Unable to perform operations on sockets due to insufficient system buffer space or queue full-solution
Exception message:
System.Net.Sockets.SocketException (0x80004005): cannot perform an operation on a socket due to insufficient system buffer space or a full queue. 192.168.0.187:22
At System.Net.Sockets.Socket.DoConnect (EndPoint endPointSnapshot, SocketAddress socketAddress)
At System.Net.Sockets.Socket.Connect (EndPoint remoteEP)
At Tamir.SharpSsh.java.net.Socket..ctor (String host, Int32 port)
At Tamir.SharpSsh.jsch.Util.createSocket (String host, Int32 port, Int32 timeout)
Error description:
WebService and processing services are deployed on the server: WebService has client polling calls; processing services also poll the database
Upload the file to SFTP after relevant processing.
Solution:
Check that the operation on the socket cannot be performed due to insufficient system buffer space or queue full
Use NETSTAT-ano > C:\ NET.TXT
Found at the end of the file C:\ NET.TXT
TCP 192.168.1.122:65529 192.168.1.124:53343 FIN_WAIT_2 22668
TCP 192.168.1.122:65530 192.168.1.124:53017 FIN_WAIT_2 14508
TCP 192.168.1.122:65531 192.168.1.124:64365 FIN_WAIT_2 23160
TCP 192.168.1.122:65532 192.168.1.124:58246 FIN_WAIT_2 23064
Verify that the socket ports on the server have been allocated.
Modify two registries:
HKEY_LOCAL_MACHINE\ System\ CurrentControlSet\ Services\ Tcpip\ Parameters\ MaxUserPort if not, manually create DWord (32-bit) "numeric data" to decimal 65534 or as appropriate.
This value represents the maximum number of ports used by the user, and the default is 5000.
HKEY_LOCAL_MACHINE\ System\ CurrentControlSet\ Services\ Tcpip\ Parameters\ TCPTimedWaitDelay if not, manually create DWord (32-bit) "numeric data" to decimal 30 or whatever you think is appropriate.
This value indicates how long a closed port can wait before it can be reused. The default is 120 seconds, that is, 2 minutes before it can be reused.
Refer to the explanation of Microsoft parameters: https://technet.microsoft.com/en-us/library/cc938196.aspx
DOS cmd command "netstat-n" to view the TCP connection
