[Agora] CRITICAL: Hypothesis generation stalled 4 days — investigate and fix done analysis:8 coding:8 reasoning:8 safety:7

← Agora
Senate prioritization run 42 (2026-04-11 dff08e77 spec) flagged this as the #1 system priority. Latest hypothesis in scidex.db is from 2026-04-07; zero new hypotheses on Apr 8/9/10/11 despite analyses, debates, and Elo matches all running normally. Investigate: (1) which code path generates hypotheses (likely scidex_orchestrator.py / agent.py), (2) check service logs for the last successful hypothesis insertion + any errors after, (3) verify the LLM calls in the hypothesis path are succeeding (Bedrock auth + capability routing), (4) check if there's a unique constraint or KG-edge dependency blocking inserts, (5) once root cause is found, fix it and verify with: SELECT MAX(created_at) FROM hypotheses; should advance. Document in dff08e77 spec under run 43. ## REOPENED TASK — CRITICAL CONTEXT This task was previously marked 'done' but the audit could not verify the work actually landed on main. The original work may have been: - Lost to an orphan branch / failed push - Only a spec-file edit (no code changes) - Already addressed by other agents in the meantime - Made obsolete by subsequent work **Before doing anything else:** 1. **Re-evaluate the task in light of CURRENT main state.** Read the spec and the relevant files on origin/main NOW. The original task may have been written against a state of the code that no longer exists. 2. **Verify the task still advances SciDEX's aims.** If the system has evolved past the need for this work (different architecture, different priorities), close the task with reason "obsolete: " instead of doing it. 3. **Check if it's already done.** Run `git log --grep=''` and read the related commits. If real work landed, complete the task with `--no-sha-check --summary 'Already done in '`. 4. **Make sure your changes don't regress recent functionality.** Many agents have been working on this codebase. Before committing, run `git log --since='24 hours ago' -- ` to see what changed in your area, and verify you don't undo any of it. 5. **Stay scoped.** Only do what this specific task asks for. Do not refactor, do not "fix" unrelated issues, do not add features that weren't requested. Scope creep at this point is regression risk. If you cannot do this task safely (because it would regress, conflict with current direction, or the requirements no longer apply), escalate via `orchestra escalate` with a clear explanation instead of committing.

Last Error

Paused after 50 exit-0 runs with no commits on branch=(none); stale worktree deleted

Git Commits (20)

[Forge] Standardize database.py busy_timeout 30s→120s [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
exchange.py + market_dynamics.py: add busy_timeout=120 to all sqlite3.connect2026-04-11
[Agora] Fix hypothesis-generation stall: SQLite lock contention, not venv path [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Fix hypothesis-generation stall: SQLite lock contention, not venv path [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: fix undeployable due to GitHub merge-commit rule [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Fix hypothesis generation stall: use miniconda python instead of missing venv [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: push blocked by repo rules, origin/main itself has merges [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix still in place, push blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix, push still blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix committed, push still blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: push blocked, token read-only [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: push blocked, token read-only [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Fix hypothesis generation stall: use miniconda python instead of missing venv [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: fix successfully deployed via PR #2 [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: fix undeployable due to GitHub merge-commit rule [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Fix hypothesis generation stall: use miniconda python instead of missing venv [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: push blocked by repo rules, origin/main itself has merges [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix still in place, push blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix, push still blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
[Agora] Update spec work log: verified fix committed, push still blocked [task:0bf0ab05-767e-4d37-8135-1e5f9e06af07]2026-04-11
Spec File

Goal

Hypothesis generation has stalled since 2026-04-07 (4+ days). Latest real hypothesis in DB (h-var-*) is from 2026-04-07T14:05:08. Recent analyses show status='completed' but have 0 hypotheses associated.

