Release 2.42.21. Updated CHANGELOG.md, README.md and all pom.xml.

Author: AWS

.changes/2.42.21.json

@@ -0,0 +1,54 @@
+{
+    "version": "2.42.21",
+    "date": "2026-03-25",
+    "entries": [
+        {
+            "type": "bugfix",
+            "category": "AWS SDK for Java v2",
+            "contributor": "",
+            "description": "Fix bug in CachedSupplier that retries aggressively after many consecutive failures"
+        },
+        {
+            "type": "feature",
+            "category": "AWS Batch",
+            "contributor": "",
+            "description": "Documentation-only update for AWS Batch."
+        },
+        {
+            "type": "feature",
+            "category": "AWS Marketplace Agreement Service",
+            "contributor": "",
+            "description": "The Variable Payments APIs enable AWS Marketplace Sellers to perform manage their payment requests (send, get, list, cancel)."
+        },
+        {
+            "type": "feature",
+            "category": "AWS User Experience Customization",
+            "contributor": "",
+            "description": "GA release of AccountCustomizations, used to manage account color, visible services, and visible regions settings in the AWS Management Console."
+        },
+        {
+            "type": "feature",
+            "category": "AmazonApiGatewayV2",
+            "contributor": "",
+            "description": "Added DISABLE IN PROGRESS and DISABLE FAILED Portal statuses."
+        },
+        {
+            "type": "feature",
+            "category": "Amazon CloudWatch Application Signals",
+            "contributor": "",
+            "description": "This release adds support for creating SLOs on RUM appMonitors, Synthetics canaries and services."
+        },
+        {
+            "type": "feature",
+            "category": "Amazon Polly",
+            "contributor": "",
+            "description": "Add support for Mu-law and A-law codecs for output format"
+        },
+        {
+            "type": "feature",
+            "category": "Amazon S3",
+            "contributor": "",
+            "description": "Add support for maxInFlightParts to multipart upload (PutObject) in MultipartS3AsyncClient."
+        }
+    ]
+}

.changes/next-release/bugfix-AWSSDKforJavav2-a3a0e71.json

@@ -1,4 +1,37 @@
  #### 👋 _Looking for changelogs for older versions? You can find them in the [changelogs](./changelogs) directory._
+# __2.42.21__ __2026-03-25__
+## __AWS Batch__
+  - ### Features
+    - Documentation-only update for AWS Batch.
+
+## __AWS Marketplace Agreement Service__
+  - ### Features
+    - The Variable Payments APIs enable AWS Marketplace Sellers to perform manage their payment requests (send, get, list, cancel).
+
+## __AWS SDK for Java v2__
+  - ### Bugfixes
+    - Fix bug in CachedSupplier that retries aggressively after many consecutive failures
+
+## __AWS User Experience Customization__
+  - ### Features
+    - GA release of AccountCustomizations, used to manage account color, visible services, and visible regions settings in the AWS Management Console.
+
+## __Amazon CloudWatch Application Signals__
+  - ### Features
+    - This release adds support for creating SLOs on RUM appMonitors, Synthetics canaries and services.
+
+## __Amazon Polly__
+  - ### Features
+    - Add support for Mu-law and A-law codecs for output format
+
+## __Amazon S3__
+  - ### Features
+    - Add support for maxInFlightParts to multipart upload (PutObject) in MultipartS3AsyncClient.
+
+## __AmazonApiGatewayV2__
+  - ### Features
+    - Added DISABLE IN PROGRESS and DISABLE FAILED Portal statuses.
+
 # __2.42.20__ __2026-03-24__
 ## __AWS Elemental MediaPackage v2__
   - ### Features
@@ -58,6 +91,9 @@
   - ### Features
     - Updated endpoint and partition metadata.
 
+  - ### Bugfixes
+    - Fix bug in CachedSupplier that disabled InstanceProfileCredentialsProvider credential refreshing after 58 consecutive failures.
+
 ## __Amazon DynamoDB__
   - ### Features
     - Adding ReplicaArn to ReplicaDescription of a global table replica