v5.3

Issues

• Concurrent multi-path deliveries of the same write all persist an audit entry: identity-tie dedup is a read-then-check with no serialization

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  Bug

  HarperFast/harper#2485 · Filter by author kriszyp opened on Sep 3, 2026 · v5.3
  2

  

• Requests are served on job worker threads, where the application's tables aren't loaded — 500s for ~30s after every rolling deploy (5.2.x)

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  Bug

  HarperFast/harper#2671 · Filter by author Devin-Holland opened on Sep 17, 2026 · v5.3

• MQTT "Session disconnected while trying to send message to" error drops the topic

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  Bug

  HarperFast/harper#3299 · Filter by author kriszyp opened on Oct 19, 2026 · v5.3

• MQTT: anonymous-client disconnect fails will cleanup with AccessViolation ("Must login") on system.hdb_session_will

  bug

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  Bug

  HarperFast/harper#1874 · Filter by author harper-joseph opened on Jul 20, 2026 · v5.3
  5

  

• RocksDB WriteBufferManager stall (writeBufferManagerAllowStall=true default) wedges every writer until restart — root cause of #2450

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  Bug

  HarperFast/harper#2490 · Filter by author Devin-Holland opened on Sep 3, 2026 · v5.3
  4

  

• Live-subscription re-authorization revokes mTLS clients with no hdb_user that a resource's allowRead admitted

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  Bug

  HarperFast/harper#4062 · Filter by author harper-joseph opened on Nov 5, 2026 · v5.3

• 5.3.7 release notes: a certificate client's principal is a copy of a server.getUser override's result

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  Task

  HarperFast/harper#4133 · Filter by author harper-joseph opened on Nov 9, 2026 · v5.3