mirror of
https://github.com/nesquena/hermes-webui.git
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Isla Liu
126 lines
8.3 KiB
Markdown
126 lines
8.3 KiB
Markdown
# Troubleshooting
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Concrete diagnostic flows for the most common failure modes when running Hermes WebUI. Each entry has the symptom, the diagnostic commands you should run *before* opening an issue, and the fix that has worked for past reporters.
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If your symptom isn't listed and the diagnostics don't narrow it down, file a bug at https://github.com/nesquena/hermes-webui/issues — include the relevant command output after redacting secrets, private paths, full `.env` files, full `auth.json` files, cookies, tokens, and password hashes.
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---
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## "AIAgent not available -- check that hermes-agent is on sys.path"
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**Symptom.** WebUI starts, shows the chat interface, but every chat request fails immediately with this error in the response or the server log. As of v0.51.6 the error includes a diagnostic block with the running Python interpreter, the relevant `sys.path` entries, and the most-common fix; on older versions the message is bare.
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**Why it happens.** The WebUI imports the agent class at chat time via `from run_agent import AIAgent`. That import only succeeds if the running Python's `sys.path` contains either the hermes-agent checkout or a pip-installed copy of the agent. Three common failure modes:
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1. **Agent installed but not on `sys.path`.** Most common. The agent is checked out somewhere (e.g. `~/Programmes/hermes-agent`), the WebUI was launched with a Python that doesn't know about it, and there's no `pip install -e .` linking the two.
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2. **Symlink with a typo or wrong target.** A symlink to the agent looks correct on `ls`, but `readlink` resolves to a path that doesn't exist or doesn't contain `agent/__init__.py`.
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3. **`HERMES_WEBUI_AGENT_DIR` set to the wrong directory.** Override env var beats auto-discovery and points at a directory that has no agent code.
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### Step 1 — confirm the agent location
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```bash
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# If you have ~/hermes-agent (the default location):
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ls -la ~/hermes-agent
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readlink ~/hermes-agent # if it's a symlink, where does it resolve?
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ls ~/hermes-agent/agent/__init__.py 2>&1
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```
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The third command must succeed (the file must exist). If it fails, your symlink is broken or pointing at a directory that's missing the agent module — fix that first.
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### Step 2 — confirm the WebUI is using the right Python
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```bash
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cd ~/hermes-webui && ./start.sh 2>&1 | grep -iE 'agent|python|hermes_webui_python' | head -20
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```
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The startup banner prints which Python and agent dir it resolved. If the agent dir is empty or the Python is the wrong one, set the override:
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```bash
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export HERMES_WEBUI_AGENT_DIR=/absolute/path/to/hermes-agent
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export HERMES_WEBUI_PYTHON=/absolute/path/to/agent/venv/bin/python
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./start.sh
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```
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### Step 3 — install the agent in editable mode
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This is the most common fix and resolves the original issue #1695:
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```bash
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cd /path/to/hermes-agent # the directory holding pyproject.toml + the agent/ module
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pip install -e . # use the same python that runs the WebUI
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```
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Then restart the WebUI:
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```bash
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cd ~/hermes-webui
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./start.sh
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```
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### Step 4 — verify by importing manually
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If steps 1-3 still don't work, check whether the WebUI's Python can import the agent at all:
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```bash
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$HERMES_WEBUI_PYTHON -c "from run_agent import AIAgent; print('ok')" 2>&1
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```
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(Replace `$HERMES_WEBUI_PYTHON` with the actual Python path from step 2 if the env var isn't set.) If this prints `ok`, the agent IS on `sys.path` for that Python — and the WebUI should work.
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If this fails, `import run_agent` itself is broken — check that the agent's pyproject.toml lists `run_agent` as a top-level module or that the agent dir is on PYTHONPATH:
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```bash
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PYTHONPATH=/path/to/hermes-agent $HERMES_WEBUI_PYTHON -c "from run_agent import AIAgent; print('ok')"
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```
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If adding PYTHONPATH fixes it, persist the path either via `pip install -e .` (preferred) or by setting `HERMES_WEBUI_AGENT_DIR` to that directory.
