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Restarting DM validator won't bring the metrics back

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

area/dmIssues or PRs related to DM.Issues or PRs related to DM.

found/gs

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12601 In pingcap/tiflow;

· kennytm opened on Apr 13, 2026

incorrect default CURRENT_TIMESTAMP with redo

area/ticdcIssues or PRs related to TiCDC.Issues or PRs related to TiCDC.

severity/moderate

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12600 In pingcap/tiflow;

· wk989898 opened on Apr 13, 2026

owner: invalid monotonicity assumption on pullerResolvedTs emits false warnings

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#12598 In pingcap/tiflow;

· 3AceShowHand opened on Apr 9, 2026

cmd/kafka-consumer does not tolerate replayed resolved and DDL messages

area/ticdcIssues or PRs related to TiCDC.Issues or PRs related to TiCDC.

severity/moderate

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12595 In pingcap/tiflow;

· wlwilliamx opened on Apr 8, 2026

DM validator needs some alert rules

area/dmIssues or PRs related to DM.Issues or PRs related to DM.

type/featureIssues about a new featureIssues about a new feature

Status: Open.

#12590 In pingcap/tiflow;

· kennytm opened on Apr 3, 2026

disk may full if print too many log

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#12588 In pingcap/tiflow;

· wk989898 opened on Apr 3, 2026

secondsBehindMaster / replication lag spuriously drops to 0 between DML batches

area/dmIssues or PRs related to DM.Issues or PRs related to DM.

contributionThis PR is from a community contributor.This PR is from a community contributor.

first-time-contributorIndicates that the PR was contributed by an external member and is a first-time contributor.Indicates that the PR was contributed by an external member and is a first-time contributor.

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12580 In pingcap/tiflow;

· mengxian-li opened on Apr 1, 2026

sync-diff-inspector carries no version information in -V

area/sync_diffIssues or PRs related to sync_diff_inspector.Issues or PRs related to sync_diff_inspector.

severity/minor

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12567 In pingcap/tiflow;

· kennytm opened on Mar 21, 2026

online-ddl: manual cleanup of gh-ost tables incorrectly triggers ALTER TABLE replay

area/dmIssues or PRs related to DM.Issues or PRs related to DM.

contributionThis PR is from a community contributor.This PR is from a community contributor.

first-time-contributorIndicates that the PR was contributed by an external member and is a first-time contributor.Indicates that the PR was contributed by an external member and is a first-time contributor.

Status: Open.

#12564 In pingcap/tiflow;

· Takashi-kun opened on Mar 19, 2026

sync_diff_inspector checkpoint integration test flakes on resumed chunk selection

component/testUnit tests and integration tests component.Unit tests and integration tests component.

severity/minor

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#12553 In pingcap/tiflow;

· joechenrh opened on Mar 13, 2026

Flaky unit test: TestPreCheckConfig in engine/pkg/externalresource/internal/local

component/testUnit tests and integration tests component.Unit tests and integration tests component.

flaky-testFlaky test failuresFlaky test failures

Status: Open.

Task

#12547 In pingcap/tiflow;

· wuhuizuo opened on Mar 10, 2026

Flaky: engine/executor/dm TestWorker panics on unexpected mock Resume()

component/testUnit tests and integration tests component.Unit tests and integration tests component.

flaky-testFlaky test failuresFlaky test failures

Status: Open.

Task

#12545 In pingcap/tiflow;

· wuhuizuo opened on Mar 10, 2026