Move task status updates onto the RPC loop.

[rjpower]

No description provided.

[claude]

Claude finished @rjpower's task in 5m 50s —— View job

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Code review

No issues found. Checked for bugs and CLAUDE.md / AGENTS.md compliance.

What was reviewed

• @on_loop decorator and AsyncServiceAdapter wiring in lib/iris/src/iris/rpc/async_adapter.py — marker is correctly detected on bound methods (attribute lookup proxies through __func__).

• set_task_status_text annotated with @on_loop in lib/iris/src/iris/cluster/controller/service.py — handler delegates to two plain dict writes in ControllerTransitions.record_task_status_text; no I/O or locks, safe to run inline on the event loop. Concurrent reads from thread-pool handlers are GIL-atomic.

• scheduler_min_interval bumped to 10.0s (now == scheduler_max_interval) in lib/iris/src/iris/cluster/controller/controller.py — ExponentialBackoff is well-defined when initial == maximum; effectively a fixed 10s cadence.

• New JSONL OutputFormat and default-format swap in lib/finelog/src/finelog/deploy/cli.py — printer is registered correctly in _PRINTERS.

• Dashboard comment addition in lib/iris/src/iris/cluster/controller/dashboard.py — accurate clarification of the on-loop vs. threaded dispatch model.

• Check PR review eligibility

• Identify relevant CLAUDE.md / AGENTS.md files

• Summarize PR changes

• Run parallel review agents (compliance + bugs + logic/security)

• Validate found issues

• Post review
  • Branch: claude/pr-5768-20260515-1806

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[chatgpt-codex-connector]

Keep SetTaskStatusText off the ASGI event loop

Decorating set_task_status_text with @on_loop moves this hot push-path onto the single-threaded ASGI event loop, so bursts of status updates from many running tasks are handled serially and can queue unrelated RPCs behind them. In practice this can degrade controller responsiveness (e.g., job control and worker RPC latency) under load, because AsyncServiceAdapter runs @on_loop handlers inline instead of asyncio.to_thread.

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