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5 commits
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a8736a07d0
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fix(lbug): checkpoint race in pool-adapter.ts + pin @ladybugdb/core to 0.18.3 (#3189)
* fix(lbug): await evict-then-reopen so it can't race the checkpoint
closeOne() closed the evicted repo's shared Database with a
fire-and-forget `db.close().catch(() => {})` (no await). Both call
sites that evict-then-reopen — evictLRU() right before doInitLbug
opens the new connection, and the "idle & changed" path in initLbug —
proceeded to open the next repo's connection immediately after,
without waiting for the evicted repo's close (and the checkpoint it
triggers) to finish. On the real engine the new open can then collide
with that still-in-flight checkpoint, surfacing on any read as:
Runtime exception: Cannot open database in read-only mode while
checkpoint is in progress. Please retry later.
This reproduces reliably once more than MAX_POOL_SIZE (5) distinct
repos are queried within a short window (self-hosted deployments with
more than a handful of active repos hit it routinely), and gets worse
under genuinely concurrent requests for different repos, since nothing
serialized pool mutations across callers either.
Fix:
- closeOne / evictLRU are now async and await their internal work
(closeOne's own close() call; evictLRU's call to closeOne), closing
the race within a single initLbug call.
- The exported initLbug is wrapped in a small async mutex
(initLbugInner does the real work) so concurrent initLbug calls for
different repos serialize instead of each racing their own
evict-then-reopen against the others.
- closeLbug's two closeOne() calls are now awaited too — closeOne
becoming async meant closeLbug could resolve before pool.delete()
had actually run, which a repo-pinning test caught (isLbugReady()
briefly still true right after a resolved closeLbug()).
- closeOne now deletes the pool entry (and clears its pin, and
notifies pool-close listeners) BEFORE the awaited db.close(), not
after. Review caught that the previous order left a "zombie" entry
reachable via pool.get(repoId) — closed=true, available emptied, but
still present — for the duration of that await; a same-repo
query/init landing in that window would see isLbugReady() as true
and hit a "Connection pool integrity error" in checkout() instead of
just reopening. Deleting first removes the entry entirely, so a
concurrent caller takes the normal fresh-open path instead.
Verified two ways:
- Against the compiled bundle (`ghcr.io/abhigyanpatwari/gitnexus`,
1.6.10/1.6.11 — pool-adapter.js is byte-identical between them): an
A/B docker build with 7 tiny local repos and genuinely concurrent
(parallel, not sequential) /api/graph requests goes from 7/7 failing
to 7/7 succeeding on a freshly-analyzed pool.
- Unit tests here (mocks @ladybugdb/core the same way as
lbug-pool-pinning.test.ts): one asserts the evicted repo's close()
completes before the initLbug call that triggered the eviction
settles; another asserts closeLbug's own promise doesn't resolve
before the underlying close() does. Both gate their mock's close()
on a real short delay and were confirmed to fail against code that
drops the corresponding await.
Note: a second, deeper issue was also observed in the docker A/B
setup — repeated rounds of concurrent access show a repo that has
gone through one evict+reopen cycle can become permanently unable to
reopen for reads, identically with and without this fix. That did not
reproduce with mocks and isn't understood yet; filed separately as
#3186, which stays open and untouched by this PR — this fix closes a
real, root-caused bug on its own but does not resolve #3186 by itself.
Second review round caught a follow-up: the idle-timeout sweep calls
closeOne(repoId) directly, outside of initLbug's poolLock. Now that
closeOne deletes the pool entry before its awaited close(), an
unsynchronized idle close racing a same-repo initLbug could let that
initLbug treat the repo as absent while the idle close (and its
checkpoint) is still in flight — reopening the same class of race this
PR exists to close, just via the idle path instead of LRU eviction.
Routed the idle sweep's closeOne call through withPoolLock too, so it
serializes against initLbug the same way evictLRU already does.
(Tried to add a mocked regression test for this specific interleaving;
dropped it — the mock's dbCache-reuse path masks the difference
regardless of the fix, so it could not be made to discriminate
reliably. Fixed by direct code review instead, same as the note below
already does for the native-engine-specific checkpoint collision.)
Also removed the initLbugInner per-repoId initPromises dedup map: with
every initLbug call now serialized through poolLock, a second call for
a repoId already being initialized cannot observe a pending promise in
initPromises (the first call always fully completes, including its
finally-block cleanup, before the lock releases) — the branch was dead
code the bot correctly flagged twice.
Third review round caught two more follow-ups on the same theme (both
introduced by making the idle sweep route through poolLock):
- closeLbug()'s no-arg ("close everything") branch still calls closeOne
directly in a loop over a snapshotted pool.keys(), without the lock —
an initLbug racing that loop could register a fresh entry the
snapshot never saw, leaving it resident after a call meant to empty
the pool. Wrapped the snapshot+loop in withPoolLock.
