What should I do if the swoole server cannot connect?

swooleWhat should I do if the server cannot connect?

Use a browser or TCP debugging tool to connect and have several diagnostic ideas:

php -m Check for swoole extension

View the default firewall status ( It displays not running after it is turned off, and running when it is turned on)

firewall-cmd --state Check whether the firewall is closed

ps -ajft

Check whether its own executable file is executing

yum install telnet

Use telnet for link testing telnet 127.0.0.1 9502

ctrl ]Exit the process

If there are no problems with the above

Go to the server to see if there is swoole_server("0.0" in the security group .0.0",9502);Specified port number

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