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new_owner: a feed state manager for owner (#1826)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,287 @@ | ||
| // Copyright 2021 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package owner | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/log" | ||
| "github.com/pingcap/ticdc/cdc/model" | ||
| cerrors "github.com/pingcap/ticdc/pkg/errors" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| // feedStateManager manages the feedState of a changefeed | ||
| // when the error, admin job happened, the feedStateManager is responsible for controlling the feedState | ||
| type feedStateManager struct { | ||
| state *model.ChangefeedReactorState | ||
| shouldBeRunning bool | ||
|
|
||
| adminJobQueue []*model.AdminJob | ||
| } | ||
|
|
||
| func (m *feedStateManager) Tick(state *model.ChangefeedReactorState) { | ||
| m.state = state | ||
| m.shouldBeRunning = true | ||
| defer func() { | ||
| if m.shouldBeRunning { | ||
| m.patchState(model.StateNormal) | ||
| } else { | ||
| m.cleanUpInfos() | ||
| } | ||
| }() | ||
| if m.state.Status == nil { | ||
| return | ||
| } | ||
| if m.handleAdminJob() { | ||
| // `handleAdminJob` returns true means that some admin jobs are pending | ||
| // skip to the next tick until all the admin jobs is handled | ||
| return | ||
| } | ||
| switch m.state.Info.State { | ||
| case model.StateStopped, model.StateFailed, model.StateRemoved, model.StateFinished: | ||
| m.shouldBeRunning = false | ||
| return | ||
| } | ||
| errs := m.errorsReportedByProcessors() | ||
| m.HandleError(errs...) | ||
| } | ||
|
|
||
| func (m *feedStateManager) ShouldRunning() bool { | ||
| return m.shouldBeRunning | ||
| } | ||
|
|
||
| func (m *feedStateManager) MarkFinished() { | ||
| if m.state == nil { | ||
| // when state is nil, it means that Tick has never been called | ||
| // skip this and wait for the next tick to finish the changefeed | ||
| return | ||
| } | ||
| m.pushAdminJob(&model.AdminJob{ | ||
| CfID: m.state.ID, | ||
| Type: model.AdminFinish, | ||
| }) | ||
| } | ||
|
|
||
| func (m *feedStateManager) PushAdminJob(job *model.AdminJob) { | ||
| switch job.Type { | ||
| case model.AdminStop, model.AdminResume, model.AdminRemove: | ||
| default: | ||
| log.Panic("Can not handle this job", zap.String("changefeedID", m.state.ID), | ||
| zap.String("changefeedState", string(m.state.Info.State)), zap.Any("job", job)) | ||
| } | ||
| m.pushAdminJob(job) | ||
| } | ||
|
|
||
| func (m *feedStateManager) handleAdminJob() (jobsPending bool) { | ||
| job := m.popAdminJob() | ||
| if job == nil || job.CfID != m.state.ID { | ||
| return false | ||
| } | ||
| log.Info("handle admin job", zap.String("changefeedID", m.state.ID), zap.Reflect("job", job)) | ||
| switch job.Type { | ||
| case model.AdminStop: | ||
| switch m.state.Info.State { | ||
| case model.StateNormal, model.StateError: | ||
| default: | ||
| log.Warn("can not pause the changefeed in the current state", zap.String("changefeedID", m.state.ID), | ||
| zap.String("changefeedState", string(m.state.Info.State)), zap.Any("job", job)) | ||
| return | ||
| } | ||
| m.shouldBeRunning = false | ||
| jobsPending = true | ||
| m.patchState(model.StateStopped) | ||
| case model.AdminRemove: | ||
| switch m.state.Info.State { | ||
| case model.StateNormal, model.StateError, model.StateFailed, | ||
| model.StateStopped, model.StateFinished, model.StateRemoved: | ||
