Maximum parallel connections for ubuntu?
1 answer
You are probably making all tcp connections from one process and hitting the default limit on the number of open files for each process. You can confirm this limit with 'ulimit -a' or 'ulimit -n' on the command line. You can increase this limit with "ulimit -n" or setrlimit () as root, or by editing /etc/security/limits.conf.
Also see ...
Increasing the maximum number of tcp / ip connections in Linux
Is there a limit on the number of tcp / ip connections between machines on linux?
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