The GitHub Actions job "Pull Requests" on pekko.git/fix/remote-send-consistency-flaky has succeeded. Run started by GitHub user He-Pin (triggered by He-Pin).
Head commit for run: 658433a1684b35481f46d904cd5820870fa69e95 / 虎鸣 <[email protected]> fix(artery): distribute ActorSelection messages across lanes by target path Motivation: The "must be able to send messages with actorSelection concurrently preserving order" test flakes on CI: 4 sender actors each drive 1000 round-trips via ActorSelection (4004 messages total). With multi-lane artery config (outbound-lanes > 1), all ActorSelection messages are routed to the same outbound queue because selectQueue uses the anchor's UID as the distribution key. The anchor for ActorSelection is the root guardian (RootActorPath), whose UID is always 0 (ActorCell.undefinedUid). So math.abs(0 % N) = 0 for any N — all ActorSelection traffic concentrates on lane 0 while other lanes sit idle. Similarly, inbound lane partitioning uses the wire recipient's UID (root guardian = 0), concentrating all inbound ActorSelection processing on a single inbound lane. Modification: Outbound: Add a dedicated case for ActorSelectionMessage in Association.send that computes the queue index from the selection's target path elements hash instead of the anchor's UID. PriorityMessage ActorSelection (cluster heartbeats) continues going through the control queue. Inbound: Update ArteryTransport.inboundLanePartitioner to parse the ActorSelectionMessage's target path from the envelope byte buffer and use it as the destination hash key, distributing inbound ActorSelection processing across all inbound lanes. Result: ActorSelection messages are distributed across all outbound and inbound lanes based on target path, eliminating the single-lane throughput bottleneck while preserving per-path message ordering. Tests: sbt -Dpekko.test.timefactor=2 "remote / Test / testOnly *SendConsistency*" — 24/24 passed (all 6 spec variants) sbt "remote / mimaReportBinaryIssues" — clean References: Fixes #3089 Report URL: https://github.com/apache/pekko/actions/runs/27851792474 With regards, GitHub Actions via GitBox --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
