pingcap/tiflow

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This repo maintains DM (a data migration platform) and TiCDC (change data capture for TiDB)

Stars: 464
Forks: 313
Open beginner issues: 5
Indexed issues: 742
Avg merge: 4d 7h
Merged PRs (30d): 14

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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742 open issues indexed

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

area/dm contribution type/bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflow#12866 · Opened Sep 18, 2026
[DM] OpenAPI task read attaches every binlog filter rule of a source to all of its table migrate rules Open

area/dm severity/moderate type/bug

Difficulty 3/5 1-2 days Newbie friendliness 70/100

pingcap/tiflow#12865 · 3 comments · Opened Sep 18, 2026
[DM] Task update does not refresh the rows event decode filter and DDL worker rules, dropping rows of newly added tables Open

affects-8.5 area/dm severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12864 · 7 comments · Opened Sep 18, 2026
[DM] SourceWorker shutdown can deadlock with task auto-resume Open

area/dm type/bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

pingcap/tiflow#12857 · 2 comments · Opened Sep 17, 2026
[DM] Compatibility: target privilege precheck fails with a newer TiDB that exposes OPERATE VIEW Open

may-affects-26.3 may-affects-7.5 may-affects-8.1 may-affects-8.5 severity/major type/bug

pingcap/tiflow#12855 · 2 comments · 1 assignee · Opened Sep 9, 2026
compliance: add root third-party notices for Go dependencies Open

type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

pingcap/tiflow#12847 · 6 comments · Opened Sep 4, 2026
DM 8.5.7 incorrectly decodes MySQL 8.4.7 JSON scalar null as an empty value Open

area/dm contribution first-time-contributor type/bug

pingcap/tiflow#12842 · 1 comment · 1 assignee · Opened Aug 31, 2026
DM: SyncerConfig field updates are accepted and persisted but inert until restart (silent config drift) Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

pingcap/tiflow#12841 · Opened 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) Open

Difficulty 4/5 3-5 days Newbie friendliness 62/100

pingcap/tiflow#12840 · Opened Aug 31, 2026
DM: concurrent full-mode dump of multiple sources deletes each other's files (shared output dir RemoveAll race) Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

pingcap/tiflow#12839 · Opened Aug 31, 2026
DM: SplitDDL detaches ALGORITHM= / LOCK= qualifiers from the ALTER they qualify Open

area/dm contribution type/bug

pingcap/tiflow#12833 · 7 comments · 1 assignee · Opened Aug 25, 2026
sync-diff-inspector: --check-struct-only should not warn 'fail to get the correct size of table' Open

contribution first-time-contributor

Difficulty 2/5 Half a day Newbie friendliness 76/100

pingcap/tiflow#12821 · 1 comment · Opened Aug 18, 2026
[DM] Updating a source config does not refresh the bound SourceWorker Open

area/dm

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12817 · 1 comment · Opened Aug 13, 2026
[DM] UpdateSubTasks holds the scheduler write lock across blocking worker RPCs Open

area/dm

Difficulty 4/5 3-5 days Newbie friendliness 55/100

pingcap/tiflow#12816 · 1 comment · Opened Aug 13, 2026
[DM] UpdateSubTasks only checks the first source's stage, so a running subtask's config can be updated Open

area/dm severity/moderate type/bug

Difficulty 3/5 1-2 days Newbie friendliness 70/100

pingcap/tiflow#12815 · 3 comments · Opened Aug 13, 2026
[DM] TransferSource treats a canceled pause-wait as success because terror.Annotatef(nil) returns nil Open

area/dm

Difficulty 3/5 1-2 days Newbie friendliness 70/100

pingcap/tiflow#12814 · 1 comment · Opened Aug 13, 2026
[DM] Increasing syncer worker-count and resuming panics with index out of range Open

affects-8.5 area/dm severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

pingcap/tiflow#12813 · 8 comments · Opened Aug 13, 2026
TSOs stored in ticdc syncpoint for TiDB destination contain inconsistent data on ticdc restart Open

affects-7.5 affects-8.1 area/ticdc contribution first-time-contributor report/customer type/bug

Difficulty 5/5 Over a week Newbie friendliness 38/100

pingcap/tiflow#12812 · 2 comments · Opened Aug 13, 2026
Fix repeatedly failing scheduled CI workflows Open

severity/minor type/bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

pingcap/tiflow#12806 · Opened Aug 11, 2026
flaky DM integration test: s3_dumpling_lightning fails for special task name Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

pingcap/tiflow#12805 · Opened Aug 11, 2026
[DM] strict collation compatibility loses MySQL 8.0 utf8mb3 default collation Open

area/dm contribution type/bug

pingcap/tiflow#12796 · 1 assignee · Opened Aug 9, 2026
[DM] Pause/Stop can exceed the graceful timeout while waitAsyncDDL is polling Open

area/dm type/bug

Difficulty 5/5 Over a week Newbie friendliness 35/100

pingcap/tiflow#12781 · Opened Jul 31, 2026
Update gRPC dependency on master Open

type/enhancement

pingcap/tiflow#12779 · 1 assignee · Opened Jul 31, 2026
[DM] QueryStatus is blocked by SourceWorker write lock while a subtask operation is pending Open

area/dm type/bug

Difficulty 4/5 3-5 days Newbie friendliness 57/100

pingcap/tiflow#12778 · Opened Jul 31, 2026
DM: `DM_fail_to_read_binlog_from_master` fires for a newly created zero-valued metric series Open

