"Thomas Markwalder via RT" <dhcp-confidential@isc.org> writes:

> Hello Pavel:
>
> We were able to reproduce it under Fedora 23.  Ubuntu and Centos 7
> seem to be immune.  We have an alternative patch that is under review
> and can forward it to you for testing once reviewed.
Reproduced with Centos 7
# rpm -q dhcp
dhcp-4.2.5-58.el7.centos.x86_64
# lsof | grep dhcpd | grep TCP | wc -l 
191
# omshell 
> server localhost
> port 7911
> connect
dhcpctl_connect: no more

Note: in case of virtual environment with virtio drivers and local to dhcpd
traffic the issue is not reproducible. 


>
> Our testing here with 4.3.3 under Fedora does confirm an eventual
> inability to make further OMAPI connections, but the server does
> continue to service DHCP clients.  The code limits the number of open
> FDs to 200.  As 4.2* is EOL, we did not test it, though same patch
> could be applied to it.
>
> Regards,
>
> Thomas Markwalder
> ISC Sofware Engineering