Issues

• dm: precheck reports ParseInt overflow for large Cloud SQL replica server IDs

  area/dmtype/bug
  pingcap/tiflow#12870 · Filter by author GMHDBJD opened on Sep 22, 2026
  1

• [DM] Two binlog-filter rules sharing a (schema-pattern, table-pattern) key silently drop one rule; the load error is logged and discarded

  area/dmcontributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-26.3may-affects-26.9severity/criticaltype/bug
  pingcap/tiflow#12866 · Filter by author choudharypankaj opened on Sep 18, 2026
  1

  

• [DM] OpenAPI task read attaches every binlog filter rule of a source to all of its table migrate rules

  area/dmseverity/moderatetype/bug
  pingcap/tiflow#12865 · Filter by author joechenrh opened on Sep 18, 2026
  3

• [DM] Task update does not refresh the rows event decode filter and DDL worker rules, dropping rows of newly added tables

  affects-8.5area/dmseverity/majortype/bug
  pingcap/tiflow#12864 · Filter by author joechenrh opened on Sep 18, 2026
  7

• [DM] SourceWorker shutdown can deadlock with task auto-resume

  area/dmtype/bug
  pingcap/tiflow#12857 · Filter by author joechenrh opened on Sep 17, 2026
  2

• [DM] Compatibility: target privilege precheck fails with a newer TiDB that exposes OPERATE VIEW

  affects-26.3affects-26.9severity/majortype/bug
  pingcap/tiflow#12855 · Filter by author Lily2025 opened on Sep 9, 2026
  2

  

• compliance: add root third-party notices for Go dependencies

  type/enhancement
  pingcap/tiflow#12847 · Filter by author dillon-zheng opened on Sep 4, 2026
  6

• DM 8.5.7 incorrectly decodes MySQL 8.4.7 JSON scalar null as an empty value

  area/dmcontributionfirst-time-contributortype/bug
  pingcap/tiflow#12842 · Filter by author kabileshKabi opened on Aug 31, 2026
  1

  

• DM: SyncerConfig field updates are accepted and persisted but inert until restart (silent config drift)

  pingcap/tiflow#12841 · Filter by author wjhuang2016 opened on Aug 31, 2026

• DM: optimistic shard DDL conflict on single source has no recovery path (unlock-ddl-lock rejects skip-and-wait-for-redirect; force-remove ignored)

  pingcap/tiflow#12840 · Filter by author wjhuang2016 opened on Aug 31, 2026

• DM: concurrent full-mode dump of multiple sources deletes each other's files (shared output dir RemoveAll race)

  pingcap/tiflow#12839 · Filter by author wjhuang2016 opened on Aug 31, 2026

• DM: SplitDDL detaches ALGORITHM= / LOCK= qualifiers from the ALTER they qualify

  area/dmcontributiontype/bug
  pingcap/tiflow#12833 · Filter by author choudharypankaj opened on Aug 25, 2026
  8

  

• sync-diff-inspector: --check-struct-only should not warn 'fail to get the correct size of table'

  contributionfirst-time-contributor
  pingcap/tiflow#12821 · Filter by author meiking opened on Aug 18, 2026
  1

• [DM] Updating a source config does not refresh the bound SourceWorker

  area/dm
  pingcap/tiflow#12817 · Filter by author joechenrh opened on Aug 13, 2026
  1

• [DM] UpdateSubTasks holds the scheduler write lock across blocking worker RPCs

  area/dm
  pingcap/tiflow#12816 · Filter by author joechenrh opened on Aug 13, 2026
  1

• [DM] UpdateSubTasks only checks the first source's stage, so a running subtask's config can be updated

  area/dmseverity/moderatetype/bug
  pingcap/tiflow#12815 · Filter by author joechenrh opened on Aug 13, 2026
  3

• [DM] TransferSource treats a canceled pause-wait as success because terror.Annotatef(nil) returns nil

  area/dm
  pingcap/tiflow#12814 · Filter by author joechenrh opened on Aug 13, 2026
  1

• [DM] Increasing syncer worker-count and resuming panics with index out of range

  affects-8.5area/dmseverity/majortype/bug
  pingcap/tiflow#12813 · Filter by author joechenrh opened on Aug 13, 2026
  8

• TSOs stored in ticdc syncpoint for TiDB destination contain inconsistent data on ticdc restart

  affects-7.5affects-8.1area/ticdccontributionfirst-time-contributorreport/customertype/bug
  pingcap/tiflow#12812 · Filter by author lijiamin-lawrence opened on Aug 13, 2026
  2

• Fix repeatedly failing scheduled CI workflows

  severity/minortype/bug
  pingcap/tiflow#12806 · Filter by author GMHDBJD opened on Aug 11, 2026

• flaky DM integration test: s3_dumpling_lightning fails for special task name

  pingcap/tiflow#12805 · Filter by author joechenrh opened on Aug 11, 2026

• [DM] strict collation compatibility loses MySQL 8.0 utf8mb3 default collation

  area/dmcontributiontype/bug
  pingcap/tiflow#12796 · Filter by author 15767637775 opened on Aug 9, 2026
  

• [DM] Pause/Stop can exceed the graceful timeout while waitAsyncDDL is polling

  area/dmtype/bug
  pingcap/tiflow#12781 · Filter by author GMHDBJD opened on Jul 31, 2026

• Update gRPC dependency on master

  type/enhancement
  pingcap/tiflow#12779 · Filter by author asddongmen opened on Jul 31, 2026
  

• [DM] QueryStatus is blocked by SourceWorker write lock while a subtask operation is pending

  area/dmtype/bug
  pingcap/tiflow#12778 · Filter by author GMHDBJD opened on Jul 31, 2026