Error 1

SQL Error: ORA-44424: BINARY XML storage requires XML Schema registered for BINARY usage

Resolved by registering a schema for binary usage.

Error 2

SQLException: ORA-00600: internal error code, arguments: [17114], [0xD2FCF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17112], [0xD2FCF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17147], [0xD2FCF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17147], [0xD2FCF64], [], [], [], [], [], []

During querying large volume of documents (8931 documents).

Unsolved.

Error 3

Table storage type XMLType Object Relational. Full table summation (8931 documents).

SQL Error: ORA-00600: internal error code, arguments: [kghfrempty:ds], [0xBF30004], [], [], [], [], [], []
ORA-00039: error during periodic action
ORA-00600: internal error code, arguments: [kghfrempty:ds], [0xBF30004], [], [], [], [], [], []
00600. 00000 -  "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause:    This is the generic internal error number for Oracle program
	exceptions.	This indicates that a process has encountered an
	exceptional condition.
*Action:   Report as a bug - the first argument is the internal error number

followed by:

SQL Error: Closed Connection

and, after reconnect:

SQL Error: ORA-00600: internal error code, arguments: [17114], [0xD1ACF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17112], [0xD1ACF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17147], [0xD1ACF64], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [17147], [0xD1ACF64], [], [], [], [], [], []
00600. 00000 -  "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause:    This is the generic internal error number for Oracle program
	exceptions.	This indicates that a process has encountered an
	exceptional condition.
*Action:   Report as a bug - the first argument is the internal error number

Unsolved.