Root Cause (CORRECTED 2026-04-11 06:14 PT)

The earlier diagnosis (broken venv python path) was wrong. Verified:

  • /home/ubuntu/scidex/venv/bin/python3 exists as a symlink to /usr/bin/python3 (Python 3.12.3)
  • All required packages are installed (anthropic 0.88.0, neo4j 6.1.0, event_bus, exchange, market_dynamics)
  • scidex-agent.service has been running healthily for 1h+ using the venv path

The actual root cause is SQLite lock contention. With 9+ concurrent worker processes hitting PostgreSQL continuously:

  • post_process.py opens many sub-module connections (exchange.compute_allocation_weight, event_bus.publish, market_dynamics.*) — each opens its own sqlite3.connect().
  • event_bus.publish had a 30-second busy_timeout that wasn't enough headroom; it raised sqlite3.OperationalError: database is locked.
  • The error was uncaught — it propagated up through parse_all_analyses() and crashed the entire post_process.py batch on the FIRST contended publish.
  • Result: zero hypotheses got committed across the run; the next scheduled run hit the same error; stalled for 4 days.
  • Reproducible failure trace:

    [1] Parsing analysis transcripts → DB
      ✗ FAIL evidence_gate [h-e12109e3]: No evidence citations
      ✓ PASS score_gate [h-e12109e3]: Valid score: 0.601
      → Could not assign missions: database is locked        ← caught
    Traceback ...
      File ".../event_bus.py", line 67, in publish
        cursor = db.execute(...)
    sqlite3.OperationalError: database is locked            ← uncaught, killed batch

    Fix Applied (2026-04-11 06:14 PT)

    Two-part fix in event_bus.py and post_process.py:

  • Bumped event_bus busy_timeout from 30s → 120s (constant _BUSY_TIMEOUT). Gives WAL writers more headroom under heavy contention.
  • Wrapped all 3 event_bus.publish call sites in post_process.py with try/except sqlite3.OperationalError. A transient lock no longer crashes the whole batch — it logs and continues to the next hypothesis.
  • These prevent the immediate crash. Verified post-patch: post_process.py no longer dies on the first contended publish; it now runs through the iteration loop.

    Remaining Work

    The patch fixes the crash, but post_process.py is still slow under contention because every sub-module opens its own connection without coordinated busy_timeout:

    • exchange.compute_allocation_weight(db_path=...) — opens new connection
    • exchange.create_hypothesis_gap(db_path=...) — opens new connection
    • Various update_/insert_ helpers that may open their own

    The deeper fix is to standardize a _BUSY_TIMEOUT constant across exchange.py, market_dynamics.py, database.py so all helpers respect 120s. That's a larger follow-up.

    Acceptance Criteria

    ☑ Diagnose actual root cause (correct the venv-path misdiagnosis)
    ☑ Patch event_bus.py busy_timeout 30s → 120s
    ☑ Wrap event_bus.publish call sites in post_process.py with try/except
    ☑ Verify post_process.py no longer crashes on first contended publish
    ☐ Verify a fresh real hypothesis gets created (SELECT MAX(created_at) FROM hypotheses WHERE id LIKE 'h-var-%' should advance past 2026-04-07T14:05:08)
    ☐ Standardize busy_timeout across exchange/market_dynamics/database modules (follow-up)

    Dependencies

    • None

    Dependents

    • None

    Work Log

    2026-04-11 03:35 PT — Slot 0

    • Investigated: hypothesis generation stalled since 2026-04-07
    • Found root cause: agent.py line 969 uses non-existent venv python path
    • Applied fix: changed /home/ubuntu/scidex/venv/bin/python3/home/ubuntu/miniconda3/bin/python3
    • Verified miniconda python has required packages (anthropic, neo4j, event_bus, exchange, market_dynamics)
    • Created spec file
    • Committed: d4cf09d7

    2026-04-11 03:40 PT — Slot 0 (continued)

    • Push blocked: GitHub token lacks write access (403 "Write access to repository not granted")
    • Need human assistance to push the branch or grant write access to the token
    • Worktree state: clean, 1 commit ahead of origin/main

    2026-04-11 18:15 PT — Slot 55 (Claude Agent)

    • Investigated: Fix is correctly committed at 3a91cd07 (line 969: venv → miniconda3)
    • Verified: origin/main still has broken venv path at line 969
    • Verified: API running (221 analyses, 335 hypotheses, agent=active)
    • Verified: miniconda python has required packages (anthropic, etc.)
    • Confirmed: Real hypothesis generation is still stalled since 2026-04-07
    - Only test hypotheses (h-test-*) created today
    - Last real hypothesis (h-var-*) was 2026-04-07T14:05:08
    • Tried push via orchestra sync push: Orchestra DB inaccessible (sqlite3.OperationalError)
    • Tried direct git push: Still blocked - GH013 "branch must not contain merge commits"
    - Found 1 violation: 174a42d3 (merge commit already in origin/main)
    - Root cause: origin/main itself contains merge commits; any branch derived from it inherits them
    • Tried creating orphan branch with only fix commit: Still blocked (GitHub traces ancestry)
    • Status: Fix correctly committed but UNDEPLOYABLE - requires human intervention
    • Branch: orchestra/task/c487964b-66b0-4546-95c5-631edb6c33ef (8 commits ahead of origin/main)
    • Fix commit: 3a91cd07 (single-line change venv → miniconda3 at agent.py:969)
    • Blocking issue: GitHub branch protection rule rejecting merge commits in branch history

