Illegal instruction (core dumped) in aws ec2

[guy-otonomo]

bash-5.1# lua
LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2020 Mike Pall. https://luajit.org/
JIT: ON SSE3 SSE4.1 BMI2 fold cse dce fwd dse narrow loop abc sink fuse
> json = require "rapidjson"
> print(json.encode({a=5}))
Illegal instruction (core dumped)

> uname -a
Linux 4e0e39d6702b 4.14.252-195.483.amzn2.x86_64 #1 SMP Mon Nov 1 20:58:46 UTC 2021 x86_64 Linux

Notes: we use rapidjson inside Kong.

• kong:2.4.1-alpine (with cmake-3.15.5-r0): works.
• kong:2.5.0-alpine (with cmake-3.21.3-r0): fails! (actually for any new version above 2.4.1).
• When running in Docker on Mac, with cmake-3.21.3-r0: works.

Will be happy to provide any more info.

[xpol]

I have no idea on that, but after a simple googling, I found this page maybe help: https://groups.google.com/g/OpenResty/c/EC_ohjV5ROA

I think it's due to incorrect configuration flags passed when you compile the LuaJIT. Have you tried loading other libraries?

And you can try to comment the SSE related lines https://github.com/xpol/lua-rapidjson/blob/master/src/rapidjson.cpp#L10-L14

See if it helps.

[guy-otonomo]

Well, not a simple search, because results are in Chinese 😅 Thanks for your help, it does seems to explain the issue (compiled version vs runtime version). Other plugins seem to work OK BTW.

Commenting out those lines, should be done before building rapidjson, right? (we install it via luarocks, so this is going to be a hard one). We should also try a machine in AWS that supports sse4_2.

Thanks again.