fix(dbkit/sqlite): end a commit's lock wait with BeginTx's context by bfs2021 · Pull Request #105 · gopherium/framework

bfs2021 · 2026-10-21T02:21:45Z

Problem

database/sql's Tx.Commit takes no context, and busyConn.BeginTx returned the driver's transaction unchanged. A commit that waited for a lock therefore ran with no span: its wait used the connection's BusyTimeout, not the context given to BeginTx. The issue's measurement was a context that ended at 100ms and a Commit that answered 1.46s later; my reproduction without the fix answered after 20s, once the holder let go, with SQLITE_BUSY.

Fix

Wrap the driver's transaction in a busyTx whose Commit runs under the context BeginTx was given, so the busy handler sees that context's Done channel for the commit's wait.

Rollback stays the driver's, as the issue asks: database/sql rolls back on an ended context, and a rollback that stopped early would put a connection still inside a transaction back in the pool.

Fixes #104

Testing

Added TestACommitEndsItsWaitWithTheContextOfBeginTx: an attached rollback-journal database is held by a reader, the transaction writes to it, and Commit runs under a 100ms context.
RED: with busy.go reverted, the test fails — Commit() answered after 20.018s with SQLITE_BUSY, want one matching context.DeadlineExceeded.
GREEN: with the fix, the test passes in 0.15s within the bound.
go test ./... in dbkit/sqlite: all packages pass (4.6s).
go vet ./... passes; gofmt reports no changes.

The tests ran in a golang:1.27 Linux container because dbkit/sqlite refuses to open a database on Windows by design.

Summary by CodeRabbit

Bug Fixes
- Transaction commits now respect the context and deadline provided when the transaction begins.
- Commits waiting on a database lock now return a context deadline error when the deadline expires.

database/sql's Tx.Commit takes no context, and BeginTx returned the driver's transaction unchanged, so a commit that waited for a lock ran with no span and waited up to BusyTimeout. A context that ended at 100ms answered 20s later, once the reader let go. Wrap the transaction so Commit runs under the context BeginTx was given. Rollback stays the driver's: database/sql rolls back on an ended context, and a rollback that stopped early would return a connection still inside a transaction to the pool. Fixes gopherium#104

coderabbitai · 2026-10-21T02:22:03Z

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dbkit/sqlite/busy.go

📝 Walkthrough

BeginTx now returns a wrapper that retains the transaction context and busy-wait state. Commit uses that context, and a new test checks deadline handling during lock contention.

Changes: Context-aware SQLite commit

Layer / File(s)	Summary
Wrap transactions and validate commit deadline `dbkit/sqlite/busy.go`, `dbkit/sqlite/busy_test.go`	`BeginTx` returns a wrapper that stores the transaction context and connection wait state. `Commit` runs with that context. The test checks that a commit waiting on a lock returns an error matching `context.DeadlineExceeded` within `busyBound`.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: sirlouen

Merge Risk: 🟡 Moderate · up to c22b2

Commits now stop waiting when the transaction's context ends, which is the intended improvement. However, a commit that succeeds just as its deadline expires can be reported as failed. Callers may then retry and duplicate a write. Return success whenever the database commit succeeds before merging.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: using the BeginTx context to end a SQLite commit lock wait.
Linked Issues check		Issue `#104` requires context-aware commit waits and an unwrapped rollback. `busyConn.BeginTx` returns `busyTx` with the `BeginTx` context. `busyTx.Commit` runs the driver commit inside `wait.during(t.c…
Out of Scope Changes check		The reported changes are limited to `dbkit/sqlite/busy.go` and `dbkit/sqlite/busy_test.go`. The production change wraps transactions to stop commit lock waits with the `BeginTx` context. The test cove…

Full details: Linked Issues check

Explanation

Issue #104 requires context-aware commit waits and an unwrapped rollback. busyConn.BeginTx returns busyTx with the BeginTx context. busyTx.Commit runs the driver commit inside wait.during(t.ctx) and applies context-aware error handling. Rollback is not overridden, so the embedded driver rollback remains unchanged. The supplied test summary reports the attached rollback-journal lock scenario and verifies that the commit ends at the transaction context deadline. These changes implement the linked issue's coding requirements.

Full details: Out of Scope Changes check

Explanation

The reported changes are limited to dbkit/sqlite/busy.go and dbkit/sqlite/busy_test.go. The production change wraps transactions to stop commit lock waits with the BeginTx context. The test covers that behavior. No unrelated change is shown.

✨ Finishing Touches: 💡 1

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Actionable comments posted: 1

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Inline comments:
Review comments at @dbkit/sqlite/busy.go:
- Line 194: Update the transaction commit handling around t.Tx.Commit so a
successful driver commit returns nil immediately; only pass a non-nil commit
error through ended with t.ctx, preserving the committed result even if the
context ends afterward.

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dbkit/sqlite/busy.go
dbkit/sqlite/busy_test.go

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bfs2021 · 2026-10-21T02:25:26Z

CI note: the three vulncheck jobs that fail (mailkit, dbkit/postgres, gonsole/auth/postgres) report GO-2026-6809, a Go standard-library crypto/x509 vulnerability, from govulncheck@latest. vulncheck (dbkit/sqlite) passes, and none of those three packages import anything this PR changes.

I reproduced it on the untouched mailkit tree in a golang:1.27.2 container: same GO-2026-6809, fixed in Go 1.27.3. So this is the vulnerability database surfacing after main's last run (2f0e7db shows all checks green), not a regression from this change.

greptile-apps · 2026-10-21T02:25:34Z

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; the previous commit-result issue is fixed.

Summary

SQLite commits now use the context passed to BeginTx while waiting for a lock.

SQLite commits stop waiting when the transaction context ends.

_{Reviews (2) · Last reviewed commit: "fix(dbkit/sqlite): keep a successful com..." · Reviewed by Greptile}

If the context ended after the driver's commit returned nil, ended() turned a committed transaction into a context error, so a caller could retry a write that already took effect. Return nil when the driver commit succeeded; only annotate a failed commit with the context error.

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4 Quality Gates Passed

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bfs2021 · 2026-10-21T02:32:09Z

Applied in cecce11: Commit now returns nil when the driver's commit succeeds, and only annotates a failed commit with the context error. go test ./... in dbkit/sqlite still passes.

The Greptile check is its 4/5 confidence threshold (Base review: Confidence 4/5 — below your required 5/5), not a review failure. The three vulncheck failures remain the standard-library GO-2026-6809 described above.

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fix(dbkit/sqlite): end a commit's lock wait with BeginTx's context - #105

fix(dbkit/sqlite): end a commit's lock wait with BeginTx's context#105
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