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new 647f26b9b9 Add release notes for Apache RocketMQ 5.5.1 (#793)
647f26b9b9 is described below
commit 647f26b9b93420794e4313de91527197ee2a0e30
Author: lizhimins <[email protected]>
AuthorDate: Wed Aug 26 16:06:29 2026 +0800
Add release notes for Apache RocketMQ 5.5.1 (#793)
---
release-notes/2026-08-20-5.5.1.md | 163 ++++++++++++++++++++++++++++++++++++++
src/pages/download.md | 1 +
2 files changed, 164 insertions(+)
diff --git a/release-notes/2026-08-20-5.5.1.md
b/release-notes/2026-08-20-5.5.1.md
new file mode 100644
index 0000000000..04bce0349e
--- /dev/null
+++ b/release-notes/2026-08-20-5.5.1.md
@@ -0,0 +1,163 @@
+---
+title: "Release Notes - Apache RocketMQ - Version 5.5.1"
+categories:
+ - Release_Notes
+tags:
+ - Release_Notes
+ - RocketMQ
+ - Version
+---
+
+:::tip Download the 5.5.1 release
+- Source:
[rocketmq-all-5.5.1-source-release.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-source-release.zip)
[[PGP](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-source-release.zip.asc)]
[[SHA512](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-source-release.zip.sha512)]
+- Binary:
[rocketmq-all-5.5.1-bin-release.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-bin-release.zip)
[[PGP](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-bin-release.zip.asc)]
[[SHA512](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-bin-release.zip.sha512)]
+ :::
+<!--truncate-->
+
+Below is a summary of the issues addressed in the 5.5.1 release of RocketMQ.
For full documentation of the release, a guide to get started, please refer to
<a href='/docs/quickStart/01quickstart/'>Quick Start</a>.
+
+This maintenance release removes fastjson 1.x from the distribution (fastjson2
upgraded to 2.0.63 and DLedger bumped to 0.3.3.4), introduces a native RocksDB
CqCompactionFilter with a cross-platform JNI shim, deprecates the legacy Broker
DLedger mode, and delivers extensive stability and performance fixes across
tiered storage, Lite Mode, Proxy, and the store layer.
+
+## Security & Dependencies
+* [ISSUE #7703] Upgrade fastjson2 to 2.0.63 for security fixes by @lizhimins
in https://github.com/apache/rocketmq/pull/10715
+* [ISSUE #10651] bump DLedger to 0.3.3.4 (maintenance line) by @RongtongJin in
https://github.com/apache/rocketmq/pull/10958
+* [ISSUE #10641] Deprecate legacy Broker DLedger mode by @RongtongJin in
https://github.com/apache/rocketmq/pull/10642
+
+## New Feature (Native RocksDB Compaction Filter)
+Introduced a native ConsumeQueue compaction filter backed by a cross-platform
JNI shim, replacing the previous pure-Java filter and the shaded
rocketmq-rocksdb dependency with the official rocksdbjni artifact.
+* [ISSUE #10334] Support native CqCompactionFilter with cross-platform JNI
shim by @lizhimins in https://github.com/apache/rocketmq/pull/10335
+* [ISSUE #10334] Make native CqCompactionFilter shim self-contained without
rocksdbjni dependency by @lizhimins in
https://github.com/apache/rocketmq/pull/10371
+
+## What's Changed
+
+### Tiered Storage
+* [ISSUE #10462] Add memory backpressure to dispatch by @lizhimins in
https://github.com/apache/rocketmq/pull/10470
+* [ISSUE #10462] Fix concurrency bugs in tiered storage by @lizhimins in
https://github.com/apache/rocketmq/pull/10471
+* [ISSUE #10462] Optimize thread pool sizes for commit and fetch executors by
@lizhimins in https://github.com/apache/rocketmq/pull/10472
+* [ISSUE #10462] Improve error handling in tiered storage by @lizhimins in
https://github.com/apache/rocketmq/pull/10473
+* [ISSUE #10462] Standardize log format across tiered storage module by
@lizhimins in https://github.com/apache/rocketmq/pull/10474
+* [ISSUE #10462] Fix resource leaks and lifecycle issues in tiered storage by
@lizhimins in https://github.com/apache/rocketmq/pull/10476
