Initially partition handling didn't support replicated caches, and this warning message wasn't removed when support for replicated caches was added with bug 1155606: 10:22:55,121 WARN (testng-ThreeNodesReplicatedSplitAndMergeTest:) [PartitionHandlingConfigurationBuilder] ISPN000303: Partition handling doesn't work for replicated caches, it will be ignored.