Issues

• ClusterSingletonManager does not release a lease acquired after it stops in AcquiringLease

  apache/pekko#3789 · Filter by author pjfanning opened on Nov 13, 2026

• Topic drops messages published before its first receptionist listing

  apache/pekko#3761 · Filter by author pjfanning opened on Nov 8, 2026 · 2.1.0

• Scala 2.13 function literals no longer compile against overloaded typed javadsl methods after wildcard widening (#3720)

  apache/pekko#3750 · Filter by author pjfanning opened on Nov 6, 2026
  1

• Test determinism: AGENTS.md rules have no enforcement, no in-repo known-flaky list, and the time-dilation contract is inconsistent across three APIs

  enhancementflakymake-tests-easier-to-run
  apache/pekko#3696 · Filter by author He-Pin opened on Oct 24, 2026

• CI captures no thread dump when a job hangs, and PR validation jobs have no timeout-minutes

  buildenhancementgithub_actions
  apache/pekko#3695 · Filter by author He-Pin opened on Oct 24, 2026

• No committed wire-format fixtures: internal protocol serialization is only covered by same-version round trips

  enhancement
  apache/pekko#3694 · Filter by author He-Pin opened on Oct 24, 2026

• Multi-node testkit: Controller blocks on a Netty future inside its message handler, and the conductor port defaults to a fixed 4711

  bugflakymake-tests-easier-to-run
  apache/pekko#3693 · Filter by author He-Pin opened on Oct 24, 2026

• OutboundHandshake.postStop drops an already-dequeued pendingMessage, bypassing the pending-system-message quarantine safeguard

  bug
  apache/pekko#3690 · Filter by author He-Pin opened on Oct 24, 2026

• Shard.awaitingLease stashes HandOff, so a rebalance cannot complete while the shard lease is unobtainable

  bugcluster
  apache/pekko#3686 · Filter by author He-Pin opened on Oct 24, 2026

• Use staged persistence effect APIs to restrict unsafe chaining

  apache/pekko#3683 · Filter by author He-Pin opened on Oct 24, 2026 · 2.1.0

• Artery: messages from a peer with a colliding system uid can still reach the receiver

  apache/pekko#3672 · Filter by author pjfanning opened on Oct 23, 2026 · 2.1.0
  3

• TcpConnectionSpec incoming-data test intermittently times out waiting for Tcp.Received

  apache/pekko#3626 · Filter by author He-Pin opened on Oct 13, 2026

• dispatcher: a rejected execution permanently strands a non-empty mailbox, and the rejection-reporting path recurses into StackOverflowError

  bug
  apache/pekko#3613 · Filter by author He-Pin opened on Oct 10, 2026
  2

  

• stream: synchronous source queue with overflow strategies (ConcurrentLinkedQueue-backed dropHead)

  apache/pekko#3612 · Filter by author He-Pin opened on Oct 10, 2026
  

• MergeLatest does not backpressure upstreams and buffers without bound

  apache/pekko#3592 · Filter by author pjfanning opened on Oct 8, 2026 · 2.1.0
  2

• support the Secret Service API

  apache/pekko#3401 · Filter by author pjfanning opened on Jul 30, 2026
  1

• LeveldbJournalNativeSpec fails on macOS ARM64 because leveldbjni-all lacks an arm64 library

  apache/pekko#3327 · Filter by author He-Pin opened on Jul 11, 2026

• Address already in use

  apache/pekko#3326 · Filter by author He-Pin opened on Jul 11, 2026

• Flaky test: RemotingSpec "should resume the outbound reader when passive read handoff fails" on Scala 3

  apache/pekko#3308 · Filter by author He-Pin opened on Jul 9, 2026

• Explore a new design of dispatcher？

  apache/pekko#3254 · Filter by author He-Pin opened on Jun 28, 2026

• Classic Transport: Add Parallel Serialization/Deserialization via Netty Pipeline Executor

  enhancement
  apache/pekko#3204 · Filter by author He-Pin opened on Jun 27, 2026
  6

• Add health check support for Persistence journal and snapshot store

  apache/pekko#3128 · Filter by author He-Pin opened on Jun 22, 2026

• Add OpenTelemetry end-to-end trace context propagation for Pekko Streams

  akkadotnetenhancementt:stream
  apache/pekko#3107 · Filter by author He-Pin opened on Jun 20, 2026
  5

• GroupBy should support infinite substreams with maxSubstreams=-1

  akkadotnetenhancementt:stream
  apache/pekko#3102 · Filter by author He-Pin opened on Jun 20, 2026
  1

• AbstractRemoteSendConsistencySpec actorSelection preserving order test now flaky

  flaky
  apache/pekko#3089 · Filter by author pjfanning opened on Jun 19, 2026
  5