| default: | ||
| log.Warn("can not remove the changefeed in the current state", zap.String("changefeedID", m.state.ID), | ||
| zap.String("changefeedState", string(m.state.Info.State)), zap.Any("job", job)) | ||
| return | ||
| } | ||
| m.shouldBeRunning = false | ||
| jobsPending = true | ||
| m.patchState(model.StateRemoved) | ||
| if job.Opts != nil && job.Opts.ForceRemove { | ||
| // remove changefeed info and state | ||
| m.state.PatchInfo(func(info *model.ChangeFeedInfo) (*model.ChangeFeedInfo, bool, error) { | ||
| return nil, true, nil | ||
| }) | ||
| m.state.PatchStatus(func(status *model.ChangeFeedStatus) (*model.ChangeFeedStatus, bool, error) { | ||
| return nil, true, nil | ||
| }) | ||
| } | ||
| case model.AdminResume: | ||
| switch m.state.Info.State { | ||
| case model.StateFailed, model.StateError, model.StateStopped, model.StateFinished: | ||
| default: | ||
| log.Warn("can not resume the changefeed in the current state", zap.String("changefeedID", m.state.ID), | ||
| zap.String("changefeedState", string(m.state.Info.State)), zap.Any("job", job)) | ||
| return | ||
| } | ||
| m.shouldBeRunning = true | ||
| jobsPending = true | ||
| m.patchState(model.StateNormal) | ||
| // remove error history to make sure the changefeed can running in next tick | ||
| m.state.PatchInfo(func(info *model.ChangeFeedInfo) (*model.ChangeFeedInfo, bool, error) { | ||
| if info.Error != nil || len(info.ErrorHis) != 0 { | ||
| info.Error = nil | ||
| info.ErrorHis = nil | ||
| return info, true, nil | ||
| } | ||
| return info, false, nil | ||
| }) | ||
| case model.AdminFinish: | ||
| switch m.state.Info.State { | ||
| case model.StateNormal: | ||
| default: | ||
| log.Warn("can not finish the changefeed in the current state", zap.String("changefeedID", m.state.ID), | ||
| zap.String("changefeedState", string(m.state.Info.State)), zap.Any("job", job)) | ||
| return | ||
| } | ||
| m.shouldBeRunning = false | ||
| jobsPending = true | ||
| m.patchState(model.StateFinished) | ||
| default: | ||
| log.Warn("Unknown admin job", zap.Any("adminJob", job), zap.String("changefeed", m.state.ID)) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (m *feedStateManager) popAdminJob() *model.AdminJob { | ||
| if len(m.adminJobQueue) == 0 { | ||
| return nil | ||
| } | ||
| job := m.adminJobQueue[0] | ||
| m.adminJobQueue = m.adminJobQueue[1:] | ||
| return job | ||
| } | ||
|
|
||
| func (m *feedStateManager) pushAdminJob(job *model.AdminJob) { | ||
| m.adminJobQueue = append(m.adminJobQueue, job) | ||
| } | ||
|
|
||
| func (m *feedStateManager) patchState(feedState model.FeedState) { | ||
| var adminJobType model.AdminJobType | ||
| switch feedState { | ||
| case model.StateNormal: | ||
| adminJobType = model.AdminNone | ||
| case model.StateFinished: | ||
| adminJobType = model.AdminFinish | ||
| case model.StateError, model.StateStopped, model.StateFailed: | ||
| adminJobType = model.AdminStop | ||
| case model.StateRemoved: | ||
| adminJobType = model.AdminRemove | ||
| default: | ||
| log.Panic("Unreachable") | ||
| } | ||
| m.state.PatchStatus(func(status *model.ChangeFeedStatus) (*model.ChangeFeedStatus, bool, error) { | ||
| if status == nil { | ||
| return status, false, nil | ||
| } | ||
| if status.AdminJobType != adminJobType { | ||
| status.AdminJobType = adminJobType | ||
| return status, true, nil | ||
| } | ||
| return status, false, nil | ||
| }) | ||
