Merge policy and UCN (#1456)

Added support for merge policies UCN for all core data structures and vector collection. Jira: https://hazelcast.atlassian.net/browse/CORE-186 https://hazelcast.atlassian.net/browse/AI-206 PR: hazelcast/hazelcast-mono#3721 hazelcast/hazelcast-mono#3616 --------- Co-authored-by: James Holgate <[email protected]> Co-authored-by: Rob Swain <[email protected]>
hazelcast · Jan 16, 2025 · afcf4e6 · afcf4e6
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diff --git a/docs/modules/clusters/pages/user-code-namespaces.adoc b/docs/modules/clusters/pages/user-code-namespaces.adoc
@@ -11,6 +11,7 @@ Your resources can be run on a Hazelcast cluster to support your business logic.
 
 * MapStore
 * Split brain events
+* Custom merge policies
 * `ExecutorService` runnable
 * Jet jobs
 

diff --git a/docs/modules/network-partitioning/pages/split-brain-recovery.adoc b/docs/modules/network-partitioning/pages/split-brain-recovery.adoc
@@ -254,6 +254,9 @@ public interface SplitBrainMergePolicy<V, T extends MergingValue<V>, R>
 NOTE: Please have in mind that `existingValue` can be `null`.
 This happens when a data structure or key-based entry was just created in the smaller cluster.
 
+NOTE: Custom merge policy classes must be present on the classpath of all member nodes. This can be achieved
+by updating the classpath for each node manually, or by using the {ucn} feature. See xref:clusters:user-code-namespaces.adoc[User Code Namespaces] for more information.
+
 === Merge Types
 
 A merge type defines an attribute which is required by a merge policy and provided by a data structure.