PM97575: PROVIDE RESOURCE FILTERING IN PROTECTION CLASS LOADING

Fixes are available

APAR status

Closed as program error.

Error description

PM29185 covers the "loadClass" calls,  but SLF4J code also
performs "getResources" which are not blocked, causing further
error messages:
"SystemErr     R SLF4J: Class path contains multiple SLF4J
bindings."

Local fix

Error messages can be ignored,  as they won't impede
functionality at runtime.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server packaging the SLF4J logging          *
*                  framework in their applications             *
****************************************************************
* PROBLEM DESCRIPTION: Warning messages are emitted by the     *
*                      SLf4J framework for classes             *
*                      inaccessible to the application         *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
The SLF4J logging framework contains a mechanism to check for
duplicate versions of itself, utilizing a getResources call
against one of its classes.  WebSphere Application Server
packages SLF4J, providing a filtering mechanism to prevent
applications from accessing it via loadClass calls, but it
does not prevent the getResources call made in this check.
This can result in a warning message being emitted by SLF4J
even in instances in which the application correctly packages
it.

Problem conclusion

Logic was added to filter the SLF4J getResources calls,
similar to the paradigm used for loadClass calls.  Note that
if there are multiple non-WAS SLF4J versions packaged in
application-visible class loaders, the message will still be
emitted.

The fix for this APAR is currently targeted for inclusion in
fix packs 8.0.0.9 and 8.5.5.3.  Please refer to the
Recommended Updates page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PM97575
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-09-21
Closed date
2014-02-07
Last modified date
2014-02-07

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
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R800 PSY
UP
R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
28 April 2022

Tips

PM97575: PROVIDE RESOURCE FILTERING IN PROTECTION CLASS LOADING

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

R800 PSY

R850 PSY

Document Information

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