• Add port manager to C and Java drivers to allow for a limited range of ports that can be used when subscription endpoint addresses and publication control addresses specify a port of 0. This can make network access configuration simpler (Driver).
• Wait for end of stream event on the log instead of the counter becoming unavailable before entering into a new Election (Cluster).
• Close log publications before trying to stop recording to speed up graceful leader step down (Cluster).
• Ignore resting subscription positions when calculating join position or draining driver entities when tethering is being used (C Driver).
• Extensions points to support Standby Snapshots (Cluster).
• Ensure that the clusterDirectoryName field is synced with the clusterDir configuration parameter during conclude in ConsensusModule and ClusterBacker (Cluster).
• Cluster tutorial updates (Documentation).
• Extract invocation of background work in the service container.
• Do not fail if Aeron directory exists, but the CnC file does not (C Driver).
• Use aeron_errcode to get the latest error code when reporting problems creating the Aeron directory (C Driver).
• Don't let a bounded replay go beyond counter value to stop position so commit position can be used for replay (Archive).
• Add addition example Authentication and Authorisation services (Archive/Cluster).
• Add additional documentation to specify details when Authorisation is used (Archive/Cluster).
• Clarify logic about extending a replay while being bounded (Archive).
• Changes to host name resolution on start up (Driver).
  • Perform host name resolution once and track its execution time via the duty cycle tracker and the event log.
  • Use <unresolved> as a host name if it cannot be resolved instead of null.
  • Fix GCC 9 warning
  • Await initial counters being updated by the conductor thread before reading the values.
• Trigger graceful leader close election based on recording stop signal (Archive).
• Add end of stream position to Subscriptions (Client).
• Allow for relocatable mark files for the ConsensusModule, ClusteredServiceContainer, and ClusterBackup (Cluster).
• Move close operations on MDS transports on the conductor not the receiver thread (C Driver).
• Allow preparing for new leadership to be less serial to reduce election time (Cluster).
• Async removal of destinations as log adaptor closes when preparing for election (Cluster).
• Fix CMD_OUT_ERROR log format (C Driver).
• Fix aeron_err_clear() (C).
• C driver handle untethered subscritions correctly, ensure that tethering behaviour matches Java driver (C Driver).
• Fix name in toString (Java Client).
• Improve error message (C++ Archive Client).
• clean up Apple M1 compilation. Move loss recporter function into compilation unit. Add pragmas to account for unused but set variables (C).
• Add logging to track information when a ReplicationSession ends (Archive).
• Add deduplication step for aeron-agent jar.
• Add deduplication step for aeron-all jar.
• Add an annotation processor to generate a version class for a number of the Aeron packages.
• Include the git sha in the version C binaries.
• Extract untetheredWindowLimit method.
• Upgrade to SBE 1.29.0.
• Upgrade to JUnit 5.10.0.
• Upgrade to Agrona 1.19.1.