Errors that occur when deleting document with many large attachments return a "200 OK" status code

The bug appears when deleting document with many large attachments: related to an XWiki limitation: http://jira.xwiki.org/browse/XWIKI-8910.
When deletion fails, xwiki responds with status OK (200), and mysql throws an error:

com.mysql.jdbc.PacketTooBigException: Packet for query is too large (MMM > NNN). You can change this value on the server by setting the max_allowed_packet variable.