stack overflow when requiring a luarocks module

[openresty]

stack overflow when requiring a luarocks module

[agentzh]

We cannot reproduce this on our side. Could you please provide more information regarding your OS name, OS version, nginx version, ngx_lua's version, luarocks' version, and etc. Thank you.

[outrace]

I can reproduce this in my side.
If change the test.lua to:

--test.lua
require("XXX") ---not local xxx = require("XXX")

that will work fine.

luajit2.0-bata6
ubuntu 10.04
nginx 8.54
ngx_lua 0.16rc3

[outrace]

我再用中文说一次吧。
就是当调用一个module的时候
使用
local mdl = require("Mdl") 就会出错，返回200，但是是空白。
直接require("Mdl") 的话。就可以调用到 Mdl这个模块

所以顺便请教一下，如何进行调试啊？错误信息既不再页面显示，也不再nginx的error log里。
我现在只能模拟ngx的变量，然后用命令行 luajit filename.lua 来debug，挺痛苦的。

[agentzh]

Regarding debugging, use lua's print function will emit outputs to error.log at the notice log level. Also, there's ngx.log() function that you can use to debug your Lua code. To send error messages to the web page output, just use pcall at the top level of your lua script, and ngx.print() it out to the response body.

[golgote]

I have had the same problem when I used luarocks, there was a stack overflow. This was with cache off, I didn't test with cache on.

I think it's because Luarocks might do something to the "require" function that the Lua Nginx module doesn't like.
I will try to test with the latest versions of every components and report.

[agentzh]

On Wed, Jun 22, 2011 at 6:09 PM, golgote
[email protected]
wrote:

I think it's because Luarocks might do something to the "require" function that the Lua Nginx module doesn't like.
I will try to test with the latest versions of every components and report.

Great! Looking forward to your results :D

To be honest, we haven't used luarocks in our apps yet.

Thanks!
-agentzh

[golgote]

Hi Agentzh,
I tested with latest LuaRocks 2.0.4.1, nginx 1.0.4 and today's snapshot of Lua-nginx-module and the problem is still here (although I now find the error log much better looking, thank you :) )

2011/06/29 20:31:39 [error] 12547#0: *8 lua handler aborted: runtime error: /usr/local/share/lua/5.1/luarocks/path.lua:244: stack overflow, client: 123.456.789.123, server: example.com, request: "GET /info.lua HTTP/1.1", host: "example.com"

Hope this helps, don't hesitate to ask for more info if you need.
Thanks.

[agentzh]

On Thu, Jun 30, 2011 at 2:38 AM, golgote
[email protected]
wrote:

Hi Agentzh,
I tested with latest LuaRocks 2.0.4.1, nginx 1.0.4 and today's snapshot of Lua-nginx-module and the problem is still here (although I now find the error log much better looking, thank you :) )

2011/06/29 20:31:39 [error] 12547#0: *8 lua handler aborted: runtime error: /usr/local/share/lua/5.1/luarocks/path.lua:244: stack overflow, client: 123.456.789.123, server: example.com, request: "GET /info.lua HTTP/1.1", host: "example.com"

Thanks for the info. We'll look into this in the near future :)

Thanks!
-agentzh

[agentzh]

I looked into this today, and could not reproduce this with the latest version of LuaRocks (2.0.4.1) and ngx_lua (v0.2.1rc3), on either Linux or Mac OS X. Here records my experiences:

http://openresty.org/#UsingLuaRocks

Please tell us if it works for you too or if I'm doing something different from you :)

[agentzh]

Okay...I've reproduced this problem by disabling lua_code_cache.

[agentzh]

I think I've already fixed this issue in git master, could you please try it out on your side? Thanks!

[agentzh]

consider it resolved.

[golgote]

Hi Agentzh, I cannot test right now, but I'll let you know if I find any other issues related as soon as I can.
Thanks for the fix.

[agentzh]

On Thu, Aug 11, 2011 at 7:27 PM, golgote
[email protected]
wrote:

Hi Agentzh, I cannot test right now, but I'll let you know if I find any other issues related as soon as I can.
Thanks for the fix.

Looking forward to your results ;)

Best,
-agentzh