2.5.27

• Adds: a backlog/retry mechanism for commands issued while a connection isn't available (#1912 by @NickCraver)
  • Commands will be queued if a multiplexer isn't yet connected to a Redis server.
  • Commands will be queued if a connection is lost and then sent to the server when the connection is restored.
  • All commands queued will only remain in the backlog for the duration of the configured timeout.
  • To revert to previous behavior, a new ConfigurationOptions.BacklogPolicy is available - old behavior is configured via options.BacklogPolicy = BacklogPolicy.FailFast. This backlogs nothing and fails commands immediately if no connection is available.
• Adds: Makes StreamEntry constructor public for better unit test experience (#1923 by @WeihanLi)
• Fix: Integer overflow error (issue #1926) with 2GiB+ result payloads (#1928 by @mgravell)
• Change: Update assumed redis versions to v2.8 or v4.0 in the Azure case (#1929 by @NickCraver)
• Fix: Profiler showing EVAL instead EVALSHA (#1930 by @martinpotter)
• Performance: Moved tiebreaker fetching in connections into the handshake phase (streamline + simplification) (#1931 by @NickCraver)
• Stability: Fixed potential disposed object usage around Arenas (pulling in Piplines.Sockets.Unofficial#63 by @mgravell)
• Adds: Thread pool work item stats to exception messages to help diagnose contention (#1964 by @NickCraver)
• Fix/Performance: Overhauls pub/sub implementation for correctness (#1947 by @NickCraver)
  • Fixes a race in subscribing right after connected
  • Fixes a race in subscribing immediately before a publish
  • Fixes subscription routing on clusters (spreading instead of choosing 1 node)
  • More correctly reconnects subscriptions on connection failures, including to other endpoints
• Adds "(vX.X.X)" version suffix to the default client ID so server-side CLIENT LIST can more easily see what's connected (#1985 by @NickCraver)
• Fix: Properly including or excluding key names on some message failures (#1990 by @NickCraver)
• Fix: Correct return of nil results in LPOP, RPOP, SRANDMEMBER, and SPOP (#1993 by @NickCraver)