High concurrency causes dns.resolver.NoResolverConfiguration: cannot open /etc/resolv.conf + progress bar stuck at 100% #167
Description
When running knockpy against a domain, the scan appears to complete (progress bar reaches 100%), but the process never exits and nothing further happens.
If I interrupt the process with Ctrl + C, I consistently see multiple exceptions related to DNS resolution, ending with:
dns.resolver.NoResolverConfiguration: cannot open /etc/resolv.conf OSError: [Errno 24] Too many open files: '/etc/resolv.conf'
It seems the tool is exhausting file descriptors, likely due to repeated instantiation of dns.resolver.Resolver() under high concurrency.