45 lines
2.9 KiB
Markdown
45 lines
2.9 KiB
Markdown
# [2026-08-04] OmniRoute free-DeepSeek silent stops (empty-after-tool)
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## Status
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Mitigated — combos reworked; upstream still degraded.
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## Symptom
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On **both** Hermes instances (ops/Tusk + the other instance), turns using `deepseek-flash-free` (and `smart-route` via `good-free`) did one tool call, then went **silently** — no text, no error. "continue" → one more tool call → silent stop again.
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## Root cause
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The free-DeepSeek upstreams behind the combos started returning **valid-but-empty HTTP 200s right after a tool_calls turn** (no content, no further tool call). Hermes can't distinguish "empty" from "model chose to stop" → ends turn silently. Began **2026-08-01 ~09:14 UTC**, still active. OmniRoute log markers:
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```
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[STREAM] Empty assistant response after tool_calls completion (<provider>:<model>)
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[ProxyEgress] <provider>/<conn-hash> ... status=error
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```
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Per-model evidence (counts in `storage.sqlite` era log):
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- `238d5978/deepseek-v4-flash` — 63× empty-after-tool (conn `d4b9fee0`, 189 proxy errors)
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- `238d5978/deepseek-v4-flash-0731` — 70× empty-after-tool
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- `eb5af0da/deepseek-v4-flash-thinking:free` (conn `f8169018`) — 504 proxy errors (combo #1 slot)
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- `nvidia` deepseek + `opencode-zen` deepseek-free — noisy, errors
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Strategy trap: both combos used `priority`, which retries the **same** broken connection and never fails over on an empty 200.
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## Change applied (2026-08-04, ~03:30 AWST)
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Edited `combos` in `/var/lib/omniroute/storage.sqlite` on CT600 (live DB, hot-reloads — no restart):
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- **`deepseek-flash-free`** — strategy `priority` → `fill-first`; 8 → 7 models: healthy free first (`mimo-v2.5-free`, `laguna-s-2.1:free` ×2 providers, `step-3.7-flash`, `glm-5.2-cheap:free`), one deepseek (`deepseek-v4-flash-thinking:free`) demoted to last resort.
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- **`good-free`** — strategy `priority` → `fill-first`; 15 → 12 models. **Dropped** the proven culprits: `238d5978/deepseek-v4-flash`, `nvidia/deepseek-ai/deepseek-v4-pro`, `nvidia/deepseek-ai/deepseek-v4-flash`. `opencode/deepseek-v4-flash-free` kept as last resort.
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Backup of both pre-change rows: `/tmp/combo_backup_20260804.json` on the Hermes gateway LXC.
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## Verification
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- Live API (`/v1/combos`) reflects both changes immediately (hot reload).
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- 2-step tool-call round-trip through `deepseek-flash-free` returns proper final content.
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- Direct round-trips (stream + non-stream) through the OLD combo were also healthy — the failure needs the degraded upstream + real session, hence counts not repro.
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## Follow-ups
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- Upstream free-DeepSeek tier still degraded; re-check counts in a few days and restore deepseek-first ordering if it recovers.
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- Consider `auto`+explorationRate for self-tuning if free tier stays flaky.
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- Hermes-side: empty-post-tool turns are nudge/retry/fallback handled, but still end silently once exhausted — possible future improvement: surface "(empty after tool calls)" more visibly.
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## Refs
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- [[systems/omniroute]]
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