5.5.0 Release Notes

Vector collection data structure

Multi-member routing for Java clients

Jet job placement control

Long-term Support (LTS) releases

Feast feature store integration

Dynamic configuration using REST API

For Community Edition users only - CP Subsystem is now an Enterprise Edition only feature

Thread-per-core (TPC) requires ALL_MEMBERS cluster routing (previously known as smart routing) to function on clients

There is currently a known issue that has potential for causing a memory leak in Vector collections in some scenarios. For more info, including a workaround, see Vector Collection Known Issue.

Replace smart-routing with cluster-routing options

Update cluster routing mode compatibility for TPC

Introduce queue cap props for persistence

Allow EE member to join OS cluster

Client connectivity logging

Add needsFsync to Clear task

Shade vector JAR in main enterprise JAR

Manual index cleanup operation

Re-introduce RU code for 5.2 → 5.5 upgrade

Configuration for number of neighbours fetched from partitions

Fail-fast if specify CP config in a Community version

Allow 5.5 member join clusters with version 5.0-5.4

Add JobBuilder to JetService

Introduce a common parent POM for hazelcast and hazelcast-enterprise

Improve float array serialization performance

Add CP direct-to-leader operation sending for ADVANCED_CP licensed clients

Add ZGC bean names to support GC stats #26329

Delete Jet job resources immediately after job finishes

Fix completed op count metric in OperationThread

Fix incorrect results of parallel SQL queries with reusable processor meta-suppliers

Restore previous ExecutionService graceful shutdown timeout value

Improve float array serialization performance in client protocol

Explicitly release netty release counted netty ssl engine

Exclude non-WAN address aliases during WAN MemberHandshake

JobConfig#add() not using derived id for some resources

GCS connection issue workaround

Correct UserCodeNamespaceService#reset behaviour

Prevent SystemPropertiesConfigParser throwing ClassCastException on startup with non-String properties

Don’t use the default password from the SymmetricEncryptionConfig

Make AddIndexBackupOperation allowed in passive state

Execute PostJoin operations if member hot restart start is forced

Fix partition migrating lock during concurrent migration and replication

Fix known CP issue that caused OOMs due to leadership races

Fix partitions initial offsets in Kafka connector #25769

IMap.delete operations don’t update the LocalMapStats #26212

Updated StringUtil::trim() to consider all type of white space #25804

The smart-routing client configuration option has been deprecated in favor of the new cluster-routing options

Robert Höglund

Ricky Memphis

Andrzej Nestoruk

Gaurav Salunke