JR52033: Provide option to disable caches for REST requests

APAR status

• Closed as new function.

Error description

• Unless the REST client includes the session management cookie
  (JSESSIONID) with each request, the WebSphere plug-in will
  assign each request to a different server in the cluster.
  
  If Cache Replication (DRS) is not enabled across servers,
  subsequent requests can land on servers with stale caches,
  leading to errors.
  

Local fix

Problem summary

• Provide option to disable caches for REST requests
  

Problem conclusion

• This fix is available for feature packs starting with Feature
  Pack 4, and requires fixpack 8 or higher in order to use the new
   ability described here.
  
  This fix provides the ability to disable cross transaction
  caching for specific data cache object caches while REST
  services are executing.
  
  To disable cross transaction caching while REST services are
  executing for the object caches with JNDI names
  services/cache/WCUserDistributedMapCache and
  services/cache/WCSessionDistributedMapCache, add the following
  settings to the CrossTransactionCache tag in the
  InstanceProperties tag in the wc-server.xml instance
  configuration file:
  
  <WCUserDistributedMapCache restCaching="false" />
  <WCSessionDistributedMapCache restCaching="false" />
  
  Starting in Feature Pack 7, to disable cross transaction caching
  while REST services are executing in the Search Server for the
  object cache with JNDI name
  services/cache/SearchUserDistributedMapCache, add the following
  configuration to the CrossTransactionCache configuration
  grouping in the
  Search.war/xml/config/com.ibm.commerce.foundation/wc-component-e
  xt.xml component configuration file:
  
  <_config:property
  name="CrossTransactionCache/SearchUserDistributedMapCache/restCa
  ching" value="false"/>
  
  For information about how to use wc-component-ext.xml files,
  refer to:
  
  http://www-01.ibm.com/support/knowledgecenter/SSZLC2_7.0.0/com.i
  bm.commerce.developer.doc/tasks/tsdwccomponent.htm
  

Temporary fix

Comments

APAR Information

• 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

  3C COM PROF ED

• Fixed component ID

  5724I4000

Applicable component levels

• R700 PSY

     UP