area/dm type/bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflow#12774 · Opened Jul 30, 2026
DM: stopped task triggers an inflated binlog gap alert after a worker-instance switch Open

affects-7.5 affects-8.1 affects-8.5 area/dm severity/major type/bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12765 · 2 comments · Opened Jul 24, 2026
TiCDC may rebuild EXCHANGE PARTITION DDL with doubled backticks in partition name, causing ErrConvertDDLToEventTypeFailed Open

area/ticdc type/bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

pingcap/tiflow#12761 · Opened Jul 22, 2026
TiCDC emits DML with a DeleteOnly column after changefeed restart Open

area/ticdc type/bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflow#12760 · Opened Jul 17, 2026
Enhance DM OpenAPI for operational and support workflows Open

area/dm type/feature

Difficulty 5/5 Over a week Newbie friendliness 30/100

pingcap/tiflow#12756 · Opened Jul 10, 2026
DM precheck fails on HeatWave SHOW GRANTS and FLUSH_TABLES privilege Open

area/dm type/feature

Difficulty 4/5 3-5 days Newbie friendliness 55/100

pingcap/tiflow#12751 · 1 comment · Opened Jul 2, 2026
DM: online-DDL cut-over splits a same-name index redefinition as ADD-before-DROP → [ddl:1061] index already exist (ErrCode 44006) Open

area/dm contribution first-time-contributor type/bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12747 · 1 comment · Opened Jun 25, 2026
DM: panic in getColsAndValuesOfIdx when processing DML on table with expression index Open

area/dm contribution

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflow#12739 · 1 comment · Opened Jun 23, 2026
Add support for `ENCRYPTED` and `ENCRYPTION_KEY_ID` in MariaDB Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

pingcap/tiflow#12726 · Opened Jun 17, 2026
DM integration test foreign_key_schema_repair can fail on stale resume-task result Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

pingcap/tiflow#12724 · Opened Jun 16, 2026
cdc changefeed failed with "[CDC:ErrS3StorageAPI]external storage api: operation error S3: DeleteObjects, https response error StatusCode: 400, RequestID: xxx, HostID: xxx, api error MissingContentMD5: Missing required header for this request" Open

area/ticdc type/bug

Difficulty 4/5 3-5 days Newbie friendliness 50/100

pingcap/tiflow#12714 · 4 comments · Opened Jun 15, 2026
Use of legacy godebug option: tlsrsakex Open

severity/minor type/bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

pingcap/tiflow#12691 · 4 comments · Opened Jun 9, 2026
Replace pingcap/check with testify Open

type/feature

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12689 · 1 comment · Opened Jun 9, 2026
dm: data race when reusing WhereHandle across DML workers Open

area/dm flaky-test severity/minor type/bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12688 · Opened Jun 9, 2026
sync-diff-inspector falls back to random splitter for TiDB clustered primary key tables because PRIMARY buckets are not found, causing extremely large chunks Open

area/ticdc contribution first-time-contributor type/bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12684 · 2 comments · Opened Jun 8, 2026
TiCDC changefeeds can fail when safepoint loader gets stuck after PD member rotation Open

affects-8.5 area/ticdc report/customer type/bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

pingcap/tiflow#12671 · Opened Jun 4, 2026
Vulnerable dependencies Open

affects-7.1 affects-7.5 affects-8.1 affects-8.5 area/dm severity/major type/bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

pingcap/tiflow#12637 · 3 comments · Opened May 15, 2026
TiCDC Avro Protocol Supports "Before" State Open

contribution type/feature

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12631 · 1 comment · Opened May 8, 2026
Tagged GTIDs Open

severity/minor type/bug

pingcap/tiflow#12629 · 2 comments · 1 assignee · Opened May 7, 2026
[DM] checkpoint may be flushed after downstream BeginTx failure and skip unapplied DML on resume Open

area/dm bug-from-internal-test may-affects-7.1 may-affects-7.5 may-affects-8.1 may-affects-8.5 severity/major subject/correctness type/bug

Difficulty 3/5 1-2 days Newbie friendliness 67/100

pingcap/tiflow#12626 · 1 comment · 1 reaction · Opened Apr 28, 2026
misuse of metabuild.NewContext() when create TableInfo Open

area/dm area/ticdc type/bug

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

pingcap/tiflow#12608 · 1 comment · Opened Apr 16, 2026
tests(ticdc): mq protocol framework relies on git root for compose paths Open

area/ticdc severity/minor type/bug

pingcap/tiflow#12606 · 1 assignee · Opened Apr 15, 2026
Restarting DM validator won't bring the metrics back Open

affects-8.5 area/dm found/gs severity/moderate type/bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

pingcap/tiflow#12601 · 1 comment · Opened Apr 13, 2026
owner: invalid monotonicity assumption on pullerResolvedTs emits false warnings Open

type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

pingcap/tiflow#12598 · Opened Apr 9, 2026
DM validator needs some alert rules Open

area/dm type/feature

Difficulty 2/5 Half a day Newbie friendliness 74/100

pingcap/tiflow#12590 · Opened Apr 3, 2026
disk may full if print too many log Open

type/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

pingcap/tiflow#12588 · 1 comment · Opened Apr 3, 2026

pingcap/tiflow

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