mirror of
https://gitee.com/milvus-io/milvus.git
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c15b880f0e
Signed-off-by: zhenshan.cao <zhenshan.cao@zilliz.com> Signed-off-by: zhenshan.cao <zhenshan.cao@zilliz.com>
155 lines
4.4 KiB
Go
155 lines
4.4 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package datanode
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import (
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"sync"
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"time"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/datapb"
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"go.uber.org/zap"
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)
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const retryWatchInterval = 20 * time.Second
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type event struct {
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eventType int
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vChanName string
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version int64
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info *datapb.ChannelWatchInfo
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}
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type channelEventManager struct {
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sync.Once
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eventChan chan event
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closeChan chan struct{}
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handlePutEvent func(watchInfo *datapb.ChannelWatchInfo, version int64) error // node.handlePutEvent
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handleDeleteEvent func(vChanName string) // node.handleDeleteEvent
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retryInterval time.Duration
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}
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const (
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putEventType = 1
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deleteEventType = 2
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)
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func newChannelEventManager(handlePut func(*datapb.ChannelWatchInfo, int64) error,
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handleDel func(string), retryInterval time.Duration) *channelEventManager {
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return &channelEventManager{
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eventChan: make(chan event, 10),
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closeChan: make(chan struct{}),
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handlePutEvent: handlePut,
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handleDeleteEvent: handleDel,
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retryInterval: retryInterval,
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}
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}
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func (e *channelEventManager) Run() {
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go func() {
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for {
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select {
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case event := <-e.eventChan:
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switch event.eventType {
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case putEventType:
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e.retryHandlePutEvent(event)
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case deleteEventType:
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e.handleDeleteEvent(event.vChanName)
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}
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case <-e.closeChan:
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return
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}
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}
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}()
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}
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func (e *channelEventManager) retryHandlePutEvent(event event) {
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countdown := time.Until(time.Unix(0, event.info.TimeoutTs))
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if countdown < 0 {
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log.Warn("event already timed out", zap.String("vChanName", event.vChanName))
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return
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}
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// Trigger retry for-loop when fail to handle put event for the first time
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if err := e.handlePutEvent(event.info, event.version); err != nil {
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timer := time.NewTimer(countdown)
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defer timer.Stop()
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ticker := time.NewTicker(e.retryInterval)
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defer ticker.Stop()
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for {
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log.Warn("handle put event fail, starting retry",
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zap.String("vChanName", event.vChanName),
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zap.String("retry interval", e.retryInterval.String()),
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zap.Error(err))
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// reset the ticker
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ticker.Reset(e.retryInterval)
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select {
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case <-ticker.C:
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// ticker notify, do another retry
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case <-timer.C:
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// timeout
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log.Warn("event process timed out", zap.String("vChanName", event.vChanName))
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return
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case evt, ok := <-e.eventChan:
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if !ok {
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log.Warn("event channel closed", zap.String("vChanName", event.vChanName))
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return
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}
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// When got another put event, overwrite current event
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if evt.eventType == putEventType {
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// handles only Uncomplete, ToWatch and ToRelease
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if isEndWatchState(evt.info.State) {
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return
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}
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event = evt
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}
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// When getting a delete event at next retry, exit retry loop
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// When getting a put event, just continue the retry
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if evt.eventType == deleteEventType {
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log.Warn("delete event triggerred, terminating retry.",
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zap.String("vChanName", event.vChanName))
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e.handleDeleteEvent(evt.vChanName)
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return
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}
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}
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err = e.handlePutEvent(event.info, event.version)
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if err == nil {
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log.Info("handle put event successfully", zap.String("vChanName", event.vChanName))
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return
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}
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}
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}
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}
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func (e *channelEventManager) handleEvent(event event) {
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e.eventChan <- event
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}
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func (e *channelEventManager) Close() {
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e.Do(func() {
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close(e.closeChan)
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})
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}
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func isEndWatchState(state datapb.ChannelWatchState) bool {
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return state != datapb.ChannelWatchState_ToWatch && // start watch
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state != datapb.ChannelWatchState_ToRelease && // start release
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state != datapb.ChannelWatchState_Uncomplete // legacy state, equal to ToWatch
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}
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