# NousResearch/hermes-agent · Blocked periodic callbacks stalling agent safety timers

## Open now

- Nothing open on GitHub.

A bug where one blocked periodic scheduler callback could stall all other callbacks, including lease refresh and liveness timers. Multiple fix attempts address this by dispatching periodic callbacks through a bounded worker pool to isolate blocking work.

## TL;DR

- 6 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 4 PR(s) closed without merging.
- A fix was merged to main in PR #106308. Verify it addresses your case.
- **Recommended:** read PR #106308 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-106308`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.40`: the share of member 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.

## Closed / duplicate issues

- #102574: \[Bug\]: Shared periodic scheduler lets one blocked callback stall every safety timer

## Prior & competing PRs

- **#106308: fix(agent): one blocked periodic callback no longer stalls lease refresh and liveness timers (#102574; salvage #105716, same mechanism as #102458)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `agent/periodic_scheduler.py`, `agent/turn_facade_lease.py`, `agent/turn_liveness.py`, `tests/agent/test_periodic_scheduler.py`, `tools/delegate_tool_child_run.py`
- **#102615: fix(periodic_scheduler): dispatch periodic callbacks via bounded worker pool (#102574)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#102458`, `#102574`
- **#102657: fix(agent): dispatch periodic callbacks through worker pool to prevent stalls**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#102574`, `#102458`, `#102574`, `#102615`, `#102458`, `#102458`, `#102458`
- **#104488: fix(agent): dispatch periodic callbacks to a bounded worker pool (#102574)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#102615`, `#102657`, `#102458`, `#102458`, `#102574`
- **#105716: fix(agent): isolate periodic scheduler callbacks from blocking siblings (#102574)**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `2369606f98`, `#106308`, `#102458`

## Fix status

- Merged to main in PR #106308 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-09`.