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https://github.com/go-gitea/gitea
synced 2024-09-11 00:47:00 +02:00
Fix parallel creating commit status bug with tests (#21911)
This PR is a follow up of #21469 Co-authored-by: Lauris BH <lauris@nix.lv>
This commit is contained in:
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67881ae99a
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b2c4870481
@ -23,11 +23,6 @@ var (
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ErrGetResourceIndexFailed = errors.New("get resource index failed")
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)
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const (
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// MaxDupIndexAttempts max retry times to create index
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MaxDupIndexAttempts = 3
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)
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// SyncMaxResourceIndex sync the max index with the resource
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func SyncMaxResourceIndex(ctx context.Context, tableName string, groupID, maxIndex int64) (err error) {
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e := GetEngine(ctx)
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@ -6,6 +6,7 @@ package git
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import (
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"context"
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"crypto/sha1"
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"errors"
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"fmt"
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"net/url"
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"strings"
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@ -48,79 +49,49 @@ func init() {
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db.RegisterModel(new(CommitStatusIndex))
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}
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// upsertCommitStatusIndex the function will not return until it acquires the lock or receives an error.
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func upsertCommitStatusIndex(ctx context.Context, repoID int64, sha string) (err error) {
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// An atomic UPSERT operation (INSERT/UPDATE) is the only operation
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// that ensures that the key is actually locked.
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switch {
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case setting.Database.UseSQLite3 || setting.Database.UsePostgreSQL:
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_, err = db.Exec(ctx, "INSERT INTO `commit_status_index` (repo_id, sha, max_index) "+
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"VALUES (?,?,1) ON CONFLICT (repo_id,sha) DO UPDATE SET max_index = `commit_status_index`.max_index+1",
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repoID, sha)
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case setting.Database.UseMySQL:
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_, err = db.Exec(ctx, "INSERT INTO `commit_status_index` (repo_id, sha, max_index) "+
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"VALUES (?,?,1) ON DUPLICATE KEY UPDATE max_index = max_index+1",
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repoID, sha)
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case setting.Database.UseMSSQL:
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// https://weblogs.sqlteam.com/dang/2009/01/31/upsert-race-condition-with-merge/
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_, err = db.Exec(ctx, "MERGE `commit_status_index` WITH (HOLDLOCK) as target "+
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"USING (SELECT ? AS repo_id, ? AS sha) AS src "+
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"ON src.repo_id = target.repo_id AND src.sha = target.sha "+
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"WHEN MATCHED THEN UPDATE SET target.max_index = target.max_index+1 "+
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"WHEN NOT MATCHED THEN INSERT (repo_id, sha, max_index) "+
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"VALUES (src.repo_id, src.sha, 1);",
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repoID, sha)
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default:
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return fmt.Errorf("database type not supported")
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}
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return err
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}
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// GetNextCommitStatusIndex retried 3 times to generate a resource index
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func GetNextCommitStatusIndex(repoID int64, sha string) (int64, error) {
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for i := 0; i < db.MaxDupIndexAttempts; i++ {
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idx, err := getNextCommitStatusIndex(repoID, sha)
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if err == db.ErrResouceOutdated {
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continue
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}
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func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
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e := db.GetEngine(ctx)
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// try to update the max_index to next value, and acquire the write-lock for the record
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res, err := e.Exec("UPDATE `commit_status_index` SET max_index=max_index+1 WHERE repo_id=? AND sha=?", repoID, sha)
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if err != nil {
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return 0, err
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}
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affected, err := res.RowsAffected()
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if err != nil {
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return 0, err
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}
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if affected == 0 {
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// this slow path is only for the first time of creating a resource index
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_, errIns := e.Exec("INSERT INTO `commit_status_index` (repo_id, sha, max_index) VALUES (?, ?, 0)", repoID, sha)
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res, err = e.Exec("UPDATE `commit_status_index` SET max_index=max_index+1 WHERE repo_id=? AND sha=?", repoID, sha)
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if err != nil {
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return 0, err
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}
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return idx, nil
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}
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return 0, db.ErrGetResourceIndexFailed
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}
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// getNextCommitStatusIndex return the next index
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func getNextCommitStatusIndex(repoID int64, sha string) (int64, error) {
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ctx, commiter, err := db.TxContext(db.DefaultContext)
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if err != nil {
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return 0, err
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}
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defer commiter.Close()
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var preIdx int64
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_, err = db.GetEngine(ctx).SQL("SELECT max_index FROM `commit_status_index` WHERE repo_id = ? AND sha = ?", repoID, sha).Get(&preIdx)
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if err != nil {
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return 0, err
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affected, err = res.RowsAffected()
