Cesar,
Check out these from http://forum.java.sun.com/thread.jspa?forumID=881&threadID=5101711
Looked around in JSC, and found the following properties to set, which solved my problem:
1. Node Resources (under Servers): set transaction-isolation-level to read-committed, connection-validation-method to auto-commit
2. SessionBean RowSets: set transactionIsolation to TRANSACTION_READ_COMMITTED
Actually connection validation and isolation level are related. See my theory here:
http://forum.sun.com/jive/thread.jspa?threadID=62629&start=25&tstart=0
Regards,
-Brad Mayer