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PK96517; 7.0.0.5: setting jvm custom property com.ibm.ws.cacheconfig.alwaystrigg

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Abstract

When a request object contains the <previewRequest> attribute invalidations are not always triggered.

Download Description

PK96517 resolves the following problem:

ERROR DESCRIPTION:
Moving the invalidation to the filter after the servlet is processed, there is a window where a http redirect happens and invalidations have not yet happened before the redirected request comes back to the server. So the redirected request can still use some stale data.

Following JVM custom property needs to be set:

com.ibm.ws.CacheConfig.alwaysTriggerCommandInvalidations=true

And PK91245 is a prerequisite for this iFix.

LOCAL FIX:
N/A

PROBLEM SUMMARY

USERS AFFECTED:
All users of IBM WebSphere Application Server using command caching and the <previewRequest> attribute in a servlet request object.

PROBLEM DESCRIPTION:
When a request object contains the <previewRequest> attribute invalidations are not always triggered.

RECOMMENDATION:
None

When a request object contains the <previewRequest> attribute dynacache sets the skipCache attribute to true. When the skipCache attribute is true invalidations are not always triggered.

PROBLEM CONCLUSION:
This APAR introduces JVM custom property com.ibm.ws.CacheConfig.alwaysTriggerCommandInvalidations. When this property is set to true command invalidations are triggered regardless of the skipCache attribute. The default value for this property is false. Setting this JVM custom property affects all cache instances.

To set a JVM custom property:
Click Servers > Application Servers > server > Java and Process Management > Process Definition > Java Virtual Machine > Custom Properties.

The fix for this APAR is currently targeted for inclusion in
fix pack 7.0.0.9. Please refer to the Recommended Updates
page for delivery information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Prerequisites

PK91245

Installation Instructions

Please review the readme.txt for detailed installation instructions.

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On
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Technical Support

Contact IBM Support using SR (http://www.ibm.com/software/support/probsub.html), visit the WebSphere Application Server Support Web site (http://www.ibm.com/software/webservers/appserv/was/support/), or contact 1-800-IBM-SERV (U.S. only).

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Document Information

Modified date:
07 December 2019

UID

swg24024536