[Bug] Desktop update fails: "Host did not complete graceful task teardown (graceful deadline exceeded)" — 0.2.1-rc.2 → 0.2.1-rc.3, win32 x64

[PetrichorIRIS]

Summary

Desktop auto-update from 0.2.1-rc.2 → 0.2.1-rc.3 fails every time with:

desktop update: Host did not complete graceful task teardown
(exit null, signal SIGTERM, shutdown acknowledged true, graceful deadline exceeded true)

The installer downloads and verifies correctly; the failure is entirely in the graceful shutdown step before install.

Environment

App	@deepseek-ai/dsh-desktop 0.2.1-rc.2
Target	0.2.1-rc.3
Electron	44.7.0
Node	24.21.0
OS	Windows 11, win32 x64
Locale	zh-CN
Update channel	nightly
Feed	https://download.deepseek.com/dsh-desk/feeds/win-x64/
Install dir	D:\DeepSeek Harness\

What was ruled out

The downloaded artifact is fine — the update package is not the problem:

path   : %LOCALAPPDATA%\@deepseek-aidsh-desktop-updater\pending\deepseek-harness-0.2.1-rc.3-win-x64.exe
size   : 289,415,960 bytes          — exactly matches feed `size`
sha512 : q5IGr2Bf+TvvCpagHj49Ypn/ZrqR7kqrYpLjqXP7VfDINmddlqZQmG+YfsdL3q3EdTRMRlKz/a3jDAEzdNdDOw==
         — exactly matches feed `sha512`
sig    : Valid, CN="Hangzhou DeepSeek Artificial Intelligence Co., Ltd."
version: 0.2.1-rc.3

Also ruled out: disk space (66 GB free), file permissions, network reachability (feed + binary both download fine).

Timeline (2026-10-28)

10:54:07  updater starts fetching current.blockmap
10:54:21  rc.3 installer downloaded (276 MB)
10:54:23  pending\update-info.json written
10:54:36  graceful shutdown attempted -> FAILED (graceful deadline exceeded)
10:54:36  app relaunched, still 0.2.1-rc.2

The verified installer is still sitting in pending\ afterwards, confirming download succeeded and only teardown failed.

Likely cause: a plugin/task blocks teardown past the deadline

This profile has 18 third-party bundles / 245 plugin rows. Several of them own background lifecycles that plausibly outlive a short grace window:

• dsh-mnemon (+17 sub-packages) — memory system with idleReviewMs: 30000 timer
• @nanmicoder/dsh-agent-teams — multi-agent team, may hold active tasks
• dsh-better-sidebar — file watchers / sidebar services
• @yuxianglin/dsh-bridge-browser — websocket carrier daemon
• dsh-free-search / dsh-find-plugin — in-flight network fetches
• dshmarket — market connection

If graceful shutdown waits on host tasks without a hard cancel for extension-owned tasks, a deadline miss is inevitable.

Suggested fixes

1. Hard timeout + force kill: after the grace deadline, SIGKILL the whole child process tree instead of failing the update.
2. Decouple shutdown from install: a failed teardown should not void the update — offer to install on next launch.
3. Log what blocked teardown: the current message names no blocking task/plugin, so neither user nor developer can act on it. Include elapsed wait time and the list of pending tasks / loaded plugins.
4. Consider disabling non-official plugins before update and restoring them after.
5. Fall back to launching the downloaded installer directly when teardown fails.

Workaround (works today)

Run the already-downloaded, signature-verified installer manually while the app is closed:

%LOCALAPPDATA%\@deepseek-aidsh-desktop-updater\pending\deepseek-harness-0.2.1-rc.3-win-x64.exe

or download directly:

https://download.deepseek.com/dsh-desk/bin/win-x64/deepseek-harness-0.2.1-rc.3-win-x64.exe

This bypasses the teardown step and installs successfully.

Note

No crash-*.log was produced for this event — the log directory's newest entry is still 2026-10-24. A graceful-shutdown timeout is silent, which makes it hard to diagnose from the user side.