Using the MSSQL JDBC jar with JDK 1.6.0_29 breaks the connection from the Aserver and Eserver to the MSSQL database.
The Aserver and Eserver do not throw any exception, but do stop logging at the first attempt to connect to the Aserver/Eserver and never connect. For example:
Starting connection(s) to SQL:
mssql ... 15:30:41:506 [dal_conn] [main] - Attempting to open connection.
15:30:42:003 [dal_conn] [main] - Attempting to validate ...
15:30:42:003 [dal_conn] [main] - Executing query: SELECT COUNT(*) FROM WEB_SERVER_TYPE WHERE 1=2
No further connection logging appears after this.
If the Java Runtime Environment (JRE) is changed from the default version included with Access Manager 6.1 to a standalone version such as Sun Java 1.6.0_29 JDK during an upgrade from Access Manager 6.1 to 6.2, an incompatibility issue can be introduced in JDK 1.6.0_29 where it is not compatible with the MSSQL JDBC driver.