+* [ISSUE #10572] Add dual TTL policy for tiered storage read-ahead cache by
@Houlong66 in https://github.com/apache/rocketmq/pull/10573
+
+### Lite Mode
+* [ISSUE #10253] Fix stale wildcardGroupMap entries caused by incorrect
parsing during LiteTopic wildcard unregistration by @Kris20030907 in
https://github.com/apache/rocketmq/pull/10254
+* [ISSUE #10345] fix: preserve lite topic for auto-renew receipt handles by
@Kris20030907 in https://github.com/apache/rocketmq/pull/10346
+* [ISSUE #10384] Enforce Lite exclusive subscription eviction via server-side
tombstones by @f1amingo in https://github.com/apache/rocketmq/pull/10386
+* [ISSUE #10387] Support runtime hot-reload of maxClientEventCount in
LiteEventDispatcher.ClientEventSet by @f1amingo in
https://github.com/apache/rocketmq/pull/10388
+* [ISSUE #10423] Optimize LiteConsumerLagCalculator.getLagCountTopK by
deferring getStoreTimestamp to topK results only by @f1amingo in
https://github.com/apache/rocketmq/pull/10424
+* [ISSUE #10450] Selective double-write in CombineConsumeQueueStore by @imzs
in https://github.com/apache/rocketmq/pull/10452
+* [ISSUE #10453] Fix unexpected decrement of lmq counter by @imzs in
https://github.com/apache/rocketmq/pull/10454
+* [ISSUE #10549] Fix lite topic reset offset: memory leak, FIFO block bypass,
and offset-0 reset failure by @f1amingo in
https://github.com/apache/rocketmq/pull/10550
+* [ISSUE #10560] Remove enableLiteEventMode config switch by @f1amingo in
https://github.com/apache/rocketmq/pull/10561
+* [ISSUE #10569] Support Lite Simple Consumer on server side by @f1amingo in
https://github.com/apache/rocketmq/pull/10570
+* [ISSUE #10615] Fix missing long-polling notification under
CombineConsumeQueue selective double-write by @imzs in
https://github.com/apache/rocketmq/pull/10616
+* [ISSUE #10622] Resolve ConsumerOffsetManager dynamically in
LiteEventDispatcher by @f1amingo in
https://github.com/apache/rocketmq/pull/10623
+* [ISSUE #10644] Add LMQ number gauge metric to Broker observability by
@f1amingo in https://github.com/apache/rocketmq/pull/10645
+* [ISSUE #10722] Lite Topic may not be cleaned up when message store timestamp
is unavailable by @f1amingo in https://github.com/apache/rocketmq/pull/10723
+
+### Store & RocksDB
+* [ISSUE #10344] Parameterize RocksDB CQ size amplification by @RongtongJin in
https://github.com/apache/rocketmq/pull/10344
+* [ISSUE #10270] Make Pop RocksDB BlockCache size configurable via
MessageStoreConfig by @lizhimins in
https://github.com/apache/rocketmq/pull/10271
+* [ISSUE #10421] Fix Timer message rocksdb use wrong cache key by @echooymxq
in https://github.com/apache/rocketmq/pull/10422
+* [ISSUE #10417] Fix stale minOffset after consumeQueue truncation by
@chenxu80 in https://github.com/apache/rocketmq/pull/10418
+* [ISSUE #10521] Use madvise(MADV_RANDOM) to disable kernel read-ahead during
correctMinOffset binary search by @lizhimins in
https://github.com/apache/rocketmq/pull/10523
+* [ISSUE #10639] Reuse a per-thread scratch buffer in
CommitLog.checkMessageAndReturnSize by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10640
+* [ISSUE #10813] Reduce temporary allocations in the LMQ append path by
@ai-yang in https://github.com/apache/rocketmq/pull/10814
+* [ISSUE #10819] Correct misleading CommitLog buffer comment by @fuyou001 in
https://github.com/apache/rocketmq/pull/10820
+* [ISSUE #10953] Clamp shifted message count range to queue bounds by
@qianye1001 in https://github.com/apache/rocketmq/pull/10954
+* [ISSUE #10959] Fix RocksDBConsumeQueue.iterateFrom should reject offset
below min offset by @ymwneu in https://github.com/apache/rocketmq/pull/10960
+* [ISSUE #9654] Optimize the bufferLocal size of the TimerMessageStore by
@ymwneu in https://github.com/apache/rocketmq/pull/9655
+* [ISSUE #10713] Optimize ConsumerFilterManager register CPU consumption by
@ymwneu in https://github.com/apache/rocketmq/pull/10714
