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kotlinlang

Hi one of our servers crashed last night with this error:

```Failed to start thread - pthread_create failed (EAGAIN) for attributes: stacksize: 512k, guardsize: 0k, detached. 
Exception in thread "HTTP-listener-11490-1" java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached 
at java.base/java.lang.Thread.start0(Native Method)

at java.base/java.lang.Thread.start(Thread.java:803) 
at java.base/java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:937) 
at java.base/java.util.concurrent.ThreadPoolExecutor.processWorkerExit(ThreadPoolExecutor.java:1005) 
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) 
at java.base/java.lang.Thread.run(Thread.java:834) ```

It definitely wasn't running out of memory. I'm on the Apache backend for HTTP4K. I have Xss set to 512k, could that be it? Any ideas what could be going wrong? Thanks