Three clip generations failed while OCR and other work was running, with:

  RuntimeError: the venv at /AI/guffcache/longcat_venv was built but still does
  not report Python 3.10 with torch 2.6 / transformers 4.41

The venv reports exactly that. It holds torch 2.6.0+cu124, transformers 4.41.0,
numpy 1.26.4, on Python 3.10.18 — read from its own dist-info, and the probe
passes when run by hand.

The check imports torch from a 6.2 GB venv. Timed on an IDLE box: 106 seconds,
against a 120 second limit. Under the load that necessarily accompanies a
generation request it expired, TimeoutExpired was caught by a bare `except
Exception: return False`, and the caller turned "I could not finish asking" into
"the answer is no" — then rebuilt, re-probed, and failed again.

Both probes are now tri-state: True verified, False a real mismatch, None could
not be determined. An unverified venv is USED; only a verified-bad one is rebuilt
or rejected. The limit is 900s, and a genuine failure now prints what the probe
actually said instead of asserting versions nobody checked.

Nothing was wrong with the OCR/paddle side, and there were no VRAM, eviction,
swap or queue failures in the window — the 1626 apparent "503"s are those digits
occurring inside OCR'd Italian legal documents in the request debug dumps, and
the 1792 "ERROR"s are mostly the same plus vLLM warnings. The only real
exceptions in two hours were this one and the LongCat training chain.

32 tests.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0182DhR1eFNPQyGmDrpHbedY