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Within doArchive there is a service goroutine that performs the archiving function. This goroutine reports its error using a `chan error` called `done`. Prior to this PR this channel had 0 capacity meaning that the goroutine would block until the `done` channel was cleared - however there are a couple of ways in which this channel might not be read. The simplest solution is to add a single space of capacity to the goroutine which will mean that the goroutine will always complete and even if the `done` channel is not read it will be simply garbage collected away. (The PR also contains two other places when setting up the indexers which do not leak but where the blocking of the sending goroutine is also unnecessary and so we should just add a small amount of capacity and let the sending goroutine complete as soon as it can.) Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de>
413 lines
11 KiB
Go
413 lines
11 KiB
Go
// Copyright 2018 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package issues
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import (
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"context"
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"fmt"
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"os"
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"runtime/pprof"
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"sync"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/models/db"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/queue"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/util"
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)
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// IndexerData data stored in the issue indexer
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type IndexerData struct {
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ID int64 `json:"id"`
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RepoID int64 `json:"repo_id"`
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Title string `json:"title"`
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Content string `json:"content"`
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Comments []string `json:"comments"`
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IsDelete bool `json:"is_delete"`
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IDs []int64 `json:"ids"`
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}
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// Match represents on search result
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type Match struct {
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ID int64 `json:"id"`
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Score float64 `json:"score"`
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}
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// SearchResult represents search results
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type SearchResult struct {
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Total int64
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Hits []Match
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}
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// Indexer defines an interface to indexer issues contents
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type Indexer interface {
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Init() (bool, error)
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Ping() bool
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SetAvailabilityChangeCallback(callback func(bool))
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Index(issue []*IndexerData) error
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Delete(ids ...int64) error
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Search(ctx context.Context, kw string, repoIDs []int64, limit, start int) (*SearchResult, error)
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Close()
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}
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type indexerHolder struct {
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indexer Indexer
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mutex sync.RWMutex
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cond *sync.Cond
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cancelled bool
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}
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func newIndexerHolder() *indexerHolder {
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h := &indexerHolder{}
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h.cond = sync.NewCond(h.mutex.RLocker())
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return h
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}
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func (h *indexerHolder) cancel() {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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h.cancelled = true
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h.cond.Broadcast()
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}
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func (h *indexerHolder) set(indexer Indexer) {
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h.mutex.Lock()
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defer h.mutex.Unlock()
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h.indexer = indexer
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h.cond.Broadcast()
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}
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func (h *indexerHolder) get() Indexer {
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h.mutex.RLock()
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defer h.mutex.RUnlock()
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if h.indexer == nil && !h.cancelled {
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h.cond.Wait()
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}
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return h.indexer
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}
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var (
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// issueIndexerQueue queue of issue ids to be updated
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issueIndexerQueue queue.Queue
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holder = newIndexerHolder()
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)
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// InitIssueIndexer initialize issue indexer, syncReindex is true then reindex until
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// all issue index done.
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func InitIssueIndexer(syncReindex bool) {
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ctx, _, finished := process.GetManager().AddTypedContext(context.Background(), "Service: IssueIndexer", process.SystemProcessType, false)
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waitChannel := make(chan time.Duration, 1)
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// Create the Queue
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switch setting.Indexer.IssueType {
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case "bleve", "elasticsearch":
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handler := func(data ...queue.Data) []queue.Data {
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indexer := holder.get()
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if indexer == nil {
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log.Error("Issue indexer handler: unable to get indexer!")
