LuaEngine error crashed ntopng GUI

[sp-heinrichsra]

Environment:

• OS name: Ubuntu
• OS version: 20.04.5 LTS
• Architecture: 5.4.0-136-generic x153-Ubuntu SMP Thu Nov 24 15:56:58 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
• ntopng version/revision: ntopng Enterprise XL v.5.5.230112

What happened:
After a while (seems to random) the ntopng GUI crashed with the following error:
ntopng[239968]: 12/Jan/2023 15:31:37 [LuaEngine.cpp:1329] WARNING: Script failure [/usr/share/ntopng/scripts/lua/flows_stats.lua][/usr/share/ntopng/scripts/lua/modules/lua_utils_print.lua:174: attempt to index a nil value (field '?')]

Do a "service ntopng restart" whithout success: immediate crashed again:
ntopng[257409]: 12/Jan/2023 16:13:10 [LuaEngine.cpp:1329] WARNING: Script failure [/usr/share/ntopng/scripts/lua/flows_stats.lua][/usr/share/ntopng/scripts/lua/modules/lua_utils_print.lua:174: attempt to index a nil value (field '?')]

Do a reboot of the server -> Crashed again
12/Jan/2023 16:18:39 [LuaEngine.cpp:1329] WARNING: Script failure [/usr/share/ntopng/scripts/lua/flows_stats.lua][/usr/share/ntopng/scripts/lua/modules/lua_utils_print.lua:174: attempt to index a nil value (field '?')]

How did you reproduce it?
Most likely by choosing the ZMQ Interface in the dropdown of showing the Flows/Live:
ntopng[1346]: 12/Jan/2023 16:15:46 [ZMQCollectorInterface.cpp:263] Collecting flows on tcp://:5557c
ntopng[1346]: 12/Jan/2023 16:15:46 [ZMQCollectorInterface.cpp:263] Collecting flows on tcp://:5556c

Debug Information:

[MatteoBiscosi]

Hi @sp-heinrichsra i pushed a possible fix, however i'm not able to reproduce the issue, so please let me know if this patch fixed the issue or not

[sp-heinrichsra]

Hello Matteo, I will check it further the next days and send you an update on this. Atm I cannot see an error but I was only on short session at our ntop system. Thanks Ralf Mit freundlichen Grüßen / Kind regards Ralf Heinrichs Senior Network Architect Service Engineering [cid:qbeyond_Cloud_Solutions_Logo_signatur_4c8cfa21-6e32-44a5-b9e2-91ec21e8af43.png] Direkt: T +49 731 920 13 - 240<tel:+4973192013240> E ***@***.******@***.***> Zentrale: T +49 731 92013 - 0<tel:+49731920130> F +49 731 92013 - 290<tel:+4973192013290> E ***@***.******@***.***> Büroanschrift: Lise-Meitner-Straße 5 89081 Ulm Firmensitz q.beyond Cloud Solutions GmbH Richard-Byrd-Str. 4, 50829 Köln Geschäftsführung: Thies Rixen, Sönke Eschke, Tatjana Bratina Registergericht: Amtsgericht Köln, HRB 107825 www.qbeyond-cloud-solutions.de<http://www.qbeyond-cloud-solutions.de> [cid:banner_rebranding_sp_307d863c-7297-454a-8ddd-bc3944cd9d04.jpg]<https://www.qbeyond-cloud-solutions.de/faq/> Von: Matteo Biscosi ***@***.***> Gesendet: Freitag, 13. Januar 2023 17:14 An: ntop/ntopng ***@***.***> Cc: Ralf Heinrichs ***@***.***>; Mention ***@***.***> Betreff: Re: [ntop/ntopng] LuaEngine error crashed ntopng GUI (Issue #7097) Hi @sp-heinrichsra<https://github.com/sp-heinrichsra> i pushed a possible fix, however i'm not able to reproduce the issue, so please let me know if this patch fixed the issue or not — Reply to this email directly, view it on GitHub<#7097 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AKHCO4Q3WAP4KC5TTN7RIULWSF5NDANCNFSM6AAAAAATZMARAQ>. You are receiving this because you were mentioned.Message ID: ***@***.******@***.***>>

[sp-heinrichsra]

After some tests I cannot re-produce the error anylonger.
So this issue seems to fixed from my point of view.