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transfer_standby_task_executor.go
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transfer_standby_task_executor.go
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// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package task
import (
"context"
"time"
"github.com/uber/cadence/common"
"github.com/uber/cadence/common/log"
"github.com/uber/cadence/common/log/tag"
"github.com/uber/cadence/common/metrics"
"github.com/uber/cadence/common/ndc"
"github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/types"
"github.com/uber/cadence/service/history/config"
"github.com/uber/cadence/service/history/execution"
"github.com/uber/cadence/service/history/shard"
"github.com/uber/cadence/service/worker/archiver"
)
type (
transferStandbyTaskExecutor struct {
*transferTaskExecutorBase
clusterName string
historyResender ndc.HistoryResender
}
)
// NewTransferStandbyTaskExecutor creates a new task executor for standby transfer task
func NewTransferStandbyTaskExecutor(
shard shard.Context,
archiverClient archiver.Client,
executionCache *execution.Cache,
historyResender ndc.HistoryResender,
logger log.Logger,
metricsClient metrics.Client,
clusterName string,
config *config.Config,
) Executor {
return &transferStandbyTaskExecutor{
transferTaskExecutorBase: newTransferTaskExecutorBase(
shard,
archiverClient,
executionCache,
logger,
metricsClient,
config,
),
clusterName: clusterName,
historyResender: historyResender,
}
}
func (t *transferStandbyTaskExecutor) Execute(
taskInfo Info,
shouldProcessTask bool,
) error {
transferTask, ok := taskInfo.(*persistence.TransferTaskInfo)
if !ok {
return errUnexpectedTask
}
if !shouldProcessTask &&
transferTask.TaskType != persistence.TransferTaskTypeCloseExecution {
// guarantee the processing of workflow execution close
return nil
}
ctx, cancel := context.WithTimeout(context.Background(), taskDefaultTimeout)
defer cancel()
switch transferTask.TaskType {
case persistence.TransferTaskTypeActivityTask:
return t.processActivityTask(ctx, transferTask)
case persistence.TransferTaskTypeDecisionTask:
return t.processDecisionTask(ctx, transferTask)
case persistence.TransferTaskTypeCloseExecution:
return t.processCloseExecution(ctx, transferTask)
case persistence.TransferTaskTypeCancelExecution:
return t.processCancelExecution(ctx, transferTask)
case persistence.TransferTaskTypeSignalExecution:
return t.processSignalExecution(ctx, transferTask)
case persistence.TransferTaskTypeStartChildExecution:
return t.processStartChildExecution(ctx, transferTask)
case persistence.TransferTaskTypeRecordWorkflowStarted:
return t.processRecordWorkflowStarted(ctx, transferTask)
case persistence.TransferTaskTypeResetWorkflow:
// no reset needed for standby
// TODO: add error logs
return nil
case persistence.TransferTaskTypeUpsertWorkflowSearchAttributes:
return t.processUpsertWorkflowSearchAttributes(ctx, transferTask)
default:
return errUnknownTransferTask
}
}
func (t *transferStandbyTaskExecutor) processActivityTask(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
activityInfo, ok := mutableState.GetActivityInfo(transferTask.ScheduleID)
if !ok {
return nil, nil
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, activityInfo.Version, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
if activityInfo.StartedID == common.EmptyEventID {
return newPushActivityToMatchingInfo(
activityInfo.ScheduleToStartTimeout,
), nil
}
return nil, nil
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
getStandbyPostActionFn(
transferTask,
t.getCurrentTime,
t.config.StandbyTaskMissingEventsResendDelay(),
t.config.StandbyTaskMissingEventsDiscardDelay(),
t.pushActivity,
t.pushActivity,
),
)
}
func (t *transferStandbyTaskExecutor) processDecisionTask(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
decisionInfo, ok := mutableState.GetDecisionInfo(transferTask.ScheduleID)
if !ok {
return nil, nil
}
executionInfo := mutableState.GetExecutionInfo()
workflowTimeout := executionInfo.WorkflowTimeout
decisionTimeout := common.MinInt32(workflowTimeout, common.MaxTaskTimeout)
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, decisionInfo.Version, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
if decisionInfo.StartedID == common.EmptyEventID {
return newPushDecisionToMatchingInfo(
decisionTimeout,
types.TaskList{Name: transferTask.TaskList},
), nil
}
return nil, nil
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
getStandbyPostActionFn(
transferTask,
t.getCurrentTime,
t.config.StandbyTaskMissingEventsResendDelay(),
t.config.StandbyTaskMissingEventsDiscardDelay(),
t.pushDecision,
t.pushDecision,
),
)
}
func (t *transferStandbyTaskExecutor) processCloseExecution(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := true
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
if mutableState.IsWorkflowExecutionRunning() {
// this can happen if workflow is reset.
