add debug log to print poolname

Author: catbro666

lib/resty/http_connect.lua

@@ -4,6 +4,7 @@ local ngx_re_sub = ngx.re.sub
 local ngx_re_find = ngx.re.find
 local ngx_log = ngx.log
 local ngx_WARN = ngx.WARN
+local ngx_DEBUG = ngx.DEBUG
 local to_hex = require("resty.string").to_hex
 local ffi_gc = ffi.gc
 local ffi_cast = ffi.cast
@@ -272,6 +273,8 @@ local function connect(self, options)
         -- with a plain http request the authorization is part of the actual request.
     end
 
+    ngx_log(ngx_DEBUG, "poolname: " .. poolname)
+
     -- do TCP level connection
     local tcp_opts = { pool = poolname, pool_size = pool_size, backlog = backlog }
     if proxy then