fix(run-engine): retry getSnapshotsSince on the replica then primary when the read replica lags#3889

Merged

d-cs merged 21 commits into

mainfrom

snapshots-since-replica-primary-fallback

Jun 10, 2026

Commits on Jun 10, 2026

feat(testcontainers): schemaOnlyPrisma fixture - empty template clone for replica-lag tests

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test(run-engine): cover getSnapshotsSince replica-miss fallback (red)

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test(run-engine): tie-proof replica fallback window assertion, drop redundant cast

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feat(run-engine): typed ExecutionSnapshotNotFoundError from getExecutionSnapshotsSince

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feat(run-engine): retry getSnapshotsSince on the primary when the replica misses the since snapshot

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fix(run-engine): only count replica misses the primary can serve; skip fallback without a replica

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chore: server-changes note for snapshots-since replica fallback

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test(run-engine): cover replica-read, stale-tail, flag-off, tx bypass and counter semantics for getSnapshotsSince

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fix(run-engine): mark replica-retry failures in logs, narrow release note, trim dead test setup

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test(run-engine): getSnapshotsSince must reject a since snapshot from a different run (red)

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fix(run-engine): scope getSnapshotsSince anchor lookup to the polled run

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chore(run-engine): trim assertion-echo comments, tighten fallback comment

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test(run-engine): replica catches up during jittered retry window (red)

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feat(run-engine): jittered replica retry before primary fallback in getSnapshotsSince

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chore(run-engine): harden retry-window test against cold connects, distinguish fallback failure logs

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chore: unwrap server-changes notes to one line per paragraph

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fix(run-engine,testcontainers): address review - normalize retry bounds, tie-stable test assertions, shared clone/drop helpers

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docs(run-engine): document maxMs <= 0 (not just 0) as disabling the replica retry

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chore: combine the two snapshots-since server-changes notes into one entry

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docs(run-engine): clarify that only not-found replica errors trigger the writer fallback

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chore: retrigger CI

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fix(run-engine): retry getSnapshotsSince on the replica then primary when the read replica lags#3889

fix(run-engine): retry getSnapshotsSince on the replica then primary when the read replica lags#3889
d-cs merged 21 commits into
mainfrom
snapshots-since-replica-primary-fallback

Commits on Jun 10, 2026

feat(testcontainers): schemaOnlyPrisma fixture - empty template clone for replica-lag tests

test(run-engine): cover getSnapshotsSince replica-miss fallback (red)

test(run-engine): tie-proof replica fallback window assertion, drop redundant cast

feat(run-engine): typed ExecutionSnapshotNotFoundError from getExecutionSnapshotsSince

feat(run-engine): retry getSnapshotsSince on the primary when the replica misses the since snapshot

fix(run-engine): only count replica misses the primary can serve; skip fallback without a replica

chore: server-changes note for snapshots-since replica fallback

test(run-engine): cover replica-read, stale-tail, flag-off, tx bypass and counter semantics for getSnapshotsSince

fix(run-engine): mark replica-retry failures in logs, narrow release note, trim dead test setup

test(run-engine): getSnapshotsSince must reject a since snapshot from a different run (red)

fix(run-engine): scope getSnapshotsSince anchor lookup to the polled run

chore(run-engine): trim assertion-echo comments, tighten fallback comment

test(run-engine): replica catches up during jittered retry window (red)

feat(run-engine): jittered replica retry before primary fallback in getSnapshotsSince

chore(run-engine): harden retry-window test against cold connects, distinguish fallback failure logs

chore: unwrap server-changes notes to one line per paragraph

fix(run-engine,testcontainers): address review - normalize retry bounds, tie-stable test assertions, shared clone/drop helpers

docs(run-engine): document maxMs <= 0 (not just 0) as disabling the replica retry

chore: combine the two snapshots-since server-changes notes into one entry

docs(run-engine): clarify that only not-found replica errors trigger the writer fallback

chore: retrigger CI