Enhancements:

• A new configuration option defaultSqlProviderType is added. The specified class will be used as the SQL provider when the value() or type() is not specified in @SelectProvider, @UpdateProvider, @InsertProvider and @DeleteProvider. #1951
• A new transaction isolation level SQL_SERVER_SNAPSHOT is added to TransactionIsolationLevel enum to support the MS SQL Server specific isolation level SNAPSHOT. #1973
• When there is no JEP-290 serialization filter defined, a WARN level message is logged on deserializing object streams. #2079

Bug fixes:

• Possible NoSuchPropertyException under heavy load. #1648
• Possible InvalidPathException when registering type aliases by specifying package name. #1974
• Possible OutOfMemoryError when using BlockingCache. #2044

There is no known backward incompatible change since 3.5.5.

Please see the 3.5.6 milestone page for the complete list of changes.