The reason for the too-many-open-files appears to be that
sockets are leaked when client connections fail due to SSL
errors.
The particular SSL error in my case seemed to be due to the
server certificate having expired. Barrier seems to automagically
create SSL certs that are valid for one
Package: barrier
Version: 2.1.2+dfsg-1~bpo9+1
Severity: normal
Dear Maintainer,
I have Barrier server version 2.1.2+dfsg-1~bpo9+1 on a Debian box
and Barrier client version 2.3.3 on a Mac (from Homebrew).
After restarting the Mac, Barrier failed to start. Its log says
repeatedly:
ERROR: ssl
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