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if err != nil {
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return 0, err
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}
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// if the update still can not update any records, the record must not exist and there must be some errors (insert error)
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if affected == 0 {
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if errIns == nil {
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return 0, errors.New("impossible error when GetNextCommitStatusIndex, insert and update both succeeded but no record is updated")
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}
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return 0, errIns
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}
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}
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if err := upsertCommitStatusIndex(ctx, repoID, sha); err != nil {
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return 0, err
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}
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var curIdx int64
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has, err := db.GetEngine(ctx).SQL("SELECT max_index FROM `commit_status_index` WHERE repo_id = ? AND sha = ? AND max_index=?", repoID, sha, preIdx+1).Get(&curIdx)
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// now, the new index is in database (protected by the transaction and write-lock)
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var newIdx int64
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has, err := e.SQL("SELECT max_index FROM `commit_status_index` WHERE repo_id=? AND sha=?", repoID, sha).Get(&newIdx)
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if err != nil {
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return 0, err
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}
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if !has {
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return 0, db.ErrResouceOutdated
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return 0, errors.New("impossible error when GetNextCommitStatusIndex, upsert succeeded but no record can be selected")
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}
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if err := commiter.Commit(); err != nil {
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return 0, err
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}
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return curIdx, nil
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return newIdx, nil
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}
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func (status *CommitStatus) loadAttributes(ctx context.Context) (err error) {
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@ -290,18 +261,18 @@ func NewCommitStatus(opts NewCommitStatusOptions) error {
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return fmt.Errorf("NewCommitStatus[%s, %s]: no user specified", repoPath, opts.SHA)
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}
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// Get the next Status Index
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idx, err := GetNextCommitStatusIndex(opts.Repo.ID, opts.SHA)
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if err != nil {
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return fmt.Errorf("generate commit status index failed: %w", err)
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}
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ctx, committer, err := db.TxContext(db.DefaultContext)
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if err != nil {
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return fmt.Errorf("NewCommitStatus[repo_id: %d, user_id: %d, sha: %s]: %w", opts.Repo.ID, opts.Creator.ID, opts.SHA, err)
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}
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defer committer.Close()
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// Get the next Status Index
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idx, err := GetNextCommitStatusIndex(ctx, opts.Repo.ID, opts.SHA)
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if err != nil {
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return fmt.Errorf("generate commit status index failed: %w", err)
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}
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opts.CommitStatus.Description = strings.TrimSpace(opts.CommitStatus.Description)
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opts.CommitStatus.Context = strings.TrimSpace(opts.CommitStatus.Context)
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opts.CommitStatus.TargetURL = strings.TrimSpace(opts.CommitStatus.TargetURL)
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@ -315,7 +286,7 @@ func NewCommitStatus(opts NewCommitStatusOptions) error {
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// Insert new CommitStatus
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if _, err = db.GetEngine(ctx).Insert(opts.CommitStatus); err != nil {
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return fmt.Errorf("Insert CommitStatus[%s, %s]: %w", repoPath, opts.SHA, err)
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return fmt.Errorf("insert CommitStatus[%s, %s]: %w", repoPath, opts.SHA, err)
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}
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return committer.Commit()
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@ -4,9 +4,11 @@
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package integration
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"path"
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"sync"
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"testing"
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"code.gitea.io/gitea/modules/json"
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@ -114,3 +116,32 @@ func TestRepoCommitsWithStatusFailure(t *testing.T) {
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func TestRepoCommitsWithStatusWarning(t *testing.T) {
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doTestRepoCommitWithStatus(t, "warning", "gitea-exclamation", "yellow")
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}
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func TestRepoCommitsStatusParallel(t *testing.T) {
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defer tests.PrepareTestEnv(t)()
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session := loginUser(t, "user2")
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// Request repository commits page
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req := NewRequest(t, "GET", "/user2/repo1/commits/branch/master")
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resp := session.MakeRequest(t, req, http.StatusOK)
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doc := NewHTMLParser(t, resp.Body)
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// Get first commit URL
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commitURL, exists := doc.doc.Find("#commits-table tbody tr td.sha a").Attr("href")
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assert.True(t, exists)
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assert.NotEmpty(t, commitURL)
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func(t *testing.T, i int) {
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t.Run(fmt.Sprintf("ParallelCreateStatus_%d", i), func(t *testing.T) {
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runBody := doAPICreateCommitStatus(NewAPITestContext(t, "user2", "repo1"), path.Base(commitURL), api.CommitStatusState("pending"))
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runBody(t)
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wg.Done()
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})
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}(t, i)
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}
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wg.Wait()
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}
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