Hypersonic is Not Supported
The Hypersonic database is included for testing purposes only and is not supported.
Known issues with the Hypersonic Database include:
No transaction isolation thread and socket leaks (connection.close() does not tidy up resources)
Persistence quality (logs commonly become corrupted after a failure, preventing automatic recovery)
database corruption stability under load (database processes cease when dealing with too much data)
Not viable in clustered environments
Related Concepts:
Oracle
MySQL
[MISSING TOPIC 359] Data Sources