Jinwoo Hong 84f58a1fc7 fix(relay): refuse a redial at once while the host's own release holds its row (#24225)
* fix(relay): refuse a redial at once while the host's own release holds its row

During an Asia drain the host whose socket closes is the one that redials.
Its release on the draining cell locks its assignment row first, then waits
on the cell's busy row for up to the lock timeout. The director's sticky
and placement paths waited on that assignment row inside the single sticky
slot, and the sticky path then locked the busy cell row itself before it
checked isolation. The slot backed up and dials timed out fleet-wide.

Both paths now take the host's assignment row NOWAIT and throw
RelayAssignmentRowBusyError when it is held. /v1/assign answers that with
503, Retry-After 1 and error assignment_row_busy, logged with its own
reason. The sticky path decides isolation before it touches the pinned
cell row. An isolated retry keeps its own tier as its retry scope, so a
busy lock inside it no longer falls to the all-rows path. The local drain
arm drops its zero-release-failures bar, which the Asia arm never had.

The drain harness gains a departing-host arm: each host releases its own
lease, then redials after 150, 400 or 1000 ms on the desktop client's
5-5.5 s pacing. At 400 ms, main rejected 83 of 180 first dials by sticky
wait timeout, placed 11.6/s with 3.1 director backends lock-waiting, and
took 11.2 s at p95 from release to placed. Now: 16 fast refusals, 18/s,
no lock waits, 5.7 s at p95.

Claude-Session: ced32ebb-7155-4413-adad-1eccd14c2010

* fix(relay): wait briefly for a calm host's row and keep the dead-cell sweep going

The dead-cell sweep treated RelayAssignmentRowBusyError as fatal, so one
busy host ended the sweep for every later host each tick. It now skips
that host and carries on.

The sticky path refused a busy row at once for every host. A calm host
redialling after its own clean close often meets its own short release,
and a refusal costs it the client's 5 s assign gate. When the pinned cell
is general and live, the sticky path now waits up to 1 s for the row
before refusing. A roll-isolated, parked or dead cell still gets the
immediate refusal. Placement keeps NOWAIT, because it holds cell rows
while it would wait. A resume refused for a busy row now carries
Retry-After 1 as well.

The departing-host harness arm now bounds the busy refusals at 20% of
hosts and the p95 at 8 s, and counts unexpected errors apart from
retryable refusals.

Claude-Session: ced32ebb-7155-4413-adad-1eccd14c2010

* fix(relay): never wait on a host's row while the sticky retry holds its cell row

The inventory-first sticky retry takes the pinned cell row before the
assignment row. With the calm-host bounded wait it could then wait up to
1 s on the assignment row while holding the cell row, the reverse of the
ranked lock order, against this host's own release, which holds its row
and wants the cell's. The bounded wait now applies only when no cell row
is held; the retry stays NOWAIT.

Claude-Session: ced32ebb-7155-4413-adad-1eccd14c2010
2026-09-30 17:58:30 -04:00
2026-09-30 12:44:27 +00:00
2026-09-26 20:50:46 +00:00
2026-05-04 20:42:03 -07:00
2026-03-16 22:27:51 -07:00
2026-03-28 10:19:14 -07:00

Orca Orca

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The AI Orchestrator for 100x builders.
Run Codex, ClaudeCode, OpenCode or Pi side-by-side — each in its own worktree, tracked in one place.

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Orca desktop app running agents in parallel worktrees, with the Orca mobile companion app in the corner

Features

Mobile Companion

Monitor and steer your agents from your phone — get notified when an agent finishes and send follow-ups from anywhere.

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Parallel worktree orchestration

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Agents drive Orca too — script every workflow with orca worktree create, snapshot, click, and fill.

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Also in the box:

  • Quick open — Search across worktrees, files, agents, commands, and repo context without leaving your flow.
  • Account switcher & usage tracking — See Claude and Codex usage and rate-limit resets, and hot-swap accounts without re-logging in.
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  • And many, many more — we ship daily, so this list is perpetually behind. The changelog is the real feature list.

Supported Agents

Works with any CLI agent — if it runs in a terminal, it runs in Orca.

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# macOS (Homebrew)
brew install --cask stablyai/orca/orca

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yay -S stably-orca-bin

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Developing

Want to contribute or run locally? See our CONTRIBUTING.md guide.

The relay that pairs the mobile app with a desktop host is also in this repository under cloud/, with a separate pnpm workspace and setup guide.

Orca contributors

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License

Orca is free and open source under the MIT License.

S
Description
Orca is the ADE for working with a fleet of parallel agents. Run any coding agent with your own subscription. Available on desktop, mobile and remote runtime.
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