{"record":{"id":"b42c9e6a0b033ba5","repo":"vitessio/vitess","slug":"failed-to-successfully-refresh-all-tablets-in-the-b42c9e","errorCode":null,"errorMessage":"failed to successfully refresh all tablets in the %s/%s target shard (%v):\n  %v","messagePattern":"failed to successfully refresh all tablets in the (.+?)/(.+?) target shard \\((.+?)\\):\n  (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"go/vt/vtctl/workflow/traffic_switcher.go","lineNumber":528,"sourceCode":"\t\t\treturn si.UpdateDeniedTables(ctx, topo.UpdateDeniedTablesOpts{\n\t\t\t\tRemove:     true,\n\t\t\t\tTables:     ts.Tables(),\n\t\t\t\tTabletType: topodatapb.TabletType_PRIMARY,\n\t\t\t})\n\t\t}); err != nil {\n\t\t\treturn err\n\t\t}\n\t\trtbsCtx, cancel := context.WithTimeout(ctx, shardTabletRefreshTimeout)\n\t\tdefer cancel()\n\t\tisPartial, partialDetails, err := topotools.RefreshTabletsByShard(rtbsCtx, ts.TopoServer(), ts.TabletManagerClient(), target.GetShard(), nil, ts.Logger())\n\t\tif isPartial {\n\t\t\tmsg := fmt.Sprintf(\"failed to successfully refresh all tablets in the %s/%s target shard (%v):\\n  %v\",\n\t\t\t\ttarget.GetShard().Keyspace(), target.GetShard().ShardName(), err, partialDetails)\n\t\t\tif ts.force {\n\t\t\t\tlog.Warn(msg)\n\t\t\t\treturn nil\n\t\t\t} else {\n\t\t\t\treturn errors.New(msg)\n\t\t\t}\n\t\t}\n\t\treturn err\n\t})\n}\n\nfunc (ts *trafficSwitcher) validateWorkflowHasCompleted(ctx context.Context) error {\n\treturn doValidateWorkflowHasCompleted(ctx, ts)\n}\n\nfunc (ts *trafficSwitcher) dropParticipatingTablesFromKeyspace(ctx context.Context, keyspace string) error {\n\tvschema, err := ts.TopoServer().GetVSchema(ctx, keyspace)\n\tif err != nil {\n\t\treturn err\n\t}\n\t// VReplication does NOT create the vschema entries in SHARDED\n\t// TARGET keyspaces -- as we cannot know the proper vindex\n\t// definitions to use -- and we should not delete them either","sourceCodeStart":510,"sourceCodeEnd":546,"githubUrl":"https://github.com/vitessio/vitess/blob/01a25a7d176f94613b8d59d799f438380a8760e4/go/vt/vtctl/workflow/traffic_switcher.go#L510-L546","documentation":"Same refresh guard as the source side, but applied to the target shard: if any target tablet fails to refresh after the traffic switch, this error reports the keyspace, shard, error and partial details. When ts.force is set, the failure is downgraded to a warning log and the switch succeeds; otherwise it aborts.","triggerScenarios":"SwitchReads/SwitchWrites where one or more tablets in the target shard (target.GetShard()) fail the refresh step, with partialDetails naming the failed tablets.","commonSituations":"Target tablet down or unreachable during cutover, throttling, or a vttablet restart colliding with the traffic switch window.","solutions":["Restore the failing target tablets (restart, fix networking) and re-run the traffic switch.","Retry the switch once the shard is healthy; only use force if partial refresh is tolerable.","Inspect vttablet logs on the named target tablets for the root-cause refresh error."],"exampleFix":"// before\nreturn errors.New(msg) // target refresh failure aborts switch\n// after\nvtctldclient SwitchWrites --force commerce.sales // proceeds, logs warning instead","handlingStrategy":"retry","validationCode":"for _, t := range targetShardTablets {\n    if !tabletHealthy(ctx, t) { return fmt.Errorf(\"tablet %s unhealthy before switch\", t) }\n}","typeGuard":null,"tryCatchPattern":"err := switchTraffic(ctx, ks, wf)\nif isTabletRefreshErr(err) && isRetryable(err) {\n    err = retry.Do(ctx, 3, func() error { return switchTraffic(ctx, ks, wf) })\n}","preventionTips":["Confirm target shard health before switching writes","Avoid cutover during vttablet restarts or throttling windows","Retry the switch after fixing failed tablets rather than forcing immediately"],"tags":["vitess","traffic-switch","tablet-refresh","target-shard"],"backgroundTag":"tablet-refresh-failed","analyzedSha":"01a25a7d176f94613b8d59d799f438380a8760e4","analyzedAt":"2026-09-01T17:28:30.605Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}