PK67471: UNABLE TO DISABLE CLASS PRELOADING THROUGH THE ADMINISTRATIVE CONSOLE

Fixes are available

APAR status

Closed as program error.

Error description

When trying to disable class preloading through the
administrative console:

Application Servers -> server_name -> Java and Process
Management -> Process Definition -> <Control|Adjunct|Servant> >
Java Virtual Machine > -Dibm.websphere.preload.classes=false for
Generic JVM arguments.

two entries are writen to the *.jvm.options file.  One set to
true and the other set to false.  Both are passed to java, but
the 'true' entry is passed last so the 'false' cannot be set.
The default setting for class preloading is true, and
-Dibm.websphere.preload.classes=true can be found in the
*.jvm.options files prior to making any changes through the
administrative console.

Local fix

Modify the node level variables.xml file, changing
-Dibm.websphere.preload.classes=true to
-Dibm.websphere.preload.classes=false.  The preload option is
found on the following line:

<entries xmi:id="VariableSubstitutionEntry_52"
symbolicName="WAS_SERVER_ONLY_default_jvm_options"
...
-Dibm.websphere.preload.classes=true
...
description="default jvm options"/>

Then save the file back on your HFS and run the command:

/<configRoot>/bin/wsc2n.sh -X

This will propogate the value to your native config files
(including the *.jvm.options files).

Restart the Application Server after the changes are made.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of WebSphere Application Server   *
*                  V6.0.1 for z/OS                             *
****************************************************************
* PROBLEM DESCRIPTION: Fail to disable class preloading        *
*                      through the administrative console      *
*                      using GenericJVMArgs                    *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Browse to the following link in the administrative console:

Application Servers -> server_name -> Java and Process
Management -> Process Definition -> <Control|Adjunct|Servant> >
Java Virtual Machine > -Dibm.websphere.preload.classes=false
for Generic JVM arguments. Save and Synch the settings.

Two entries are written to the *.jvm.options file. One set to
'true' and the other set to 'false'. Both are passed to java,
but the 'true' entry is getting passed last, so the intended
'false' value cannot be set. For V6.0.1 only, the default
setting for class preloading is true, and
-Dibm.websphere.preload.classes=true can be found under
node-level variables.xml file prior to making any changes.
Environment -> WebSphere Variables panel shows the default
options as WAS_SERVER_ONLY_default_jvm_options.

Problem conclusion

The code creating the *.jvm.options files was changed to
properly handle the GenericJVMArgs and only create one instance
of the property in the *.jvm.options file.

APAR PK67471 is currently targeted for inclusion in Service
Level (Fix Pack) 6.02.35 of WebSphere Application Server V6.0.1
for z/OS.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

Comments

APAR Information

APAR number
PK67471
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
601
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2008-06-11
Closed date
2009-02-04
Last modified date
2009-06-29

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

PK86979 PK90164

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R601 PSY UK46540
UP09/05/30 P F905

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0.1","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 December 2021

Tips

PK67471: UNABLE TO DISABLE CLASS PRELOADING THROUGH THE ADMINISTRATIVE CONSOLE

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R601 PSY UK46540

Fix is available

Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

Document Information

Share your feedback

Need support?