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return data
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}
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iData := make([]*IndexerData, 0, len(data))
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unhandled := make([]queue.Data, 0, len(data))
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for _, datum := range data {
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indexerData, ok := datum.(*IndexerData)
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if !ok {
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log.Error("Unable to process provided datum: %v - not possible to cast to IndexerData", datum)
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continue
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}
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log.Trace("IndexerData Process: %d %v %t", indexerData.ID, indexerData.IDs, indexerData.IsDelete)
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if indexerData.IsDelete {
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if err := indexer.Delete(indexerData.IDs...); err != nil {
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log.Error("Error whilst deleting from index: %v Error: %v", indexerData.IDs, err)
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if indexer.Ping() {
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continue
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}
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// Add back to queue
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unhandled = append(unhandled, datum)
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}
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continue
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}
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iData = append(iData, indexerData)
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}
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if len(unhandled) > 0 {
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for _, indexerData := range iData {
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unhandled = append(unhandled, indexerData)
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}
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return unhandled
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}
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if err := indexer.Index(iData); err != nil {
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log.Error("Error whilst indexing: %v Error: %v", iData, err)
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if indexer.Ping() {
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return nil
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}
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// Add back to queue
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for _, indexerData := range iData {
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unhandled = append(unhandled, indexerData)
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}
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return unhandled
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}
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return nil
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}
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issueIndexerQueue = queue.CreateQueue("issue_indexer", handler, &IndexerData{})
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if issueIndexerQueue == nil {
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log.Fatal("Unable to create issue indexer queue")
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}
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default:
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issueIndexerQueue = &queue.DummyQueue{}
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}
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// Create the Indexer
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go func() {
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pprof.SetGoroutineLabels(ctx)
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start := time.Now()
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log.Info("PID %d: Initializing Issue Indexer: %s", os.Getpid(), setting.Indexer.IssueType)
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var populate bool
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switch setting.Indexer.IssueType {
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case "bleve":
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defer func() {
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if err := recover(); err != nil {
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log.Error("PANIC whilst initializing issue indexer: %v\nStacktrace: %s", err, log.Stack(2))
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log.Error("The indexer files are likely corrupted and may need to be deleted")
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log.Error("You can completely remove the %q directory to make Gitea recreate the indexes", setting.Indexer.IssuePath)
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holder.cancel()
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log.Fatal("PID: %d Unable to initialize the Bleve Issue Indexer at path: %s Error: %v", os.Getpid(), setting.Indexer.IssuePath, err)
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}
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}()
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issueIndexer := NewBleveIndexer(setting.Indexer.IssuePath)
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exist, err := issueIndexer.Init()
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if err != nil {
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holder.cancel()
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log.Fatal("Unable to initialize Bleve Issue Indexer at path: %s Error: %v", setting.Indexer.IssuePath, err)
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}
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populate = !exist
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holder.set(issueIndexer)
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graceful.GetManager().RunAtTerminate(func() {
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log.Debug("Closing issue indexer")
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issueIndexer := holder.get()
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if issueIndexer != nil {
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issueIndexer.Close()
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}
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finished()
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log.Info("PID: %d Issue Indexer closed", os.Getpid())
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})
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log.Debug("Created Bleve Indexer")
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case "elasticsearch":
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graceful.GetManager().RunWithShutdownFns(func(_, atTerminate func(func())) {
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pprof.SetGoroutineLabels(ctx)
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issueIndexer, err := NewElasticSearchIndexer(setting.Indexer.IssueConnStr, setting.Indexer.IssueIndexerName)
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if err != nil {
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log.Fatal("Unable to initialize Elastic Search Issue Indexer at connection: %s Error: %v", setting.Indexer.IssueConnStr, err)
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}
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exist, err := issueIndexer.Init()
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if err != nil {
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log.Fatal("Unable to issueIndexer.Init with connection %s Error: %v", setting.Indexer.IssueConnStr, err)
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}
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populate = !exist
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holder.set(issueIndexer)
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atTerminate(finished)
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})
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case "db":
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issueIndexer := &DBIndexer{}
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holder.set(issueIndexer)
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graceful.GetManager().RunAtTerminate(finished)
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default:
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holder.cancel()
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log.Fatal("Unknown issue indexer type: %s", setting.Indexer.IssueType)
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}
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if queue, ok := issueIndexerQueue.(queue.Pausable); ok {
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holder.get().SetAvailabilityChangeCallback(func(available bool) {
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if !available {
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log.Info("Issue index queue paused")
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queue.Pause()
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} else {
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log.Info("Issue index queue resumed")
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queue.Resume()
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}
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})
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}
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// Start processing the queue
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go graceful.GetManager().RunWithShutdownFns(issueIndexerQueue.Run)
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// Populate the index
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if populate {
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if syncReindex {
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graceful.GetManager().RunWithShutdownContext(populateIssueIndexer)
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} else {
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go graceful.GetManager().RunWithShutdownContext(populateIssueIndexer)
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}
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}
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waitChannel <- time.Since(start)
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close(waitChannel)
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}()
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if syncReindex {
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select {
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case <-waitChannel:
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case <-graceful.GetManager().IsShutdown():
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}
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} else if setting.Indexer.StartupTimeout > 0 {
