# NousResearch/hermes-agent · Worker deadlock from backgrounded shell process pipe issue

## Open now

- Nothing open on GitHub.

A bug where backgrounding a server process via shell '&' causes a worker deadlock due to orphaned subshells holding stdout pipes open. Members include the bug report and several related fixes targeting the pipe-blocking and shell syntax rewrite problems.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #71008. Verify it addresses your case.
- **Recommended:** read PR #71008 (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-71008`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.50`: 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

- #68915: \[Bug\]: Worker deadlocks when agent backgrounds a server via shell \`&\` (orphaned subshell holds stdout pipe open)

## Prior & competing PRs

- **#71008: fix(terminal): stop background reader blocking on orphan-held stdout pipes**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `tests/tools/test_process_registry.py`, `tools/process_registry.py`
- **#68935: fix(terminal): fix compound-background rewrite bugs (syntax error + unhandled paren subshell)**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`
- **#70549: fix(tools): prevent worker deadlock when agent backgrounds server via shell & (#68915)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `d7512c868`, `#70876`

## Fix status

- Merged to main in PR #71008 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-07-24`.