wxbty opened a new issue, #9661:
URL: https://github.com/apache/apisix/issues/9661
### Current Behavior
When adding stream_routes for the redis protocol, if the limit-conn plugin
is used, an error will be reported
### Expected Behavior
created route successfully
### Error Logs
2023/06/14 17:35:07 [error] 30109#30109: *773 failed to run log_by_lua*:
/opt/linyao/apisix/apisix/plugins/limit-conn/init.lua:123: attempt to perform
arithmetic on field 'request_time' (a nil value)
stack traceback:
/opt/linyao/apisix/apisix/plugins/limit-conn/init.lua:123: in function
'phase_func'
/opt/linyao/apisix/apisix/plugin.lua:1134: in function 'run_plugin'
/opt/linyao/apisix/apisix/init.lua:1083: in function 'stream_log_phase'
log_by_lua(nginx.conf:108):2: in main chunk while prereading client
data, client: 127.0.0.1, server: 0.0.0.0:9100
2023/06/14 17:35:12 [error] 30113#30113: *2961 stream [lua] init.lua:106:
phase_func(): decrease_to record the connection leaving request while
prereading client data, client: 127.0.0.1, server: 0.0.0.0:9100
2023/06/14 17:35:12 [error] 30113#30113: *2961 failed to run log_by_lua*:
/opt/linyao/apisix/apisix/plugins/limit-conn/init.lua:123: attempt to perform
arithmetic on field 'request_time' (a nil value)
stack traceback:
/opt/linyao/apisix/apisix/plugins/limit-conn/init.lua:123: in function
'phase_func'
/opt/linyao/apisix/apisix/plugin.lua:1134: in function 'run_plugin'
/opt/linyao/apisix/apisix/init.lua:1083: in function 'stream_log_phase'
log_by_lua(nginx.conf:108):2: in main chunk while prereading client
data, client: 127.0.0.1, server: 0.0.0.0:9100
### Steps to Reproduce
1. Tcp dynamic proxy uses redis protocol
2. Create a route with the limit-conn plugin as follow
curl http://127.0.0.1:9180/apisix/admin/stream_routes/1 -H 'X-API-KEY:
edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
{
"plugins": {
"limit-conn": {
"conn": 5,
"burst": 0,
"default_conn_delay": 0.1,
"rejected_code": 503,
"key_type": "var",
"key": "remote_addr"
}
},
"upstream": {
"type": "none",
"nodes": {
"127.0.0.1:6379": 1
}
},
"protocol": {
"name": "redis"
}
}
'
3. Check the error log and find the error message
### Environment
APISIX version (run apisix version): master latest
Operating system (run uname -a): centos7
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):
3.5.0
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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