DB2 FOR LUW / DB2FORLUW / 950 - DB2

Connecting/attaching from a DB2 v9.5 Client and versions beyond 
on Unix, creates defunct db2ckpw processes. The defunct 
processes are created by the DB2 client libraries. This is an 
application side problem and only occurs when one sets 
authentication type to CLIENT. When the authentication occurs on 
the client side, DB2 will fork db2ckpw to authenticate the user. 
DB2 v9.5 and versions beyond do not install a signal handler for 
SIGCHLD and therefore DB2 will not call waitpid for a child 
process. However, applications such as DB2 Performance Expert 
and Command Line Processor (CLP)have a handler installed for 
SIGCHLD. This causes the db2ckpw process to become defunct. 
 
The problem can be reproduced using CLP. All that is needed is 
to change the DBM CFG authentication to CLIENT and use CLP to 
connect/attach. A defunct db2ckpw process will be created.

**************************************************************** 
* USERS AFFECTED:                                              * 
* All users using Client authentication                        * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* Connecting/attaching from a DB2 v9.5 Client and              * 
* versionsbeyond on Unix, creates defunct db2ckpw processes.   * 
* Thedefunct processes are created by the DB2 client           * 
* libraries.This is an application side problem and only       * 
* occurs when onesets authentication type to CLIENT. When the  * 
* authenticationoccurs on the client side, DB2 will fork       * 
* db2ckpw toauthenticate the user. DB2 v9.5 and versions       * 
* beyond do notinstall a signal handler for SIGCHLD and        * 
* therefore DB2 willnot call waitpid for a child process.      * 
* However, applicationssuch as DB2 Performance Expert and      * 
* Command Line Processor(CLP)have a handler installed for      * 
* SIGCHLD. This causes thedb2ckpw process to become defunct.   * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Change the DBM CFG authentication to SERVER                  * 
****************************************************************

Change the DBM CFG authentication to SERVER

DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
 

Fixed in DB2 v9.5 FP6.

keiner bekannt / siehe Local-Fix

Vorgänger  : APAR is sysrouted TO one or more of the following: IC64708 
Nachfolger : 

Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:

19.11.2009
31.05.2010
31.05.2010

9.5.FP6