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IBM WebSphere eXtreme Scale Version 6.1 Fix Pack 4 (6.1.0.4), including the ObjectGrid component, provides several fixes. Version 6.1.0.4 supersedes ObjectGrid Version 6.1.0.3.

Download Information

Download the fix from the IBM support site. See WebSphere Extended Deployment V6.1.0 Fix Pack 4 for more information.

Features and enhancements

• Query performance enhancements
  ObjectGrid query has been enhanced to more efficiently utilize indexes, reduce memory usage during processing, and process results more quickly when using the getResultIterator methods. The Query.setHint() and ObjectQuery.setHint() methods have also been added to allow choosing a single index when using queries with AND operations.

• SessionHandle pre-bind support
  SessionHandles can now be created prior to calling any ObjectMap operations, allowing customers to select a partition (when using per-container partition placement). The new SessionHandleTransformer class has also been created to allow efficient serialization of SessionHandleobjects when storing them in HTTP sessions or cookies.

Bug fixes

• Property access entities cannot be serialized — Managed or detached entities configured as property-access cannot be serialized.

• Prevent containers from starting successfully when plug-in and entity classes cannot be loaded.
• ObjectGrid map and transaction statistics are incorrectly inflated when using queries and non-transactional APIs.
• Fix the MapMBean.getMapCountStatistic() statistic MBean operation to return results without enabling statistics.

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