MacMini with macOS 10.5.4 ( 19E287) Kernel Panic running Apache Kafka with a lot of threads

Hi,

macOS 10.5.4 ( 19E287) Kernel Panic, 32 GByte of Ram, i7 , six cores.

Since yesterday I'm trying to do some test runs of a Java-based Console Application which uses Apache Kafka as a message broker. During the startup the java app creates quite a number of threads which are used to process incoming messages into Kafka and route them to their data sink destination.

Wenn the App has setup all the topics in Kafka - sooner or later the Mac just shuts down and the screen goes black. After a couple of seconds the system reboots again and asks me to send a report to Apple - which I did for five times now.

The output of ulimit shows this:

Atlas-Mini-3:MessageHubEventManagement marxfr$ ulimit -a

core file size (blocks, -c) 0

data seg size (kbytes, -d) unlimited

file size (blocks, -f) unlimited

max locked memory (kbytes, -l) unlimited

max memory size (kbytes, -m) unlimited

open files (-n) 524288

pipe size (512 bytes, -p) 1

stack size (kbytes, -s) 8192

cpu time (seconds, -t) unlimited

max user processes (-u) 5568

virtual memory (kbytes, -v) unlimited

Is start the JVM with 4GB Heapsize and the the -XX:-MaxFDLimit option.

I'm pretty sure this is a serious bug in MacOS. It would be ok if the OS kills the Java App but a Kernel Panic should NOT happen.

Cheers,

Frank