+* [ISSUE #10515] Fix TransactionMetricsFlushService busy spin bug by
@wang-jiahua in https://github.com/apache/rocketmq/pull/10517
+* [ISSUE #10375] Fix race condition between deleteTopic and
FlushConsumeQueueService by removing getLifeCycle indirection by @f1amingo in
https://github.com/apache/rocketmq/pull/10376
+* [ISSUE #10543] resolve data race in ServiceThread wakeup mechanism by
@ShadowySpirits in https://github.com/apache/rocketmq/pull/10544
+
+### Broker & HA/Controller
+* [ISSUE #10578] Fix master election maxOffset comparator overflow by @Aias00
in https://github.com/apache/rocketmq/pull/10578
+* [ISSUE #10604] Fix TopicConfig DataVersion not persisted in split
registration by @imzs in https://github.com/apache/rocketmq/pull/10605
+* [ISSUE #10446] Support batch deletion of topics and subscription groups in
broker by @wang-jiahua in https://github.com/apache/rocketmq/pull/10448
+* [ISSUE #10435] Fix shared ClientChannelInfo preventing inactive channel
expiry by @chuanxo in https://github.com/apache/rocketmq/pull/10437
+* [ISSUE #10438] Fix buildTopicConfigSerializeWrapper exposing live
topicConfigTable reference by @chuanxo in
https://github.com/apache/rocketmq/pull/10439
+* [ISSUE #10284] Fix consumerOffset deserialization error and add test by
@ChineseTony in https://github.com/apache/rocketmq/pull/10287
+* [ISSUE #10457] Fix RocketmqColdCtr logger level by @brucelwl in
https://github.com/apache/rocketmq/pull/10447
+* [ISSUE-10546] Add default implementation for rejectRequest() in
NettyRequestProcessor by @f1amingo in
https://github.com/apache/rocketmq/pull/10547
+* fix(common): compare message queue ids safely by @yuluo-yx in
https://github.com/apache/rocketmq/pull/10884
+* fix(controller): compare partial broker identities safely by @yuluo-yx in
https://github.com/apache/rocketmq/pull/10886
+* fix(controller): detect inactive raft masters by @yuluo-yx in
https://github.com/apache/rocketmq/pull/10885
+* Improve ACL 2.0 authorization context handling by @dingshuangxi888 in
https://github.com/apache/rocketmq/pull/10925
+
+### Proxy & gRPC
+* [ISSUE #10260] Reject delayed transactional messages in gRPC send path by
@yx9o in https://github.com/apache/rocketmq/pull/10261
+* [ISSUE #10274] Fix ForwardMessageToDeadLetterQueue request mapping
descriptor by @Kris20030907 in https://github.com/apache/rocketmq/pull/10275
+* [ISSUE #10276] Fix PopConsumerService changeInvisibilityDuration losing CK
record when visibilityTimeout collision by @qianye1001 in
https://github.com/apache/rocketmq/pull/10277
+* [ISSUE #10280] Restore opaque when proxy remoting forward fails by @yx9o in
https://github.com/apache/rocketmq/pull/10281
+* [ISSUE #10297] Set brokerName for messages returned by proxy local POP path
by @yx9o in https://github.com/apache/rocketmq/pull/10298
+* [ISSUE #10285] Fix preserve popTime when rebuilding AckResult by @yx9o in
https://github.com/apache/rocketmq/pull/10286
+* [ISSUE #10510] Add gRPC server permit keepalive configuration by
@RockteMQ-AI in https://github.com/apache/rocketmq/pull/10516
+* [ISSUE #10661] Unregister all producer topics on gRPC client termination by
@yx9o in https://github.com/apache/rocketmq/pull/10662
+* [ISSUE #10827] fix(broker): spin for the lock on same-attemptId pop orderly
retry to avoid empty response by @lizhimins in
https://github.com/apache/rocketmq/pull/10828
+* [Fix #10460]: Pre-size ProxyContext map to avoid HashMap resize on request
path by @HarshMehta112 in https://github.com/apache/rocketmq/pull/10461
+
+### Client & Remoting
+* [ISSUE #10613] Fix async request-reply RequestCallback firing multiple times
by @wang-jiahua in https://github.com/apache/rocketmq/pull/10614
+* [ISSUE #10906] Prevent duplicate MQClientInstance creation by @qianye1001 in
https://github.com/apache/rocketmq/pull/10907
+* [ISSUE #10025] Treat blank local serve address as unset by @Aias00 in