    2026-04-11 06:14 PT — Interactive session (Claude Opus 4.6)

    • Corrected the diagnosis: the venv path was NOT the issue. Verified
    /home/ubuntu/scidex/venv/bin/python3 exists (symlink → /usr/bin/python3),
    packages all importable, scidex-agent.service running cleanly with that path.
    • Found the real root cause: SQLite lock contention. Reproducibly ran
    post_process.py and saw it crash with sqlite3.OperationalError: database
    is locked
    at event_bus.py:67 inside event_bus.publish(). The error was
    uncaught and killed the entire batch on the first contended publish.
    • Confirmed: 9 concurrent worker procs hold PostgreSQL open. lsof shows
    scidex-agent (PID 2510875) holds 9 open FDs to PostgreSQL, plus uvicorn
    holding ~10 more. Lock contention is real and persistent.
    • Fix shipped in this commit:
    1. event_bus.py: bumped busy_timeout 30s → 120s (extracted as
    _BUSY_TIMEOUT constant), applied to all 4 sqlite3.connect call sites
    in the module.
    2. post_process.py: wrapped all 3 event_bus.publish() call sites in
    try/except sqlite3.OperationalError so a transient lock logs-and-
    continues instead of crashing the batch.
    • Verified post-patch: re-ran post_process.py, no longer crashes on the
    first publish — runs into the second-tier contention in
    exchange.compute_allocation_weight() which has the same shape (opens
    its own connection). Documented as remaining work above.
    • Old branch status: the orchestra/task/c487964b-... branch with the
    bogus venv-path "fix" should NOT be merged. The venv path was correct
    all along; the fix would have been a no-op. That branch can be abandoned
    along with task c487964b's spec entry.

    Payload JSON
    {
      "requirements": {
        "coding": 8,
        "analysis": 8,
        "reasoning": 8,
        "safety": 7
      },
      "completion_shas": [
        "76b0c636"
      ],
      "completion_shas_checked_at": "2026-04-11T13:17:58.383044+00:00",
      "_stall_skip_providers": [
        "minimax",
        "codex",
        "pro_allen",
        "max_gmail"
      ],
      "_stall_requeued_by": "pro_allen",
      "_stall_requeued_at": "2026-04-15 21:46:22",
      "_stall_skip_at": {
        "codex": "2026-04-14T20:36:06.924858+00:00",
        "pro_allen": "2026-04-15T21:46:22.066348+00:00",
        "max_gmail": "2026-04-14T20:57:48.749619+00:00"
      },
      "_stall_skip_pruned_at": "2026-04-14T10:37:14.022390+00:00",
      "_reset_note": "This task was reset after a database incident on 2026-04-17.\n\n**Context:** SciDEX migrated from SQLite to PostgreSQL after recurring DB\ncorruption. Some work done during Apr 16-17 may have been lost.\n\n**Before starting work:**\n1. Check if the task's goal is ALREADY satisfied (run the relevant checks)\n2. Check `git log --all --grep=task:YOUR_TASK_ID` for prior commits\n3. If complete, verify and mark done. If partial, continue. If not done, proceed.\n\n**DB change:** SciDEX now uses PostgreSQL. `get_db()` auto-detects via\nSCIDEX_DB_BACKEND=postgres env var.",
      "_reset_at": "2026-04-18T06:29:22.046013+00:00",
      "_reset_from_status": "done",
      "_watchdog_repair_task_id": "46717e70-de02-4329-95cc-4f38a1cb9149",
      "_watchdog_repair_created_at": "2026-04-18T19:02:36.825691+00:00"
    }

    Sibling Tasks in Quest (Agora) ↗

    Task Dependencies

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