APAR status
Closed as program error.
Error description
Attempting to start a WebSphere eXtreme Scale dynamic cache with a near cache currently requires the nearCacheLastAccessTTLSyncEnabled property set on the backingMap. This should only be optional and should not result in the following warning: CWOBJ0006W: An exception occurred: com.ibm.websphere.objectgrid.ObjectGridRuntimeException: Dynamic cache near cache must have the nearCacheLastAccessTTLSyncEnabled backing map property set to true
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of Websphere eXtreme Scale * * Version 8.6 or WebSphere XC10 DataPower * * Appliance Version 2.5 using Dynamic Cache * * with a near cache. * **************************************************************** * PROBLEM DESCRIPTION: In eXtreme Scale 8.6 the * * backingMap * * nearCacheLastAccessTTLSyncEnabled * * should not be a required * * property. * **************************************************************** * RECOMMENDATION: * **************************************************************** The nearCacheLastAccessTTLSyncEnabled feature will "touch" a remote cache entry whenever a "get" is performed on a corresponding near cache entry. This is important if "Last Access" or "Least Recently Used" eviction is being performed on the remote dynamic cache data grid. However, some users may be controlling their remote data grid size via invalidations (instead of Last Access or TTL eviction) and will want to avoid the overhead of the nearCacheLastAccessTTLSync processing.
Problem conclusion
For WebSphere eXtreme Scale, the nearCacheLastAccessTTLSyncEnabled property is now optional in the backingMap section of the Objectgrid.xml file. For the XC10 appliance, the custom property "com.ibm.websphere.xs.dynacache.disableNearCacheLastAccessTTLSyn c" can be set on the WAS dynamic cache instance, and this disables the LastAccessTTLSync function on the XC10.
Temporary fix
Comments
APAR Information
APAR number
PM97238
Reported component name
WS EXTREME SCAL
Reported component ID
5724X6702
Reported release
860
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-09-17
Closed date
2013-09-17
Last modified date
2013-09-17
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
WS EXTREME SCAL
Fixed component ID
5724X6702
Applicable component levels
R860 PSY
UP
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Document Information
Modified date:
17 September 2013