Application previously used POCO 1.4.7 without Data issues. Since upgrading to 1.7.0 seeing frequent "MySQL server has gone away" (errno 2006) errors, indicating that the server has closed a pooled session (using the SessionPool).
2016-03-10 10:56:34.494 [Error] UserService<73>: MySQL: [MySQL]: [Comment]: mysql_stmt_prepare error [mysql_stmt_error]: MySQL server has gone away [mysql_stmt_errno]: 2006 [mysql_stmt_sqlstate]: HY000 [statemnt]: SELECT name, value FROM reflector_userprop WHERE user = ?