Call suddenly hangs up

Calls suddenly hang up. I found these logs. Anyone knows why?

[Sep  6 16:11:52] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:52] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:53] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:56] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:56] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:56] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:57] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:59] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:11:59] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:00] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:00] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:00] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:09] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:09] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:09] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:09] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:20] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:29] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:29] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable
[Sep  6 16:12:29] ERROR[2999] tcptls.c: TCP/TLS unable to launch helper thread: Resource temporarily unavailable

You’ve run out of something. Could be memory, Could be number of processes. Could be file descriptors, altough I’m not sure that would present at this stage… You need to look at what you are consuming and what is excessive.