1.33.1 (March 21, 2025)

Bug fixes

Changes expected to improve the state of the world and are unlikely to have negative effects

  • connection pool: Fixed a bug in preconnecting where established connection unused capacity was not considered in the logic to establish new connections, resulting in new connections anytime there was not a connection currently in the process of being established. This resulted in far too many connections being established, with the only bounds being cluster circuit breaker limits or upstream service limits.

  • ext_proc: Fixes a bug where local replies were incorrectly sent to the ext_proc server for external processing. This change can be temporarily reverted by setting runtime guard envoy_reloadable_features_skip_ext_proc_on_local_reply to false.

  • router: Fixes an Envoy crash issue when a local reply is sent. This change can be temporarily reverted by setting runtime guard envoy_reloadable_features_router_filter_resetall_on_local_reply to false.