C An established connection was aborted by the software in your host machine

Question

These errors are getting more and more frequent on my Game Server  They are causing the server to keep closing and restarting     System Net Sockets SocketException  0x80004005   An established connection was aborted by the software in your host machine     at System Net Sockets Socket BeginSend Byte   buffer  Int32 offset  Int32 size  SocketFlags socketFlags  AsyncCallback callback  Object state      at iRP Game Sessions Session SendData Byte   Data    This is the code from which these errors are generated   public void SendData byte   Data        try               if  mSocket    null                          Output WriteLine   SND  Socket has a null exception  which means it is now invalid  Remove this socket    OutputLevel CriticalError                     else                       mSocket BeginSend Data  0  Data Length  SocketFlags None  sendCallback  mSocket                       catch  Exception e                string WhatToWrite    Error handled  SESSION       e ToString       n n    e Message     n nStack      e StackTrace   Environment NewLine     n n           File AppendAllText Environment CurrentDirectory      data  fatal txt   WhatToWrite           Program Stop              The buffer sizes are correctly set  we are using KeepAlive on the socket and were using Send and Receive Timeouts   People suggested that disabling the firewall would help  but whenever I do this our Game Server  Dedicated Server  restarts itself as if it s under attack  so the firewall must remain enabled   Anyone else got any other solutions for this   PS  We are behind DDoS Mitigation Services which may be limiting the number of connections

User · Answer

This problem appear if two software use same port for connecting to the server
try to close the port by cmd according to your operating system
then reboot your Android studio or your Eclipse or your Software.

User · Answer

An established connection was aborted by the software in your host machine  That is a boiler-plate error message  it comes out of Windows   The underlying error code is WSAECONNABORTED   Which really doesn t mean more than  quot connection was aborted quot    You have to be a bit careful about the  quot your host machine quot  part of the phrase   In the vast majority of Windows application programs  it is indeed the host that the desktop app is connected to that aborted the connection   Usually a server somewhere else  The roles are reversed however when you implement your own server   Now you need to read the error message as  quot aborted by the application at the other end of the wire quot    Which is of course not uncommon when you implement a server  client programs that use your server are not unlikely to abort a connection for whatever reason   It can mean that a fire-wall or a proxy terminated the connection but that s not very likely since they typically would not allow the connection to be established in the first place  You don t really know why a connection was aborted unless you have insight what is going on at the other end of the wire   That s of course hard to come by   If your server is reachable through the Internet then don t discount the possibility that you are being probed by a port scanner   Or your customers  looking for a game cheat

[c#] C# An established connection was aborted by the software in your host machine

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