https://github.com/apache/rocketmq/pull/10663
+* [ISSUE #10522] Reduce Remoting header encoding allocation via
FastCodesHeader/RocketMQSerializable optimizations by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10522
+* [ISSUE #8262] Fix bitsarray off by one by @SummCoder in
https://github.com/apache/rocketmq/pull/10506
+* fix: validate message batch input by @gaoxiaolei-s59 in
https://github.com/apache/rocketmq/pull/10459
+* [ISSUE #10247] Remove duplicate remove call in InvocationChannel by @yx9o in
https://github.com/apache/rocketmq/pull/10248
+
+### Index & Query
+* [ISSUE #10268] Fix incorrect time range file selection in
IndexStoreService.queryAsync by @lizhimins in
https://github.com/apache/rocketmq/pull/10269
+* [ISSUE #10291] fix queryMessage default index type by @yuz10 in
https://github.com/apache/rocketmq/pull/10292
+
+### Observability & Stability
+* [ISSUE #10266] Fix OOM caused by OpenTelemetry 1.44 OtlpGrpcMetricExporter
pool race by @Houlong66 in https://github.com/apache/rocketmq/pull/10267
+* [ISSUE #10398] Fix native memory leak on TLS certificate hot-reload by
@qianye1001 in https://github.com/apache/rocketmq/pull/10399
+* [ISSUE #10216] Fix potential NPE in EscapeBridge when topicPublishInfo is
null by @SGloria in https://github.com/apache/rocketmq/pull/10507
+* [ISSUE #10419] Fix NPE when class filter route data is missing by
@yin-bo-Final in https://github.com/apache/rocketmq/pull/10420
+* [ISSUE #10492] Add debug logging for swallowed exceptions in
StatsAllSubCommand by @SGloria in https://github.com/apache/rocketmq/pull/10493
+* [ISSUE #10441] Reduce per-RPC allocation in metrics by caching static
AttributeKey instances by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10443
+
+### Performance
+* [ISSUE #10467] Reduce per-message allocation in createUniqID and
valueOfMagicCode by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10469
+* [ISSUE #10400] Cache Version.values() in MQVersion to avoid repeated array
allocation by @qianye1001 in https://github.com/apache/rocketmq/pull/10401
+* [ISSUE #10511] Replace Enum.values() loop with static array lookup in
LanguageCode and SerializeType by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10513
+* [ISSUE #10486] Add getMessageType(Map) overload to eliminate redundant
properties decode by @wang-jiahua in
https://github.com/apache/rocketmq/pull/10487
+
+### Configuration & Extensibility
+* [ISSUE #10381] Make HashedWheelTimer parameters configurable in
QueueLevelConsumerOrderInfoLockManager by @f1amingo in
https://github.com/apache/rocketmq/pull/10382
+* [ISSUE #10425] Revert split registration dataVersion change by @RongtongJin
in https://github.com/apache/rocketmq/pull/10426
+* [ISSUE #10817] Upgrade SpotBugs for JDK 21 compatibility by @fuyou001 in
https://github.com/apache/rocketmq/pull/10818
+* Classify BrokerShutdownTest as a medium Bazel test by @fuyou001 in
https://github.com/apache/rocketmq/pull/10821
+
+### Testing & CI
+* [ISSUE #10341] Fix Bazel CI build failure caused by Maven Central rate
limiting by @lizhimins in https://github.com/apache/rocketmq/pull/10342
+* [ISSUE #10373] Quarantine flaky tests and add detection plan docs by
@lizhimins in https://github.com/apache/rocketmq/pull/10374
+* [ISSUE #10373] Fix quarantined flaky tests and remove CI rerun workflow by
@lizhimins in https://github.com/apache/rocketmq/pull/10379
+* [ISSUE #10383] Align Bazel dependencies with Maven pom.xml by @lizhimins in
https://github.com/apache/rocketmq/pull/10404
+* [ISSUE #10389] Fix or ignore several flaky tests of PopPriorityIT by @imzs
in https://github.com/apache/rocketmq/pull/10390
+* [ISSUE #10410] Fix RocksDBOptionsFactoryTest compile failure by @RongtongJin
in https://github.com/apache/rocketmq/pull/10411
+* [ISSUE #10430] Add unit tests for srvutil package by @lsq3497 in
https://github.com/apache/rocketmq/pull/10431
