I getting the same error.
"Error: 14151, Severity: 18, State: 1."
" TCPIP socket error has occured (10054): An existing connection was forcibly closed by the remote host. SQLSTATE: 08S01, SQLCODE: 10054"
Replication has been setup between SQL Server 2005 and DB2 tables on Mainframe.
This happens every time when the data gets replicated between the publisher and the subscriber.
Prakash Bhojegowda MCSE, MCSA (SQL2012)