Connect to server failed when get session:error: 在一个非套接字上尝试了一个操作 about mina-sshd HOT 4 OPEN

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The error message appears to indicate that this is Windows error 10038 ("An operation was attempted on something that is not a socket."). Searching the Internet for "OS 10038" or related things (like the Chinese error message text!) gets quite a few hits. Some include the Apache HTTP server; compare the mod_winnt configuration of Apache httpd 2.2. (In newer releases, that config was removed; compare the httpd 2.4 documentation: it appears the problem is still there, but httpd falls back to another API if there are too many failures.)

The cause appears to be unclear. Most hits report this occurring suddenly from time to time in otherwise working applications. It's being mentioned for many different applications. Some mention it was some corruption in the Windows TCP/IP stack, and some people claim running "netsh winsock reset" would resolve this problem.

It is possible that the AsynchronousSocketChannel used by the Apache MINA sshd NIO2 transport back-end exercises some Windows code that triggers a bug in Windows. The Java native code does use the Windows ConnectEx function... maybe that can have the same problem as AcceptEx mentioned on other sites. JSch definitely doesn't use AsynchronousSocketChannel.

You could try using the sshd-mina or sshd-netty transport back-ends with Apache MINA sshd; those also do not use AsynchronousSocketChannel.

from mina-sshd.

You could also try using a later Java version. Try Java 11 or 17, or maybe even 19.

from mina-sshd.

We can't go to the customer site to check, so we'll contact the customer to try "netsh winsock reset"。

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