pkg/54619: openjdk11: semaphore limit reached

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         54619
>Category:       pkg
>Synopsis:       openjdk11: semaphore limit reached
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 15 14:30:00 +0000 2019
>Originator:     Thomas Klausner
>Release:        NetBSD 9.99.17
>Organization:
Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
>Environment:
	
	
Architecture: x86_64
Machine: amd64
>Description:
When compiling lang/openjdk11 on a NetBSD-9.99.17/amd64 with lots of cores
and 24 parallel jobs, I see a build failure with:

#  Internal Error (semaphore_posix.cpp:45), pid=19650, tid=129521800276992
#  guarantee(ret == 0) failed: Failed to initialize semaphore; error='No space left on device' (errno=ENOSPC)

Reducing the parallel jobs to 4 makes it build.
(Other packages build fine with 24 jobs.)
>How-To-Repeat:
See above.
>Fix:
Not provided.

Either I'm running into a kernel limit (which one? how to increase it?)
or this might even be a kernel bug.

>Unformatted: