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Fix parallelly generating index failure with Mysql (#24567)

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Lunny Xiao 2023-06-05 18:33:47 +08:00 • committed by GitHub
parent 3d1fda737b
commit 315124b469
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4 changed files with 95 additions and 11 deletions
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34
models/git/commit_status.go
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@ -64,10 +64,32 @@ func postgresGetCommitStatusIndex(ctx context.Context, repoID int64, sha string)
return strconv.ParseInt(string(res[0]["max_index"]), 10, 64)
}
func mysqlGetCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
if _, err := db.GetEngine(ctx).Exec("INSERT INTO `commit_status_index` (repo_id, sha, max_index) "+
"VALUES (?,?,1) ON DUPLICATE KEY UPDATE max_index = max_index+1",
repoID, sha); err != nil {
return 0, err
}
var idx int64
_, err := db.GetEngine(ctx).SQL("SELECT max_index FROM `commit_status_index` WHERE repo_id = ? AND sha = ?",
repoID, sha).Get(&idx)
if err != nil {
return 0, err
}
if idx == 0 {
return 0, errors.New("cannot get the correct index")
}
return idx, nil
}
// GetNextCommitStatusIndex retried 3 times to generate a resource index
func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (int64, error) {
if setting.Database.Type.IsPostgreSQL() {
switch {
case setting.Database.Type.IsPostgreSQL():
return postgresGetCommitStatusIndex(ctx, repoID, sha)
case setting.Database.Type.IsMySQL():
return mysqlGetCommitStatusIndex(ctx, repoID, sha)
}
e := db.GetEngine(ctx)
@ -75,7 +97,7 @@ func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (in
// try to update the max_index to next value, and acquire the write-lock for the record
res, err := e.Exec("UPDATE `commit_status_index` SET max_index=max_index+1 WHERE repo_id=? AND sha=?", repoID, sha)
if err != nil {
return 0, err
return 0, fmt.Errorf("update failed: %w", err)
}
affected, err := res.RowsAffected()
if err != nil {
@ -86,18 +108,18 @@ func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (in
_, errIns := e.Exec("INSERT INTO `commit_status_index` (repo_id, sha, max_index) VALUES (?, ?, 0)", repoID, sha)
res, err = e.Exec("UPDATE `commit_status_index` SET max_index=max_index+1 WHERE repo_id=? AND sha=?", repoID, sha)
if err != nil {
return 0, err
return 0, fmt.Errorf("update2 failed: %w", err)
}
affected, err = res.RowsAffected()
if err != nil {
return 0, err
return 0, fmt.Errorf("RowsAffected failed: %w", err)
}
// if the update still can not update any records, the record must not exist and there must be some errors (insert error)
if affected == 0 {
if errIns == nil {
return 0, errors.New("impossible error when GetNextCommitStatusIndex, insert and update both succeeded but no record is updated")
}
return 0, errIns
return 0, fmt.Errorf("insert failed: %w", errIns)
}
}
@ -105,7 +127,7 @@ func GetNextCommitStatusIndex(ctx context.Context, repoID int64, sha string) (in
var newIdx int64
has, err := e.SQL("SELECT max_index FROM `commit_status_index` WHERE repo_id=? AND sha=?", repoID, sha).Get(&newIdx)
if err != nil {
return 0, err
return 0, fmt.Errorf("select failed: %w", err)
}
if !has {
return 0, errors.New("impossible error when GetNextCommitStatusIndex, upsert succeeded but no record can be selected")