PK22995: EXCESSIVE CHILD PROCESS CREATION DURING STARTUP.

 Fixes are available

6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for i5/OS
PK65782; 2.0.47.1: IBM HTTP Server V2.0.47 Cumulative Interim Fix
6.0.2.25: WebSphere Application Server V6.0.2 Fix Pack 25 for AIX platforms
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for HP-UX platforms
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for OS/400 platform
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for Solaris
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for Windows platforms
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for AIX platforms
6.0.2.25: WebSphere Application Server V6.0.2 Fix Pack 25 for HP-UX platforms
6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for Solaris
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for HP-UX platforms
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for AIX platforms
6.0.2.29: WebSphere Application Server V6.0.2 Fix Pack 29 for AIX platforms
6.0.2.29: WebSphere Application Server V6.0.2 Fix Pack 29 for HP-UX platforms
6.0.2.29: WebSphere Application Server V6.0.2 Fix Pack 29 for Linux platforms
V6.0.2: Java SDK 1.4.2 SR11 Cumulative Fix for IBM WebSphere Application Server
6.0.2.29: WebSphere Application Server V6.0.2 Fix Pack 29 for Solaris
6.0.2.29: WebSphere Application Server V6.0.2 Fix Pack 29 for Windows platforms
6.0.2.27: WebSphere Application Server V6.0.2 Fix Pack 27 for Linux platforms
PK25355; 2.0.47.1: IBM HTTP Server V2.0.47 and V2.0.42 Cumulative Interim Fix
PK29827; 2.0.47.1: IBM HTTP Server V2.0.47 and V2.0.42 Cumulative Interim Fix
6.0.2.13: WebSphere Application Server V6.0.2 Fix Pack 13 for AIX platforms
6.0.2.13: WebSphere Application Server V6.0.2 Fix Pack 13 for HP-UX platforms
6.0.2.13: WebSphere Application Server V6.0.2 Fix Pack 13 for Windows platforms
6.0.2.13: WebSphere Application Server V6.0.2 Fix Pack 13 for Linux platforms
6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for Linux
6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for Windows
6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for AIX
6.1.0.2: WebSphere Application Server V6.1.0 Fix Pack 2 for HP-UX
6.0.2.15: WebSphere Application Server V6.0.2 Fix Pack 15 for OS/400
6.0.2.15: WebSphere Application Server V6.0.2 Fix Pack 15 for HP-UX
6.0.2.25: WebSphere Application Server V6.0.2 Fix Pack 25 for Linux platforms
6.0.2.25: WebSphere Application Server V6.0.2 Fix Pack 25 for Solaris
6.0.2.25: WebSphere Application Server V6.0.2 Fix Pack 25 for Windows platforms
6.0.2.15: WebSphere Application Server V6.0.2 Fix Pack 15 for AIX
6.0.2.15: WebSphere Application Server V6.0.2 Fix Pack 15 for Solaris
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for AIX platforms
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for OS/400 platform
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for Solaris
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for Windows platforms
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for HP-UX platforms
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for AIX platforms
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for HP-UX platforms
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for Windows platforms
6.0.2.13: WebSphere Application Server V6.0.2 Fix Pack 13 for Solaris platform
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for OS/400 platform
6.0.2.21: WebSphere Application Server V6.0.2 Fix Pack 21 for HP-UX platforms
6.0.2.21: WebSphere Application Server V6.0.2 Fix Pack 21 for Linux platforms
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for Windows platforms
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for Solaris
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for OS/400 platform
6.0.2.15: WebSphere Application Server V6.0.2 Fix Pack 15 for Windows
6.0.2.23: WebSphere Application Server V6.0.2 Fix Pack 23 for Linux platforms
6.0.2.21: WebSphere Application Server V6.0.2 Fix Pack 21 for AIX platforms
6.0.2.21: WebSphere Application Server V6.0.2 Fix Pack 21 for Windows platforms
6.0.2.21: WebSphere Application Server V6.0.2 Fix Pack 21 for Solaris platforms
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for Solaris
6.0.2.17: WebSphere Application Server V6.0.2 Fix Pack 17 for Linux platforms
6.0.2.19: WebSphere Application Server V6.0.2 Fix Pack 19 for Linux platforms
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for AIX platforms
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for HP-UX platforms
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for OS/400 platform
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for Linux platforms
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for Solaris
6.0.2.31: WebSphere Application Server V6.0.2 Fix Pack 31 for Windows platforms
V6.0.2: Java SDK 1.4.2 SR11 Cumulative Fix for IBM WebSphere Application Server



APAR status
Closed as program error.

Error description
Excessive child process creation can occur when child processes
initialize slowly.  The parent process does not consider the
initializing processes as active, leading to another child
process
being created.  Typical messages in error log:
1. [info] server seems busy, (you may need to increase Start...
  When this is seen, there is usually a high CPU condition as
  many child processes are created.
  The typical trigger is a plug-in module performing
  initialization in the new child process and taking an
  unexpected amount of time.

2. [error] server reached MaxClients setting, consider raising
   the..
   When written at startup there is usually no other problem
   symptom than the presence of this message when there is no
   load on the server.  This can occur infrequently in normal
   circumstances.
Local fix Problem summary
The IHS parent process checks the number of
idle threads to determine if more child processes need to be
created in order to comply with the values of the
MinSpareThreads and MaxSpareThreads directive.
In the rare situation reported by this PMR, there were no idle
threads at the time the parent process made the check.  Even
though child processes had already been created, they were
not sufficiently initialized to be counted as idle, so the
parent process continued to create more child processes.
Problem conclusion
The parent process must count child
processes currently initializing as idle in order to avoid
the problem with excessive child process creation problem.
When they aren't considered idle, two many child processes
will be created and some will be terminated once they
initialize and the parent discovers that too many idle threads
are present (i.e., MaxSpareThreads is exceeded).
This fix will be provided in
2.0: 
PK25355 or later
6.0: 6.0.2.13 or later
6.1: 6.1.0.1 or later
Temporary fix Comments
APAR information
APAR number PK22995
Reported component name WAS HTTP SERVER
Reported component ID 5630A3603
Reported release 00A
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2006-04-07
Closed date 2006-06-05
Last modified date 2006-06-05

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
HTTPD          

Publications Referenced

Fix information
Fixed component name WAS HTTP SERVER
Fixed component ID 5630A3603

Applicable component levels
R00A PSN    UP
R00H PSN    UP
R003 PSN    UP
R00I PSN    UP
R00S PSN    UP
R00P PSN    UP
R10A PSN    UP
R10H PSN    UP
R103 PSN    UP
R10I PSN    UP
R10S PSN    UP
R10P PSN    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > IBM HTTP Server > Runtime
Operating system(s):
Software version: 00A
Software edition:
Reference #: PK22995
IBM Group: Software Group
Modified date: Jun 5, 2006