The first two systems I worked with using InterSystems technology were a PDP-11 running M11+ and a VAX 11/750 running M/VX. Too many years ago to count! 😊
Since then I've used most, if not all, InterSystems products up to IRIS and HealShare today.
I'm italian living in Switzerland and I work as Senior Consultant at GAIVOTA consultin SA, we provide professional services for InterSystems and other technologies.
Curiosity: apart from DC, I don't have ANY social account! 😁
05/16/25-15:43:17:397 (11856) 2 Failed to allocate 882MB shared memory: 411MB global buffers, 300MB routine buffers
05/16/25-15:43:17:398 (11856) 2 Unable to allocate shared memory minimum of 128MB
It must be a very small system!
Maybe you are sending the HTTP request using an incorrect Content-Type HTTP header?
Check what Content-Type HTTP header the receiving end is expecting.
I had a similar issues with IRIS 2021.2.
In one case a class with an object reference calculated property failed to compile.
The workaround was to add %JSONINCLUDE = "OUTPUTONLY" to the property.
The second case was a class that contains a property (not calculated) that is an array of %Stream.GlobalBinary (that was not supported) and despite I added %JSONINCLUDE = "NONE" the class did not compile.
For this I got a quick fix modifying a library class.
My suggestion is first to to reproduce the issue with a VERY SIMPLE test case and test it using latest IRIS version 2025.1 and, whatever the test result is, report it to WRC including the result of your test using the latest IRIS version.