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Error Cannot assign requested address

I wrote a program for 100000 consecutive visits to redis, but there was a problem with Cannot assign requested address. At first, I thought it was the problem of redis (I may not be able to bear so many visits), but google found that it turned out to be:

The client connects to the server frequently, because each connection ends in a very short time, resulting in a lot of TIME_WAIT, so that the available port number is used up, so the new connection cannot bind the port, that is, "Cannot assign requested address".

It's the client side problem, not the server side problem. Through netstat, you do see a lot of connections in the TIME_WAIT state.

Found a solution on the Internet:

Execute the command to modify the following 2 kernel parameters:

Sysctl-w net.ipv4.tcp_timestamps=1 enables support for TCP timestamps. If this is set to 0, one of the following settings will not work

Sysctl-w net.ipv4.tcp_tw_recycle=1 means to enable the fast recovery of TIME-WAIT sockets in TCP connection

Modify it, solve it!

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