AWS SDK for Java v2 2.49.1

2.49.1 2026-07-22

ARC - Region switch

• Features

  • Adds support for a client token in StartPlanExecution to make plan execution requests idempotent for safe retries.

AWS CRT HTTP Client

• Bugfixes

  • Do not set the Content-Length header on a request that already carries Transfer-Encoding. Emitting both violates RFC 7230 and was rejected by the underlying CRT layer; this aligns the CRT client with the Netty client's existing behavior for chunked requests.

AWS Parallel Computing Service

• Features

  • AWS PCS Node Lifecycle Actions provides a structured way to run custom scripts at defined points in a compute node's lifecycle directly through the AWS PCS compute node group API.

AWS SDK for Java v2

• Features

  • Updated endpoint and partition metadata.

Amazon CloudWatch

• Features

  • Adds documented value constraints for CloudWatch Log Alarm scheduled query configuration fields, and makes LogGroupIdentifiers optional for log alarms.

Amazon GuardDuty

• Features

  • Amazon GuardDuty now returns filter lifecycle metadata in GetFilter responses. The response includes createdAt and updatedAt timestamps and a version number that increments on each update, giving you visibility into when a filter was created and last modified.

Amazon Prometheus Service

• Features

  • Add CloudWatch dataset destinations for Amazon Managed Service for Prometheus collectors.

Amazon S3

• Bugfixes

  • Fix a race condition in multipart upload with low maxInFlightParts where CompleteMultipartUpload could be initiated while the final part was still uploading.

Amazon Simple Email Service

• Features

  • Launching DEED and MREP in US GOV

CloudWatch Observability Admin Service

• Features

  • Enablement for ALB and Bedrock Knowledge Base logs via Observability Admin Telemetry Rule for account and organization level

Elastic Load Balancing

• Features

  • This adds CLI examples for the IpAddressType field on SourceIpConfig, enabling Network Load Balancer listener rules to match traffic based on whether the source IP is IPv4 or IPv6.

Partner Central Account API

• Features

  • Adds Qualifications Association APIs that enable partners to associate a subsidiary account's qualifications with a primary account. Once associated, qualifications are shared across all connected accounts and scorecards are consolidated. Partners can start and track association and disassociation.