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go func() {
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pprof.SetGoroutineLabels(ctx)
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timeout := setting.Indexer.StartupTimeout
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if graceful.GetManager().IsChild() && setting.GracefulHammerTime > 0 {
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timeout += setting.GracefulHammerTime
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}
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select {
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case duration := <-waitChannel:
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log.Info("Issue Indexer Initialization took %v", duration)
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case <-graceful.GetManager().IsShutdown():
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log.Warn("Shutdown occurred before issue index initialisation was complete")
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case <-time.After(timeout):
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if shutdownable, ok := issueIndexerQueue.(queue.Shutdownable); ok {
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shutdownable.Terminate()
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}
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log.Fatal("Issue Indexer Initialization timed-out after: %v", timeout)
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}
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}()
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}
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}
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// populateIssueIndexer populate the issue indexer with issue data
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func populateIssueIndexer(ctx context.Context) {
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ctx, _, finished := process.GetManager().AddTypedContext(ctx, "Service: PopulateIssueIndexer", process.SystemProcessType, true)
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defer finished()
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for page := 1; ; page++ {
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select {
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case <-ctx.Done():
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log.Warn("Issue Indexer population shutdown before completion")
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return
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default:
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}
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repos, _, err := models.SearchRepositoryByName(&models.SearchRepoOptions{
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ListOptions: db.ListOptions{Page: page, PageSize: models.RepositoryListDefaultPageSize},
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OrderBy: db.SearchOrderByID,
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Private: true,
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Collaborate: util.OptionalBoolFalse,
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})
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if err != nil {
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log.Error("SearchRepositoryByName: %v", err)
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continue
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}
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if len(repos) == 0 {
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log.Debug("Issue Indexer population complete")
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return
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}
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for _, repo := range repos {
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select {
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case <-ctx.Done():
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log.Info("Issue Indexer population shutdown before completion")
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return
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default:
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}
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UpdateRepoIndexer(repo)
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}
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}
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}
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// UpdateRepoIndexer add/update all issues of the repositories
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func UpdateRepoIndexer(repo *repo_model.Repository) {
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is, err := models.Issues(&models.IssuesOptions{
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RepoID: repo.ID,
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IsClosed: util.OptionalBoolNone,
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IsPull: util.OptionalBoolNone,
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})
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if err != nil {
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log.Error("Issues: %v", err)
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return
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}
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if err = models.IssueList(is).LoadDiscussComments(); err != nil {
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log.Error("LoadComments: %v", err)
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return
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}
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for _, issue := range is {
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UpdateIssueIndexer(issue)
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}
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}
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// UpdateIssueIndexer add/update an issue to the issue indexer
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func UpdateIssueIndexer(issue *models.Issue) {
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var comments []string
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for _, comment := range issue.Comments {
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if comment.Type == models.CommentTypeComment {
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comments = append(comments, comment.Content)
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}
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}
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indexerData := &IndexerData{
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ID: issue.ID,
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RepoID: issue.RepoID,
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Title: issue.Title,
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Content: issue.Content,
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Comments: comments,
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}
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log.Debug("Adding to channel: %v", indexerData)
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if err := issueIndexerQueue.Push(indexerData); err != nil {
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log.Error("Unable to push to issue indexer: %v: Error: %v", indexerData, err)
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}
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}
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// DeleteRepoIssueIndexer deletes repo's all issues indexes
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func DeleteRepoIssueIndexer(repo *repo_model.Repository) {
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var ids []int64
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ids, err := models.GetIssueIDsByRepoID(repo.ID)
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if err != nil {
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log.Error("getIssueIDsByRepoID failed: %v", err)
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return
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}
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if len(ids) == 0 {
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return
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}
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indexerData := &IndexerData{
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IDs: ids,
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IsDelete: true,
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}
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if err := issueIndexerQueue.Push(indexerData); err != nil {
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log.Error("Unable to push to issue indexer: %v: Error: %v", indexerData, err)
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}
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}
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// SearchIssuesByKeyword search issue ids by keywords and repo id
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// WARNNING: You have to ensure user have permission to visit repoIDs' issues
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func SearchIssuesByKeyword(ctx context.Context, repoIDs []int64, keyword string) ([]int64, error) {
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var issueIDs []int64
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indexer := holder.get()
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if indexer == nil {
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log.Error("SearchIssuesByKeyword(): unable to get indexer!")
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return nil, fmt.Errorf("unable to get issue indexer")
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}
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res, err := indexer.Search(ctx, keyword, repoIDs, 50, 0)
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if err != nil {
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return nil, err
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}
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for _, r := range res.Hits {
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issueIDs = append(issueIDs, r.ID)
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}
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return issueIDs, nil
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}
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// IsAvailable checks if issue indexer is available
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func IsAvailable() bool {
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indexer := holder.get()
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if indexer == nil {
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log.Error("IsAvailable(): unable to get indexer!")
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return false
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}
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return indexer.Ping()
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}
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