The database upgrade (to upgrade from H2 version 1.1.x) has been simplified. The setting NO_UPGRADE is no longer supported, instead use the database URL jdbc:h2v1_1:

Cluster: The SQL statement SET AUTOCOMMIT FALSE doesn't work. This limitation is now documented. Issue 259.

Password hash: in addition to connecting with the plain text password, H2 now supports connecting with the password hash.

  classes (v 1.2.128) connect to the database. The automatic upgrade .jar file must be present, and the url
  must contain NO_UPGRADE=TRUE

If baseDir is set, and a database name is given which points to a directory above (eg. "../dbname"), an exception is thrown.