return nil, nil
}
completionEvent, err := mutableState.GetCompletionEvent(ctx)
if err != nil {
return nil, err
}
wfCloseTime := completionEvent.GetTimestamp()
executionInfo := mutableState.GetExecutionInfo()
workflowTypeName := executionInfo.WorkflowTypeName
workflowCloseTimestamp := wfCloseTime
workflowCloseStatus := persistence.ToInternalWorkflowExecutionCloseStatus(executionInfo.CloseStatus)
workflowHistoryLength := mutableState.GetNextEventID() - 1
startEvent, err := mutableState.GetStartEvent(ctx)
if err != nil {
return nil, err
}
workflowStartTimestamp := startEvent.GetTimestamp()
workflowExecutionTimestamp := getWorkflowExecutionTimestamp(mutableState, startEvent)
visibilityMemo := getWorkflowMemo(executionInfo.Memo)
searchAttr := executionInfo.SearchAttributes
lastWriteVersion, err := mutableState.GetLastWriteVersion()
if err != nil {
return nil, err
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, lastWriteVersion, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
// DO NOT REPLY TO PARENT
// since event replication should be done by active cluster
return nil, t.recordWorkflowClosed(
ctx,
transferTask.DomainID,
transferTask.WorkflowID,
transferTask.RunID,
workflowTypeName,
workflowStartTimestamp,
workflowExecutionTimestamp.UnixNano(),
workflowCloseTimestamp,
*workflowCloseStatus,
workflowHistoryLength,
transferTask.GetTaskID(),
visibilityMemo,
executionInfo.TaskList,
searchAttr,
)
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
standbyTaskPostActionNoOp,
) // no op post action, since the entire workflow is finished
}
func (t *transferStandbyTaskExecutor) processCancelExecution(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
requestCancelInfo, ok := mutableState.GetRequestCancelInfo(transferTask.ScheduleID)
if !ok {
return nil, nil
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, requestCancelInfo.Version, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
return getHistoryResendInfo(mutableState)
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
getStandbyPostActionFn(
transferTask,
t.getCurrentTime,
t.config.StandbyTaskMissingEventsResendDelay(),
t.config.StandbyTaskMissingEventsDiscardDelay(),
t.fetchHistoryFromRemote,
standbyTransferTaskPostActionTaskDiscarded,
),
)
}
func (t *transferStandbyTaskExecutor) processSignalExecution(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
signalInfo, ok := mutableState.GetSignalInfo(transferTask.ScheduleID)
if !ok {
return nil, nil
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, signalInfo.Version, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
return getHistoryResendInfo(mutableState)
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
getStandbyPostActionFn(
transferTask,
t.getCurrentTime,
t.config.StandbyTaskMissingEventsResendDelay(),
t.config.StandbyTaskMissingEventsDiscardDelay(),
t.fetchHistoryFromRemote,
standbyTransferTaskPostActionTaskDiscarded,
),
)
}
func (t *transferStandbyTaskExecutor) processStartChildExecution(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
actionFn := func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
childWorkflowInfo, ok := mutableState.GetChildExecutionInfo(transferTask.ScheduleID)
if !ok {
return nil, nil
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, childWorkflowInfo.Version, transferTask.Version, transferTask)
if err != nil || !ok {
return nil, err
}
if childWorkflowInfo.StartedID != common.EmptyEventID {
return nil, nil
}
return getHistoryResendInfo(mutableState)
}
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
actionFn,
getStandbyPostActionFn(
transferTask,
t.getCurrentTime,
t.config.StandbyTaskMissingEventsResendDelay(),
t.config.StandbyTaskMissingEventsDiscardDelay(),
t.fetchHistoryFromRemote,
standbyTransferTaskPostActionTaskDiscarded,
),
)
}
func (t *transferStandbyTaskExecutor) processRecordWorkflowStarted(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
return nil, t.processRecordWorkflowStartedOrUpsertHelper(ctx, transferTask, mutableState, true)
},
standbyTaskPostActionNoOp,
)
}
func (t *transferStandbyTaskExecutor) processUpsertWorkflowSearchAttributes(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
) error {
processTaskIfClosed := false
return t.processTransfer(
ctx,
processTaskIfClosed,
transferTask,
func(ctx context.Context, wfContext execution.Context, mutableState execution.MutableState) (interface{}, error) {
return nil, t.processRecordWorkflowStartedOrUpsertHelper(ctx, transferTask, mutableState, false)
},
standbyTaskPostActionNoOp,
)
}
func (t *transferStandbyTaskExecutor) processRecordWorkflowStartedOrUpsertHelper(
ctx context.Context,
transferTask *persistence.TransferTaskInfo,
mutableState execution.MutableState,
isRecordStart bool,
) error {
// verify task version for RecordWorkflowStarted.
