Cairn
NousResearch/hermes-agent

Race condition between close() and run_turn() in session

Cluster 87422 · agent. Data as of

Nothing open on GitHub. Fix merged in #115758 on 19 Sep 2026. Check it covers your case.

The short answer

0open issues
0open PRs
4items grouped
Known?
Yes. 4 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #115758. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #115758. That is separate from the fix event.
Still open
Nothing open on GitHub.

These issues and fixes address a concurrency race condition where calling close() while run_turn() is executing causes an AttributeError crash instead of a clean interrupt. The work focuses on preventing close() from conflicting with run_turn()'s client reads and poll loop.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

  • #115758 fix(codex-app-server): closing or losing the app-server mid-turn ends the turn cleanly instead of hanging or crashing (#87433, #87422, #83127, salvage #87434 #83129 #87424)

    merged to main

    files: agent/transports/codex_app_server.py, agent/transports/codex_app_server_session.py, tests/agent/transports/test_codex_app_server.py, tests/agent/transports/test_codex_app_server_runtime.py, tests/agent/transports/test_codex_app_server_session.py

2 PRs closed without merging

From the close comments: duplicate 1 · merged via another change 1

  • #87424 fix(codex-app-server): stop close() racing run_turn()'s poll loop · merged via another change → 1db043b, #115758, #87433, #87422, #83127, #87434, #83129, #87424
  • #91769 fix: race between close() and run_turn's self._client reads crashes turns · duplicate → #87424
Closed issues · 1
  • Closed#87422[BUG]:codex_app_server_session: close() racing run_turn() raises AttributeError instead of a clean interrupt
How this cluster was grouped
  • Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
  • Pairwise link density 0.50: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. 1.00 means every pair is linked.

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At a glance

Subsystem
agent
Merged PRs
#115758
Closed issues
1
Attempts
2 PRs closed without merging
Fix link checked
19 Sep 2026

For your agent

The same facts, typed.

cluster/87422.json
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