connection will stay open on the server side.
           client_header_timeout: 600s     # timeout for reading client request 
header, then 408 (Request Time-out) error is returned to the client
           client_body_timeout: 600s       # timeout for reading client request 
body, then 408 (Request Time-out) error is returned to the client
           send_timeout: 600s              # timeout for transmitting a 
response to the client.then the connection is closed
           client_max_body_size: 30720m
           underscores_in_headers: "on"   # default enables the use of 
underscores in client request header fields
           real_ip_header: "X-Real-IP"    # 
http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
           real_ip_from:                  # 
http://nginx.org/en/docs/http/ngx_http_realip_module.html#set_real_ip_from
             - 127.0.0.1
             - 'unix:'
         http_configuration_snippet:      |
           sendfile on;
           tcp_nopush on;
           tcp_nodelay on;
           client_header_buffer_size 16m;
           large_client_header_buffers 4 16m;
           client_body_buffer_size 64m;
           proxy_buffering off;
           proxy_buffers 4 10m;
           proxy_buffer_size 10m;
           proxy_busy_buffers_size 10M;
           proxy_max_temp_file_size 0;
           proxy_connect_timeout 30s;
           proxy_send_timeout   600s;
           proxy_read_timeout   600s;
           proxy_cache off;
           proxy_request_buffering off;
         http_server_configuration_snippet:      |
           set $router_name -;
           set $upstream_name -;
           proxy_ignore_client_abort on;
   
       etcd:
         host:                                 # it's possible to define 
multiple etcd hosts addresses of the same etcd cluster.
           - "http://xxxxx:2379";             # multiple etcd address
           - "http://xxxxx:2379";             # multiple etcd address
           - "http://xxxxx:2379";             # multiple etcd address
         prefix: "/apisix"     # apisix configurations prefix
         timeout: 30   # 30 seconds
   ```
   
   
   ### Environment
   
   - APISIX version (run `apisix version`): 2.13.0
   - Operating system (run `uname -a`): 3.10.0-862.14.4.el7.x86_64
   - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
   - etcd version, if relevant (run `curl 
http://127.0.0.1:9090/v1/server_info`): 3.4.13
   - 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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