| m.state.PatchInfo(func(info *model.ChangeFeedInfo) (*model.ChangeFeedInfo, bool, error) { | ||
| changed := false | ||
| if info.State != feedState { | ||
| info.State = feedState | ||
| changed = true | ||
| } | ||
| if info.AdminJobType != adminJobType { | ||
| info.AdminJobType = adminJobType | ||
| changed = true | ||
| } | ||
| return info, changed, nil | ||
| }) | ||
| } | ||
|
|
||
| func (m *feedStateManager) cleanUpInfos() { | ||
| for captureID := range m.state.TaskStatuses { | ||
| m.state.PatchTaskStatus(captureID, func(status *model.TaskStatus) (*model.TaskStatus, bool, error) { | ||
| return nil, status != nil, nil | ||
| }) | ||
| } | ||
| for captureID := range m.state.TaskPositions { | ||
| m.state.PatchTaskPosition(captureID, func(position *model.TaskPosition) (*model.TaskPosition, bool, error) { | ||
| return nil, position != nil, nil | ||
| }) | ||
| } | ||
| for captureID := range m.state.Workloads { | ||
| m.state.PatchTaskWorkload(captureID, func(workload model.TaskWorkload) (model.TaskWorkload, bool, error) { | ||
| return nil, workload != nil, nil | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func (m *feedStateManager) errorsReportedByProcessors() []*model.RunningError { | ||
| var runningErrors map[string]*model.RunningError | ||
| for captureID, position := range m.state.TaskPositions { | ||
| if position.Error != nil { | ||
| if runningErrors == nil { | ||
| runningErrors = make(map[string]*model.RunningError) | ||
| } | ||
| runningErrors[position.Error.Code] = position.Error | ||
| log.Error("processor report an error", zap.String("changefeedID", m.state.ID), zap.String("captureID", captureID), zap.Any("error", position.Error)) | ||
| m.state.PatchTaskPosition(captureID, func(position *model.TaskPosition) (*model.TaskPosition, bool, error) { | ||
| if position == nil { | ||
| return nil, false, nil | ||
| } | ||
| position.Error = nil | ||
| return position, true, nil | ||
| }) | ||
| } | ||
| } | ||
| if runningErrors == nil { | ||
| return nil | ||
| } | ||
| result := make([]*model.RunningError, 0, len(runningErrors)) | ||
| for _, err := range runningErrors { | ||
| result = append(result, err) | ||
| } | ||
| return result | ||
| } | ||
|
|
||
| func (m *feedStateManager) HandleError(errs ...*model.RunningError) { | ||
| m.state.PatchInfo(func(info *model.ChangeFeedInfo) (*model.ChangeFeedInfo, bool, error) { | ||
| for _, err := range errs { | ||
| info.Error = err | ||
| info.ErrorHis = append(info.ErrorHis, time.Now().UnixNano()/1e6) | ||
| } | ||
| needSave := info.CleanUpOutdatedErrorHistory() | ||
| return info, needSave || len(errs) > 0, nil | ||
| }) | ||
| var err *model.RunningError | ||
| if len(errs) > 0 { | ||
| err = errs[len(errs)-1] | ||
| } | ||
| // if one of the error stored by changefeed state(error in the last tick) or the error specified by this function(error in the this tick) | ||
| // is a fast-fail error, the changefeed should be failed | ||
| if m.state.Info.HasFastFailError() || (err != nil && cerrors.ChangefeedFastFailErrorCode(errors.RFCErrorCode(err.Code))) { | ||
| m.shouldBeRunning = false | ||
| m.patchState(model.StateFailed) | ||
| return | ||
| } | ||
| // if the number of errors has reached the error threshold, stop the changefeed | ||
| if m.state.Info.ErrorsReachedThreshold() { | ||
| m.shouldBeRunning = false | ||
| m.patchState(model.StateError) | ||
| return | ||
| } | ||
| } |
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