libev fatal error: (libev) epoll_wait / Function not implemented

[Dan Cooper]

See here for all details: https://answers.launchpad.net/ubuntu/+source/ocserv/+question/700616
It does only occur on arm64 (Raspberry Pi), but not on amd64.

I don't think that this is a bug in ocserv, I assume it is in libev4.

I tried to set up a ocserv VPN server.
When I try to establish the connection, I get the following message, repeatedly.
The tunnel can't be established.
Feb 14 15:04:46 pi ocserv[363026]: main[proxyuser]:[2001:470xxxx]:50878 new user session
Feb 14 15:04:49 pi ocserv[363026]: main: pinged 10.0.0.140 and is not in use
Feb 14 15:04:49 pi ocserv[363026]: main[proxyuser]:[2001:470xxxx]:50878 user logged in
Feb 14 15:04:49 pi ocserv[363029]: worker[proxyuser]: 2001:470xxxx worker-vpn.c:2616: libev fatal error: (libev) epoll_wait / Function not implemented
Feb 14 15:04:49 pi ocserv[363026]: common/common.c:567: recvmsg: Connection reset by peer
Feb 14 15:04:49 pi ocserv[363027]: sec-mod: temporarily closing session for proxyuser (session: zeZGhd)
I'm using Ubuntu 21.10 on Raspberry Pi with ARM.

The packages that seems to be affected
admini@pi:~$ apt policy libev4
libev4:
  Installed: 1:4.33-1
  Candidate: 1:4.33-1
  Version table:
 *** 1:4.33-1 500
        500 ftp://ports.ubuntu.com/ubuntu-ports impish/universe arm64 Packages
        100 /var/lib/dpkg/status
admini@pi:~$

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

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