+* [ISSUE #10475] Add unit tests for CleanupPolicyUtils by @quzizii in
https://github.com/apache/rocketmq/pull/10475
+* [ISSUE #10562] Optimize PopConsumerServiceTest#transferToFsStoreTest to
avoid unnecessary background threads by @f1amingo in
https://github.com/apache/rocketmq/pull/10563
+* Fix flaky HATest semi-sync replication by @RongtongJin in
https://github.com/apache/rocketmq/pull/10495
+* Configure GitHub workflows to use concurrency cancel-in-progress by @apupier
in https://github.com/apache/rocketmq/pull/10445
+
+### Documentation
+* [ISSUE #10393] Fix outdated FAQ documentation URL in FAQUrl by @majialoong
in https://github.com/apache/rocketmq/pull/10394
+* [ISSUE #10593] Rename CLusterSendMsgRTCommand to ClusterSendMsgRTCommand by
@yx9o in https://github.com/apache/rocketmq/pull/10594
+* [DOCS] Update example dependency version from 4.3.0 to 5.5.0 by @H145608 in
https://github.com/apache/rocketmq/pull/10349
+* [DOCS] Update Chinese docs dependency version from 4.3.0/4.9.1 to 5.5.0 by
@H145608 in https://github.com/apache/rocketmq/pull/10358
+* [DOCS] Fix typo in Troubleshooting.md filename by @H145608 in
https://github.com/apache/rocketmq/pull/10360
+* [DOCS] Fix typos in documentation filenames by @quzizii in
https://github.com/apache/rocketmq/pull/10505
+* docs: fix broker IP typo in startup examples by @gaoxiaolei-s59 in
https://github.com/apache/rocketmq/pull/10440
+* docs: fix broker container reference and producer typos by @gaoxiaolei-s59
in https://github.com/apache/rocketmq/pull/10449
+* docs: fix inaccurate examples and typos across developer guides by @lsq3497
in https://github.com/apache/rocketmq/pull/10456
+* docs: remove dead Slack invite link from README by @fancy-agent in
https://github.com/apache/rocketmq/pull/10483
+* docs: fix dead link to tiered store config in tieredstore README by
@fancy-agent in https://github.com/apache/rocketmq/pull/10484
+* docs: format README for consistent Markdown style by @skant7 in
https://github.com/apache/rocketmq/pull/10551
+* Fix outdated constructor signatures in trace documentation by @SummCoder in
https://github.com/apache/rocketmq/pull/10501
+* Update ACL mqadmin commands in Chinese doc Section 7 by @SummCoder in
https://github.com/apache/rocketmq/pull/10504
+
+**Full Changelog**:
https://github.com/apache/rocketmq/compare/rocketmq-all-5.5.0...rocketmq-all-5.5.1
diff --git a/src/pages/download.md b/src/pages/download.md
index 1b33397bfd..a000f32459 100644
--- a/src/pages/download.md
+++ b/src/pages/download.md
@@ -7,6 +7,7 @@
## RocketMQ
| 版本 | 文档 |
发布日期 | Source 下载
| Binary 下载
| End of Support |
|----------------------|---------------------------------------------------|------------|----------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------|----------------|
+| **5.5.1** | [Release Notes](/release-notes/2026/08/20/5.5.1) |
2026.08.20 |
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-source-release.zip)
|
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.1/rocketmq-all-5.5.1-bin-release.zip)
| |
| **5.5.0** | [Release Notes](/release-notes/2026/04/10/5.5.0) |
2026.04.10 |
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.0/rocketmq-all-5.5.0-source-release.zip)
|
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.5.0/rocketmq-all-5.5.0-bin-release.zip)
| |
| **5.4.0** | [Release Notes](/release-notes/2025/12/24/5.4.0) |
2025.12.24 |
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.4.0/rocketmq-all-5.4.0-source-release.zip)
|
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.4.0/rocketmq-all-5.4.0-bin-release.zip)
| |
| **5.3.4** | [Release Notes](/release-notes/2025/11/26/5.3.4) |
2025.11.26 |
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.3.4/rocketmq-all-5.3.4-source-release.zip)
|
[download.zip](https://dist.apache.org/repos/dist/release/rocketmq/5.3.4/rocketmq-all-5.3.4-bin-release.zip)
| |
