899139bc_for_Tracing_in_SQL_Server_2014__Description
[Package name] sqlserver [Event name] file_handle_in_use [Description] 
Fired when a file handle we're trying to delete is in use and we don't expect it to be. The typical response is dumping all the handles in the system via SysInternals HANDLE.EXE
New Extended Events for Tracing in SQL Server 2014
Description