Puma error: Rack app ("POST /api/graphql" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable> , Error reached top of thread-pool: stack level too deep (SystemStackError)

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2025-10-11 09:33:36 +0000 Rack app ("POST /api/graphql" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable>
2025-10-11 09:33:36 +0000 Rack app ("POST /api/graphql" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable>
Error reached top of thread-pool: stack level too deep (SystemStackError)
Error reached top of thread-pool: stack level too deep (SystemStackError)
2025-10-11 09:33:36 +0000 Rack app ("GET /api/v4/projects/2/repository/tagssearch=&per_page=20" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable>
2025-10-11 09:33:36 +0000 Rack app ("GET /api/v4/projects/2/repository/branchessearch=&per_page=20&sort=updated_desc" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable>
Error reached top of thread-pool: stack level too deep (SystemStackError)
Error reached top of thread-pool: stack level too deep (SystemStackError)
2025-10-11 09:33:36 +0000 Rack app ("GET /-/manifest.json" - (127.0.0.1, 127.0.0.1)): #<ThreadError: can't create Thread: Resource temporarily unavailable>
Error reached top of thread-pool: stack level too deep (SystemStackError)

ulimit -a:

real-time non-blocking time  (microseconds, -R) unlimited
core file size              (blocks, -c) 0
data seg size               (kbytes, -d) unlimited
scheduling priority                 (-e) 0
file size                   (blocks, -f) unlimited
pending signals                     (-i) 4124540
max locked memory           (kbytes, -l) 132019848
max memory size             (kbytes, -m) unlimited
open files                          (-n) 1024
pipe size                (512 bytes, -p) 8
POSIX message queues         (bytes, -q) 819200
real-time priority                  (-r) 0
stack size                  (kbytes, -s) 8192
cpu time                   (seconds, -t) unlimited
max user processes                  (-u) 4124540
virtual memory              (kbytes, -v) unlimited
file locks                          (-x) unlimited