After setting EclipseLink logging to FINEST, I did not find any exception from logs/server.log
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[#|2008-11-26T12:54:05.923+0900|FINEST|glassfish|org.eclipse.persistence.session.file:/D:/webtools/eclipse34/workspace/prelude/distributions/glassfish/target/glassfish/domains/domain1/eclipseApps/jpaWeb_forEclipse/WEB-INF/classes/-bookstore.query|_ThreadID=15;_ThreadName=Thread-4;ClassName=null;MethodName=null;|Execute query ReadObjectQuery(database.Book)|#]
[#|2008-11-26T12:54:05.924+0900|FINEST|glassfish|org.eclipse.persistence.session.file:/D:/webtools/eclipse34/workspace/prelude/distributions/glassfish/target/glassfish/domains/domain1/eclipseApps/jpaWeb_forEclipse/WEB-INF/classes/-bookstore.connection|_ThreadID=15;_ThreadName=Thread-4;ClassName=null;MethodName=null;|reconnecting to external connection pool|#]
[#|2008-11-26T12:54:05.925+0900|FINE|glassfish|org.eclipse.persistence.session.file:/D:/webtools/eclipse34/workspace/prelude/distributions/glassfish/target/glassfish/domains/domain1/eclipseApps/jpaWeb_forEclipse/WEB-INF/classes/-bookstore.sql|_ThreadID=15;_ThreadName=Thread-4;ClassName=null;MethodName=null;|SELECT BOOKID, INVENTORY, FIRSTNAME, SURNAME, PRICE, ONSALE, CALENDAR_YEAR, TITLE, DESCRIPTION FROM WEB_BOOKSTORE_BOOKS WHERE (BOOKID = ?)
bind => [207]|#]
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