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ConnectionReset The connection was reset by the remote peer.
http://stackoverflow.com/questions/1434451/what-does-connection-reset-by-peer-mean
It‘s fatal. The remote server has sent you a RST packet, which indicates an immediate dropping of the connection, rather than the usual handshake. This bypasses the normal half-closed state transition
This can happen if the other side crashes and then comes back up,
This means that a TCP RST was received and the connection is now closed. This occurs when a packet is sent from your end of the connection but the other end does not recognize the connection;
it will send back a packet with the RST bit set in order to forcibly close the connection.
This can happen if the other side crashes and then comes back up, or if it calls close() on the socket while there is data from you in transit, and is an indication to you that some of the data that you previously sent may not have been received. It is up to you whether that is an error; if the information you were sending was only for the benefit of the remote client then it may not matter that any final data may have been lost. However you should close the socket and free up any other resources associated with the connection.
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原文地址：http://www.cnblogs.com/chucklu/p/4274192.html