// upsert doesn't require verifyTask, because it is just a sync of mutableState.
if isRecordStart {
startVersion, err := mutableState.GetStartVersion()
if err != nil {
return err
}
ok, err := verifyTaskVersion(t.shard, t.logger, transferTask.DomainID, startVersion, transferTask.Version, transferTask)
if err != nil || !ok {
return err
}
}
executionInfo := mutableState.GetExecutionInfo()
workflowTimeout := executionInfo.WorkflowTimeout
wfTypeName := executionInfo.WorkflowTypeName
startEvent, err := mutableState.GetStartEvent(ctx)
if err != nil {
return err
}
startTimestamp := startEvent.GetTimestamp()
executionTimestamp := getWorkflowExecutionTimestamp(mutableState, startEvent)
visibilityMemo := getWorkflowMemo(executionInfo.Memo)
searchAttr := copySearchAttributes(executionInfo.SearchAttributes)
if isRecordStart {
return t.recordWorkflowStarted(
ctx,
transferTask.DomainID,
transferTask.WorkflowID,
transferTask.RunID,
wfTypeName,
startTimestamp,
executionTimestamp.UnixNano(),
workflowTimeout,
transferTask.GetTaskID(),
executionInfo.TaskList,
visibilityMemo,
searchAttr,
)
}
return t.upsertWorkflowExecution(
ctx,
transferTask.DomainID,
transferTask.WorkflowID,
transferTask.RunID,
wfTypeName,
startTimestamp,
executionTimestamp.UnixNano(),
workflowTimeout,
transferTask.GetTaskID(),
executionInfo.TaskList,
visibilityMemo,
searchAttr,
)
}
func (t *transferStandbyTaskExecutor) processTransfer(
ctx context.Context,
processTaskIfClosed bool,
taskInfo Info,
actionFn standbyActionFn,
postActionFn standbyPostActionFn,
) (retError error) {
transferTask := taskInfo.(*persistence.TransferTaskInfo)
wfContext, release, err := t.executionCache.GetOrCreateWorkflowExecutionWithTimeout(
transferTask.DomainID,
getWorkflowExecution(transferTask),
taskGetExecutionContextTimeout,
)
if err != nil {
if err == context.DeadlineExceeded {
return errWorkflowBusy
}
return err
}
defer func() {
if retError == ErrTaskRedispatch {
release(nil)
} else {
release(retError)
}
}()
mutableState, err := loadMutableStateForTransferTask(ctx, wfContext, transferTask, t.metricsClient, t.logger)
if err != nil || mutableState == nil {
return err
}
if !mutableState.IsWorkflowExecutionRunning() && !processTaskIfClosed {
// workflow already finished, no need to process the timer
return nil
}
historyResendInfo, err := actionFn(ctx, wfContext, mutableState)
if err != nil {
return err
}
release(nil)
return postActionFn(ctx, taskInfo, historyResendInfo, t.logger)
}
func (t *transferStandbyTaskExecutor) pushActivity(
ctx context.Context,
task Info,
postActionInfo interface{},
logger log.Logger,
) error {
if postActionInfo == nil {
return nil
}
pushActivityInfo := postActionInfo.(*pushActivityToMatchingInfo)
timeout := common.MinInt32(pushActivityInfo.activityScheduleToStartTimeout, common.MaxTaskTimeout)
return t.transferTaskExecutorBase.pushActivity(
ctx,
task.(*persistence.TransferTaskInfo),
timeout,
)
}
func (t *transferStandbyTaskExecutor) pushDecision(
ctx context.Context,
task Info,
postActionInfo interface{},
logger log.Logger,
) error {
if postActionInfo == nil {
return nil
}
pushDecisionInfo := postActionInfo.(*pushDecisionToMatchingInfo)
timeout := common.MinInt32(pushDecisionInfo.decisionScheduleToStartTimeout, common.MaxTaskTimeout)
return t.transferTaskExecutorBase.pushDecision(
ctx,
task.(*persistence.TransferTaskInfo),
&pushDecisionInfo.tasklist,
timeout,
)
}
func (t *transferStandbyTaskExecutor) fetchHistoryFromRemote(
_ context.Context,
taskInfo Info,
postActionInfo interface{},
log log.Logger,
) error {
if postActionInfo == nil {
return nil
}
transferTask := taskInfo.(*persistence.TransferTaskInfo)
resendInfo := postActionInfo.(*historyResendInfo)
t.metricsClient.IncCounter(metrics.HistoryRereplicationByTransferTaskScope, metrics.CadenceClientRequests)
stopwatch := t.metricsClient.StartTimer(metrics.HistoryRereplicationByTransferTaskScope, metrics.CadenceClientLatency)
defer stopwatch.Stop()
var err error
if resendInfo.lastEventID != nil && resendInfo.lastEventVersion != nil {
// note history resender doesn't take in a context parameter, there's a separate dynamicconfig for
// controlling the timeout for resending history.
err = t.historyResender.SendSingleWorkflowHistory(
transferTask.DomainID,
transferTask.WorkflowID,
transferTask.RunID,
resendInfo.lastEventID,
resendInfo.lastEventVersion,
nil,
nil,
)
} else {
err = &types.InternalServiceError{
Message: "transferQueueStandbyProcessor encounter empty historyResendInfo",
}
}
if err != nil {
t.logger.Error("Error re-replicating history from remote.",
tag.ShardID(t.shard.GetShardID()),
tag.WorkflowDomainID(transferTask.DomainID),
tag.WorkflowID(transferTask.WorkflowID),
tag.WorkflowRunID(transferTask.RunID),
tag.SourceCluster(t.clusterName))
}
// return error so task processing logic will retry
return ErrTaskRedispatch
}
func (t *transferStandbyTaskExecutor) getCurrentTime() time.Time {
return t.shard.GetCurrentTime(t.clusterName)
}