If a data grid is created with an appliance that is on a firmware level lower than V2.5, then that data grid will have a different configuration than a data grid that was created on an appliance at the V2.5 firmware level.
These two data grids are not compatible from in a multimaster replication (MMR) configuration. Even if the appliance is upgraded to V2.5 or later, the data grid retains the configuration that was defined when it was created at the lower level. This means that data grids that were created at the lower level cannot be linked to data grids that are created at the V2.5 firmware level.
When you link collectives, an error is reported that the two data grids cannot be linked, despite having the same name.
Diagnosing the problem
Determine if the two data grids were created using different firmware levels. One way to determine this is to download the objectgrid.xml file from each appliance and compare them. A data grid that was created using the V2.5 firmware contains additional map definitions that do not exist in data grids that were created using older firmware levels.
Resolving the problem
To resolve this problem so that you can link data grids in an MMR configuration, complete the following steps:
- Ensure all appliances are at the same firmware level (V2.5 in this case).
- Delete the data grid that was created on the old firmware, and then recreate it.
The new grid has the proper configuration and is compatible with the other V2.5 data grid definition.