Issues

• Feature request: Opt-in diagnostic when a metric dimension key is set again with a different value

  aws-powertools/powertools-lambda-java#2733 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Opt-in human-readable (indented) JSON log output for local development

  aws-powertools/powertools-lambda-java#2732 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Clarify the "No metrics were emitted" warning when the ColdStart metric was published

  aws-powertools/powertools-lambda-java#2731 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Include the validated envelope (e.g. detail) in @Validation errors for built-in events

  aws-powertools/powertools-lambda-java#2730 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Opt-in flush of buffered logs on uncaught exceptions for PowertoolsLogging.withLogging

  aws-powertools/powertools-lambda-java#2729 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Allow explicit serialization of custom exception attributes in LambdaJsonEncoder

  aws-powertools/powertools-lambda-java#2728 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: Warn when Lambda ALC log level is less verbose than the log buffering level

  aws-powertools/powertools-lambda-java#2727 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: Log sampling lowers verbosity from TRACE to DEBUG

  aws-powertools/powertools-lambda-java#2726 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: UserAgentConfigurator hides a customer's AWS_SDK_UA_APP_ID environment variable

  aws-powertools/powertools-lambda-java#2725 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: MDC / fluent key-value entries named message, level, timestamp or error produce duplicate JSON members (LambdaJsonEncoder)

  aws-powertools/powertools-lambda-java#2724 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: EventDeserializer.asListOf(String.class) fails when SQS message bodies are plain text

  aws-powertools/powertools-lambda-java#2723 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: Default LambdaJsonEncoder timestamp labels JVM-local time as UTC when TZ is not UTC

  aws-powertools/powertools-lambda-java#2722 · Filter by author hidingmyname opened on Oct 30, 2026

• Bug: Idempotency payload hashing is sensitive to JSON key ordering

  aws-powertools/powertools-lambda-java#2721 · Filter by author hidingmyname opened on Oct 30, 2026

• Feature request: custom idempotency key prefix (keyPrefix), as already supported in the Python runtime

  feature-parityfeature-requestidempotency
  aws-powertools/powertools-lambda-java#2718 · Filter by author hidingmyname opened on Oct 28, 2026
  2

• Bug: BatchMessageHandler implementations can fail or lose failed batch item identifiers when using a custom Executor

  batchbugpending-releasetriage
  Bug

  aws-powertools/powertools-lambda-java#2712 · Filter by author bubanko opened on Oct 25, 2026
  11

  

• Maintenance: Remove dependency on Kafka internal ByteUtils for kafka-clients 4.4.0

  kafkamaintenancetriage
  aws-powertools/powertools-lambda-java#2710 · Filter by author phipag opened on Oct 23, 2026

• Tech debt: Refactor batch module to eliminate code-duplication

  batchmaintenance
  aws-powertools/powertools-lambda-java#2302 · Filter by author phipag opened on Nov 19, 2025

• Maintenance: Consider Using System.Logger as Facade

  feature-requestlogger
  aws-powertools/powertools-lambda-java#2245 · Filter by author AdamBien opened on Oct 30, 2025
  3

• Feature request: Middleware Chain API for Powertools Utilities

  feature-requestRFC
  aws-powertools/powertools-lambda-java#2202 · Filter by author phipag opened on Oct 17, 2025
  5

• Feature request: Improve Batch tools for SNS->SQS->Lambda triggers

  batchfeature-request
  aws-powertools/powertools-lambda-java#2163 · Filter by author kylez-ithaka opened on Sep 30, 2025
  5

• Feature request: Client-Side sampling or similar mechanism to avoid throttling for traces

  feature-requesttracer
  Feature

  aws-powertools/powertools-lambda-java#2105 · Filter by author slavaschmidt opened on Sep 1, 2025
  7

• Docs: Add Build Recipes to documentation

  documentation
  aws-powertools/powertools-lambda-java#2091 · Filter by author phipag opened on Aug 27, 2025
  2

  

• Maintenance: Add workflow to update changelog in GitHub and documentation

  documentationmaintenance
  aws-powertools/powertools-lambda-java#2077 · Filter by author phipag opened on Aug 22, 2025
  9

  

• Feature request: Implement mechanism to update classesloaded.txt file for automatic priming

  blockedfeature-request
  aws-powertools/powertools-lambda-java#2006 · Filter by author phipag opened on Aug 4, 2025
  6

• Feature request: Priming for powertools-serialization

  feature-requestgood-first-issuehelp-wanted
  aws-powertools/powertools-lambda-java#2003 · Filter by author phipag opened on Aug 4, 2025
  7