> ## Documentation Index
> Fetch the complete documentation index at: https://docs.streamnative.io/llms.txt
> Use this file to discover all available pages before exploring further.

# V4.2.5.6

# StreamNative Weekly Release Notes v4.2.5.6

## Download

### Distributions

* [https://github.com/streamnative/pulsar/releases/tag/v4.2.5.6](https://github.com/streamnative/pulsar/releases/tag/v4.2.5.6)

### Packages

* [Maven Central](https://search.maven.org/artifact/io.streamnative/pulsar/4.2.5.6/pom)

### Images

* [sn-platform](https://hub.docker.com/layers/streamnative/sn-platform/4.2.5.6/images/sha256-63fc862f2c1d60c36b6de010802c849210d93e3e5f3c88c34b82720f7cb322a3)

* [sn-platform-slim](https://hub.docker.com/layers/streamnative/sn-platform-slim/4.2.5.6/images/sha256-67b8ea6a84de1b01057d0cdef31642fe29161d465d9dd2ae20978d7b9ed9abdf)

* [private-cloud](https://hub.docker.com/layers/streamnative/private-cloud/4.2.5.6/images/sha256-67b8ea6a84de1b01057d0cdef31642fe29161d465d9dd2ae20978d7b9ed9abdf)

## General Changes

### Apache Pulsar

([#27406](https://github.com/apache/pulsar/pull/27406)) \[fix]\[broker] Release pending acks for fully acknowledged batches

([#27353](https://github.com/apache/pulsar/pull/27353)) \[fix]\[meta] Split ZooKeeper read batches rejected by the multiRead limits

([#27134](https://github.com/apache/pulsar/pull/27134)) \[fix]\[client] Keep retrying transient topic watcher creation failures

([#27225](https://github.com/apache/pulsar/pull/27225)) \[fix]\[broker] Fail topic policy reads after the service closes

([#27359](https://github.com/apache/pulsar/pull/27359)) \[fix]\[broker] PIP-442: Fix Netty IO threads blocking on the topic list memory limiter's wait time metrics

([#27224](https://github.com/apache/pulsar/pull/27224)) \[fix]\[txn] Retry participant lookup metadata failures

([#27221](https://github.com/apache/pulsar/pull/27221)) \[fix]\[txn] Retry failed transaction buffer snapshots on idle topics

([#27220](https://github.com/apache/pulsar/pull/27220)) \[fix]\[ml] Initialize read-only ledger frontiers before publication

([#27137](https://github.com/apache/pulsar/pull/27137)) \[fix]\[broker] Wait for topic cache removal before completing deletion

([#27136](https://github.com/apache/pulsar/pull/27136)) \[fix]\[broker] Serialize topic metadata deletion with in-flight loading

([#27158](https://github.com/apache/pulsar/pull/27158)) \[fix]\[broker] Retry applying received subscription updates

([#27032](https://github.com/apache/pulsar/pull/27032)) \[fix]\[broker] Ignore replicated subscription updates for the compaction subscription

([#27159](https://github.com/apache/pulsar/pull/27159)) \[fix]\[broker] Retry failed replicated subscription updates while idle

([#27143](https://github.com/apache/pulsar/pull/27143)) \[improve]\[broker] Avoid regex splitting in topic-list filtering

## Security Fixes


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