- The idle timer callback can now sit queued behind an in-progress
initLbug before its turn arrives, and that init (or a concurrent
touchRepo()) can refresh lastUsed in the meantime — so the pre-lock
idleness check taken when the timer fired can be stale by the time
it actually runs. Re-check lastUsed/checkedOut again inside the lock,
right before closing, instead of trusting the outer snapshot.
* fix(deps): pin @ladybugdb/core back to 0.18.3
Bisected the "checkpoint is in progress" symptom (root cause #2, not
touched by the pool-adapter.ts fix in the previous commit) down to a
single dependency-version-bump commit with zero application code
changes:
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cdbdf219dc
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fix(lbug): reclaim missing-shadow WAL quarantine files on write-path init (#2638)
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7d500390b9
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fix: Use Ladybug native read-only enforcement and prepared statement execution for Cypher query paths (#1655)
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a26ac55fb0
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fix(lbug): Recover gitnexus analyze from orphan LadybugDB sidecars when main DB file is missing (#1622)
* Initial plan * fix: recover from orphan lbug sidecars on init Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/6e8ea6e8-f9ab-46ff-9c1b-4d2c73a6452c * test: strengthen orphan sidecar recovery coverage Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/6e8ea6e8-f9ab-46ff-9c1b-4d2c73a6452c * fix(lbug): only clean orphan sidecars when DB is missing Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * test(lbug): cover no-cleanup path when db file exists Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * test(lbug): use errno-shaped ENOENT mocks for sidecar recovery Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * test(lbug): cover partial sidecar and unlink-failure recovery cases Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * refactor(lbug): tighten ENOENT detection and test naming Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * test(lbug): normalize errno mock helpers across sidecar tests Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a34217b5-0e98-4949-bae1-2a50933f291e * docs(lbug): annotate orphan `.wal.checkpoint` cleanup provenance Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/7edf5156-43e0-412d-87a4-bf4b2934deac * test(lbug): clarify unlink-failure path test intent Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/7edf5156-43e0-412d-87a4-bf4b2934deac * fix(lbug): handle orphan-sidecar cleanup error paths explicitly Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/93294b2c-57f6-459c-8eb2-86e3b8920fb0 * refactor(lbug): extract errno and error-summary helpers Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/93294b2c-57f6-459c-8eb2-86e3b8920fb0 * test(lbug): expand non-ENOENT lstat coverage and remove magic number Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/93294b2c-57f6-459c-8eb2-86e3b8920fb0 * test(lbug): add native integration test for orphan sidecar recovery Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/2dd28264-4604-430a-a249-af52afd29245 Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * test(lbug): annotate best-effort catch in integration test cleanup Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/2dd28264-4604-430a-a249-af52afd29245 Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * chore(autofix): apply prettier + eslint fixes via /autofix command * fix(lbug): add cross-process init lock for orphan sidecar cleanup with integration tests Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/e4cbcfec-a252-449d-8d65-2f3570a253f8 Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * refactor(lbug): use INIT_LOCK_STALE_MS in stale lock detection and address review feedback Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/e4cbcfec-a252-449d-8d65-2f3570a253f8 Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * style(lbug): fix Prettier line-length violation in acquireInitLock fs.open call Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/a140b567-0e9b-4ec9-a158-9fe6b8685ec2 Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * fix(lbug): ensure parent directory exists before creating init lock file acquireInitLock tried to create `${dbPath}.init.lock` using O_CREAT | O_EXCL, but on a fresh repo the parent directory (`.gitnexus/`) doesn't exist yet — the mkdir call was inside the locked section. This caused ENOENT failures on all platforms (Windows, macOS, Ubuntu) during `gitnexus analyze`. Move mkdir to before the lock file creation attempt. Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/6883dc3c-36eb-4907-bcd8-61d23e2c641a Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> * test(lbug): verify acquireInitLock succeeds when parent directory does not exist Adds an integration test proving the fix from the previous commit: acquireInitLock now creates the parent directory before attempting to create the lock file, preventing ENOENT on fresh repos. Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/6883dc3c-36eb-4907-bcd8-61d23e2c641a Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: Gergő Magyar <gergomagyar@icloud.com> Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> |
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0daae93701
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fix(lbug): drain checkpoint result before close (#1506)
* fix(lbug): drain checkpoint result before close * test(lbug): cover checkpoint drain lifecycle * fix(lbug): close query results after reads * fix(lbug): close all stream query results * fix(lbug): harden query result cleanup --------- Co-authored-by: Gergő Magyar <gergomagyar@icloud.com> |