Issues

• Rotating the JetStream encryption key with prev_encryption_key re-keys blocks lazily, never re-keys consumers, and a later boot deletes unconverted blocks

  nats-io/nats-server#8884 · Filter by author sahina opened on Nov 11, 2026

• Crash during stream creation leaves meta.inf without meta.sum; the re-created stream then loses all acknowledged messages on the next restart

  defect
  nats-io/nats-server#8872 · Filter by author kunalgoesbyken opened on Nov 7, 2026
  1

  

• Add optional /healthz to websocket listener

  proposal
  nats-io/nats-server#8869 · Filter by author champtar opened on Nov 6, 2026

• Data race: applyStreamMsgOp checks the stream's inflight maps for nil without clMu while batchStagedDiff.commit allocates them

  nats-io/nats-server#8859 · Filter by author MaxRenaud opened on Nov 6, 2026
  1

• MQTT clients subscribing to # receive _INBOX messages

  defect
  nats-io/nats-server#8848 · Filter by author kryops opened on Nov 4, 2026
  2

• Server panic on startup when a stream's limits cannot be applied to an unreadable block

  nats-io/nats-server#8840 · Filter by author vskiwi opened on Nov 3, 2026

• Data race between a leaf connection's auth timeout and processLeafNodeConnect (c.leaf.remoteCluster)

  nats-io/nats-server#8826 · Filter by author LeVadim opened on Nov 2, 2026
  1

• A Discard New mirror at its MaxMsgs stops for good behind the first message it refuses, and never stores later messages that fit (v2.15.2)

  nats-io/nats-server#8825 · Filter by author LeVadim opened on Nov 2, 2026

• Replies to the first concurrent requests on a new server can be dropped

  defect
  nats-io/nats-server#8823 · Filter by author JoobyPM opened on Nov 2, 2026
  1

• Data race between (*fileStore).ConsumerStore and (*fileStore).UpdateConfig

  defect
  nats-io/nats-server#8822 · Filter by author JoobyPM opened on Nov 2, 2026
  1

• Even when msg.AckSync() returns success, if standalone server is killed the Ack may not be stored and the message may be resent to the durable consumer

  defect
  nats-io/nats-server#8821 · Filter by author codyps opened on Nov 1, 2026
  1

• Add publishing groups for sequence validation and deduplication in JetStream

  proposal
  nats-io/nats-server#8819 · Filter by author yueliangwen opened on Nov 1, 2026
  4

• Queue group drops a message when a new member subscribes and the old member unsubscribes moments later

  nats-io/nats-server#8816 · Filter by author pacepace opened on Oct 30, 2026

• Send async INFO to connected clients when account JWT limits change (e.g. max_payload)

  defect
  nats-io/nats-server#8814 · Filter by author choufraise opened on Oct 30, 2026
  4

• Group commit for sync_interval: always on single-server streams

  proposal
  nats-io/nats-server#8810 · Filter by author prithsk opened on Oct 29, 2026
  2

• Durable consumer delete + concurrent recreate (same name) corrupts state or loses messages -- unsynchronized store paths

  nats-io/nats-server#8793 · Filter by author tritsystem opened on Oct 22, 2026
  1

• MQTT: retained PUBLISH stops the readLoop for each JetStream store; clients disconnect on keepalive

  nats-io/nats-server#8790 · Filter by author dev10231235 opened on Oct 21, 2026

• R1 pull consumer stuck after server stall: message redelivered every AckWait, client ACKs ignored until server restart

  defect
  nats-io/nats-server#8789 · Filter by author SerAlxVeeam opened on Oct 21, 2026
  2

• Leaf node permission check caches subject that aliases read buffer → unbounded Sublist cache growth / OOM

  defect
  nats-io/nats-server#8787 · Filter by author ordeneaux opened on Oct 21, 2026
  5

  

• Operator-mode auth-callout clients disconnect on additive MEMORY resolver reload

  nats-io/nats-server#8781 · Filter by author davidfarah2003 opened on Oct 20, 2026
  2

• EnableJetStream(nil) on test servers shares a fixed $TMPDIR/nats/jetstream store across servers and runs

  nats-io/nats-server#8754 · Filter by author shreyaabaranwal opened on Oct 13, 2026
  3

• R3 interest stream: followers pause quorum (applied 100k behind commit) and catch-up loops on snapshot replay at ~1.4k msg/s on idle hardware after cluster restart (2.14.6)

  nats-io/nats-server#8738 · Filter by author ops-gaurav opened on Oct 8, 2026
  1

• Add S2 compression support for gateway connections

  proposal
  nats-io/nats-server#8719 · Filter by author stackedbyaradhya opened on Oct 5, 2026

• Automated RAFT leader rebalancing

  proposal
  nats-io/nats-server#8716 · Filter by author kryops opened on Oct 5, 2026

• Memory leak after dynamic config reload

  defect
  nats-io/nats-server#8697 · Filter by author alyssaruth opened on Oct 2, 2026
  4