{"record":{"id":"b2c66f094ec4b1fd","repo":"vitessio/vitess","slug":"error-v-updating-position","errorCode":null,"errorMessage":"error %v updating position","messagePattern":"error (.+?) updating position","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"go/vt/vttablet/tabletmanager/vreplication/vplayer.go","lineNumber":454,"sourceCode":"\t\t\t_, err := tplan.applyBulkInsertChanges(rowEvent.RowChanges, applyFunc, vp.vr.dbClient.maxBatchSize)\n\t\t\treturn err\n\t\t}\n\t}\n\n\tfor _, change := range rowEvent.RowChanges {\n\t\tif _, err := tplan.applyChange(change, applyFunc); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\treturn nil\n}\n\n// updatePos should get called at a minimum of vreplicationMinimumHeartbeatUpdateInterval.\nfunc (vp *vplayer) updatePos(ctx context.Context, ts int64) (posReached bool, err error) {\n\tupdate := binlogplayer.GenerateUpdatePos(vp.vr.id, vp.pos, time.Now().Unix(), ts, vp.vr.stats.CopyRowCount.Get(), vp.vr.workflowConfig.StoreCompressedGTID)\n\tif _, err := vp.query(ctx, update); err != nil {\n\t\treturn false, fmt.Errorf(\"error %v updating position\", err)\n\t}\n\tvp.numAccumulatedHeartbeats = 0\n\tvp.unsavedEvent = nil\n\tvp.timeLastSaved = time.Now()\n\tvp.vr.stats.SetLastPosition(vp.pos)\n\tposReached = !vp.stopPos.IsZero() && vp.pos.AtLeast(vp.stopPos)\n\tif posReached {\n\t\tlog.Info(fmt.Sprintf(\"Stopped at position: %v\", vp.stopPos))\n\t\tif vp.saveStop {\n\t\t\tif err := vp.vr.setState(binlogdatapb.VReplicationWorkflowState_Stopped, fmt.Sprintf(\"Stopped at position %v\", vp.stopPos)); err != nil {\n\t\t\t\treturn false, err\n\t\t\t}\n\t\t}\n\t}\n\treturn posReached, nil\n}\n\nfunc (vp *vplayer) mustUpdateHeartbeat() bool {","sourceCodeStart":436,"sourceCodeEnd":472,"githubUrl":"https://github.com/vitessio/vitess/blob/01a25a7d176f94613b8d59d799f438380a8760e4/go/vt/vttablet/tabletmanager/vreplication/vplayer.go#L436-L472","documentation":"vplayer failed to persist the replication position via binlogplayer.GenerateUpdatePos — the query that writes the current GTID/position, timestamp, and copy counts into the _vt.vreplication table on the target. If the position update fails, vreplication cannot record progress and will retry events, so it surfaces the underlying error wrapped here.","triggerScenarios":"vp.query(ctx, update) fails inside updatePos (called from applyEvents periodically and applyEvent for position-only events) — e.g. the _vt.vreplication row was deleted, the target DB connection broke, or the UPDATE matched no row.","commonSituations":"Workflow cancelled/removed concurrently while the player is still applying events; target MySQL restart or connection loss; _vt.vreplication table corruption or manual edits to the workflow row; tablet transitioned to another serving state mid-run.","solutions":["Check the wrapped %v error: if it is a connection error, verify target MySQL health and let vreplication retry/restart","Confirm the vreplication workflow row (id = vp.vr.id) still exists in _vt.vreplication on the target; re-create the workflow if it was deleted","Look for concurrent workflow management operations (vtctld cancel/move) that raced the player and re-run the workflow","If persistent, stop the workflow, run a clean restore/restart of the stream, and check _vt.vreplication integrity"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":"if posReached, err := vp.updatePos(ctx, ts); err != nil {\n    if isConnectionError(err) {\n        // vreplication restarts the stream and re-applies from last saved pos\n    } else if strings.Contains(err.Error(), \"updating position\") {\n        // check _vt.vreplication row existence and workflow state\n    }\n}","preventionTips":["Do not manually delete/edit _vt.vreplication rows while a workflow is running","Avoid racing workflow cancel/move operations against an actively replicating stream","Keep target MySQL connections stable; monitor for restarts and connection drops","Alert on _vt.vreplication Message field showing repeated position-update errors"],"tags":["vreplication","position-update","vreplication-table","mysql"],"backgroundTag":"vreplication-position-update-failed","analyzedSha":"01a25a7d176f94613b8d59d799f438380a8760e4","analyzedAt":"2026-09-01T17:28:30.605Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}