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### When to file a bug
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If after running steps 1-4 the import still fails *and* `pip install -e .` succeeded *and* `PYTHONPATH=... python -c "from run_agent import AIAgent"` succeeds — that's a real WebUI bug. File at https://github.com/nesquena/hermes-webui/issues with:
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- The output of every command in steps 1-4
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- The full diagnostic block printed by the WebUI's `ImportError` (v0.51.6+)
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- Your OS, Python version, and how the agent was installed
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---
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## "Response interrupted." marker keeps saying "no agent output was recovered"
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**Symptom.** After the WebUI process restarts mid-turn (manual restart, OOM, crash, …), the affected chat shows an `**Response interrupted.**` marker with the wording *"The user message above was preserved, but no agent output was recovered."*, even though the run-journal for that turn is present on disk and contains the partial tokens the agent had already streamed.
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**Why.** Sidecar repair re-checks the run-journal at restart and uses the result as a one-shot signal. On WSL2 (9p / DrvFs) and on some network-backed setups, the run-journal `.jsonl` is written by the dead worker but the WebUI process reads it through a page-cache state that has not yet seen those writes — recovery returns "empty" and the marker is baked permanently. The fix introduces a *lazy* retry path: when sidecar repair cannot read visible output but knows the stream id, it stores a `_pending_journal_recovery` flag on the marker and re-attempts recovery from `get_session()` until the journal becomes readable (or the retry budget is exhausted).
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**Diagnostic.**
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The on-disk locations below assume the default `~/.hermes/webui` state directory. If you override it via `HERMES_WEBUI_STATE_DIR`, substitute that path for `~/.hermes/webui` in every step.
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1. Identify the affected session id and stream id from the marker. The marker JSON lives at `~/.hermes/webui/sessions/<sid>.json`; after the fix it shows them on the `_journal_retry_stream_id` key. Pre-fix sessions only carry the legacy wording, with no retry meta.
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2. Check whether the run-journal contains real events:
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```bash
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ls -la ~/.hermes/webui/sessions/_run_journal/<sid>/<stream_id>.jsonl
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head -2 ~/.hermes/webui/sessions/_run_journal/<sid>/<stream_id>.jsonl
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```
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If the file exists and contains `token` / `tool` events, the lazy-retry path will pick them up the next time the session is opened.
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**Fix.** Reload the session in the browser. On the next `get_session()` call the marker is re-evaluated; if the journaled events are visible on disk the marker promotes to *"The partial output above was recovered from the run journal …"* wording and the journaled assistant text + tool cards land above the marker in chronological order. No manual sidecar editing is required.
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**Trigger.** Sidebar metadata polling is intentionally not enough to run this self-heal. Requests such as `/api/session?messages=0&resolve_model=0` load the session with `metadata_only=True`, skip the full messages array, and therefore skip the lazy journal retry helper. Click/open the affected conversation so the message panel performs a full `messages=1` load; that full render is what re-checks the journal and can promote the marker.
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**Caps.** The lazy retry path gives up after 12 failed attempts or 24h of wall-clock age, at which point the marker is demoted to a neutral *"Partial output may have been lost."* wording so the "reload to retry" prompt doesn't linger forever for genuinely lost journals.
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**When to file a bug.** If, after the fix, you see the lazy-retry wording (*"Recovering the partial output from the run journal — reload this session to retry."*) but reloading the session never promotes it to the recovered wording even though the `.jsonl` clearly contains `token` events, capture the marker JSON and the run-journal file and file a bug.
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---
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## Other troubleshooting
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This document grows over time. If a recurring failure mode isn't covered here yet, add it via PR. The format for each entry: **Symptom → Why → Diagnostic commands → Fix → When to file a bug**.
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Related references:
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- [`docs/supervisor.md`](supervisor.md) — process-supervisor setup (launchd, systemd, supervisord, runit/s6) including the bootstrap supervisor-foreground flag.
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- [`docs/docker.md`](docker.md) — Docker compose setup, common failure modes, bind-mount migration.
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- [`docs/wsl-autostart.md`](wsl-autostart.md) — WSL2 auto-start at login on Windows.
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- [`docs/EXTENSIONS.md`](EXTENSIONS.md) — WebUI extension injection, security model, examples.
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