From 95ba84a69e65da36a6b86eda1208bc248746cd91 Mon Sep 17 00:00:00 2001
From: lijie3 <lijie3@360.cn>
Date: Fri, 31 Mar 2023 10:07:35 +0800
Subject: [PATCH 1/3] fix tcp 502 error

---
 rootfs/etc/nginx/lua/tcp_udp_configuration.lua | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
index 85864b45b..e93b80db7 100644
--- a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
+++ b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
@@ -1,5 +1,6 @@
 local ngx = ngx
 local tostring = tostring
+local cjson = require("cjson.safe")
 -- this is the Lua representation of TCP/UDP Configuration
 local tcp_udp_configuration_data = ngx.shared.tcp_udp_configuration_data
 
@@ -37,6 +38,14 @@ function _M.call()
     return
   end
 
+   _, err = cjson.decode(backends)
+
+  if err then
+    ngx.log(ngx.ERR, "could not parse backends data: ", err)
+    return
+  end
+
+
   local success, err_conf = tcp_udp_configuration_data:set("backends", backends)
   if not success then
     ngx.log(ngx.ERR, "dynamic-configuration: error updating configuration: " .. tostring(err_conf))

From 0853562bc90af52d78ecd470d4a0105ea022f427 Mon Sep 17 00:00:00 2001
From: lijie <lijiecm@gmail.com>
Date: Wed, 14 Jun 2023 09:59:48 +0800
Subject: [PATCH 2/3] fix tcp 502 error for parse tcp backend data

---
 rootfs/etc/nginx/lua/tcp_udp_configuration.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
index e93b80db7..caf6bffff 100644
--- a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
+++ b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
@@ -38,7 +38,7 @@ function _M.call()
     return
   end
 
-   _, err = cjson.decode(backends)
+   local _, err = cjson.decode(backends)
 
   if err then
     ngx.log(ngx.ERR, "could not parse backends data: ", err)

From a8749d4fec1a5865bbb71e75339ee1cdba44a730 Mon Sep 17 00:00:00 2001
From: lijie <lijiecm@gmail.com>
Date: Wed, 14 Jun 2023 10:26:15 +0800
Subject: [PATCH 3/3] fix tcp 502 error for parse tcp backend data

---
 rootfs/etc/nginx/lua/tcp_udp_configuration.lua | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
index caf6bffff..f191454fa 100644
--- a/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
+++ b/rootfs/etc/nginx/lua/tcp_udp_configuration.lua
@@ -38,10 +38,10 @@ function _M.call()
     return
   end
 
-   local _, err = cjson.decode(backends)
+  local _, backends_err = cjson.decode(backends)
 
-  if err then
-    ngx.log(ngx.ERR, "could not parse backends data: ", err)
+  if backends_err then
+    ngx.log(ngx.ERR, "could not parse backends data: ", backends_err)
     return
   end