Seaquel
SQL Server error code

SQL Server error 9642

SQL Server raises error 9642 at severity 16, which marks a problem with the query or data that you can correct.

An error occurred in a Service Broker/Database Mirroring transport connection endpoint, Error: %i, State: %i. (Near endpoint role: %S_MSG, far endpoint address: '%.*hs')
Msg9642
Severity16
Group9000–9999

Source: Database Engine events and errors