NousResearch/hermes-agent
MCP stdio tool calls leak un-awaited coroutine
Cluster 100472 · mcp. Data as of
1 open item. Fix merged in #100920 on 2 Sep 2026. Check it covers your case.
The short answer
0open issues
1open PR
4items grouped
- Known?
- Yes. 4 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #100920. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
resolved, deciding PR #100920. That is separate from the fix event. - Still open
- 0 issues and 1 PR.
A bug causes an un-awaited watcher coroutine to be leaked on every MCP stdio tool call, producing RuntimeWarnings. Multiple fixes target this coroutine leak in the stdio fast-fail gate.
Open issues0
Open PRs1
- PR#100478fix(mcp): close leaked coroutine in stdio fast-fail gate (Closes #100472)
Fixes on record
-
#100920 fix(mcp): stdio tool calls no longer leak an un-awaited watcher coroutine per call (#95938, salvage #96251)
files:
tests/tools/test_mcp_stdio_children_dead.py,tools/mcp_tool.py
1 PR closed without merging
From the close comments: closed without comment 1
- #100476 fix(mcp): close leaked coroutine in stdio fast-fail gate · closed without comment
Closed issues · 1
- Closed#100472MCP stdio tool calls leak an un-awaited coroutine (RuntimeWarning on every call)
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structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Subsystem
- mcp
- Merged PRs
- #100920
- Closed issues
- 1
- Attempts
- 1 PR closed without merging
- Fix link checked
- 2 Sep 2026