panic in ibmmqotel

[theewarav]

Hello,

My environment is MacOS arm 64. Go 1.23.0, mq-golang 5.6.1. My application works fine with 5.6.0. My application connects to many queue managers and concurrently get messages from queues. I enabled otel and got panic: concurrent map writes.

From the code https://github.com/ibm-messaging/mq-golang/blob/master/ibmmqotel/mqiotel.go line 513, otelGetTraceBefore function writes a new entry to objectOptionsMap defined as a global variable at line 68, without a lock.

Could you please give some advice?

Thank you,
Theewarav

[ibmmqmet]

Thanks for finding that. It's too easy to forget that Go maps are not concurrent-safe (unlike some other languages' collection classes). There's no real workround without code changes. I'll add locking for the next update.