Adobe has published a technote on additional configuration that is required to ensure that installations of the LiveCycle ES Update 1 (8.2.1) JBoss Turnkey run stable over a long term. This only applies to JBoss Turnkey installations. The changes include:
1) replacing the 3.x version of the MySQL JDBC driver with a 5.0.x version
2) removing some of the JVM init arguments
These changes are HIGHLY recommended. These need to be made even if you have applied the recently released service pack (SP1).