After this situation occurs, you don't receive any information from the SQL Server error log to further troubleshoot the problem.
bugs that are fixed in SQL Server 2012 Service Pack 3 .
About Service packs for SQL Server
Service packs are cumulative. Each new service pack contains all the fixes that are in previous service packs, together with any new fixes. Our recommendation is to apply the latest service pack and the latest cumulative update for that service pack. You do not have to install a previous service pack before you install the latest service pack. Use Table 1 in the following article for finding more information about the latest service pack and latest cumulative update.
How to determine the version, edition and update level of SQL Server and its components
Article ID: 3112362 - Last Review: Jul 11, 2016 - Revision: 1