PQ76632: THE DEFAULT ISOLATION LEVEL FOR SERVLETS CONNECTING TO DB2 TRANSACTION_REPEATABLE_READ NEEDS TO BE CLARIFIED. | |||||||||||||||||||||||||
![]() |
|||||||||||||||||||||||||
APAR status Closed as documentation error. Error description In Assembling J2EE Applications Isolating transactions that access persistent data lists the default descriptor value of TRANSACTION_NONE which results in the JDBC isolation level of TRANSACTION_REPEATABLE_READ for session and bmp entity beans. Since servlets do not have a descriptor value for isolation level the documentation needs to be clarified to indicate that servlets that connect to db2 will also get a default JDBC isolation level of TRANSACTION_REPEATABLE_READ.Local fix Problem summary **************************************************************** * USERS AFFECTED: All users of WebSphere Application Server * * version 4.0.1 for z/OS and OS/390 * **************************************************************** * RECOMMENDATION: * **************************************************************** The default isolation level for servlets connecting to DB2 TRANSACTION_REPEATABLE_READ needs to be clarified.Problem conclusion The note following the isolation level default value in Chapter 4, section "Isolating transactions that access persistent data" of "WebSphere Application Server V4.0.1 for z/OS and OS/390: Assembling J2EE Applications",SA22-7836-06, will be changed to the following: Notes: 1. For beans assembled and deployed with the default descriptor value TRANSACTION_NONE, WebSphere for z/OS actually uses the JDBC isolation level TRANSACTION_REPEATABLE_READ on connections that the EJB container acquires and uses to manage CMP persistent state in DB2. 2. Servlets do not have a descriptor value for isolation levels. Therefore, servlets that connect to DB2 will also get a default JDBC isolation level of TRANSACTION_REPEATABLE_READ. NOTE: Periodically, we refresh the documentation on our Web site so these changes might have been made before you read this text. To access the latest on-line documentation, go to the product library page at URL: www.ibm.com/software/webservers/appserv/zos_os390/libraryTemporary fix Comments
APAR is sysrouted FROM one or more of the following: APAR is sysrouted TO one or more of the following: Modules/Macros
|
Document Information |
Product categories: Software > Application Servers >
Distributed Application & Web Servers > WebSphere Application
Server for z/OS
Operating system(s):
Software version: 401
Software edition:
Reference #: PQ76632
IBM Group: Software Group
Modified date: Sep 2, 2003
(C) Copyright IBM Corporation 2000, 2006. All Rights Reserved.