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Transaction-aware retry create issue to cope with duplicate keys (#8307)

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* Revert #7898

* Transaction-aware retry create issue to cope with duplicate keys

* Restore INSERT ... WHERE usage

* Rearrange code for clarity

* Fix error return in newIssue()

* Fix error message
This commit is contained in:
guillep2k 2019-10-02 19:28:30 -03:00 committed by Antoine GIRARD
parent c9f819eae0
commit cd13f273d1
3 changed files with 57 additions and 18 deletions
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15
models/error.go
View file

@ -1089,6 +1089,21 @@ func (err ErrIssueLabelTemplateLoad) Error() string {
return fmt.Sprintf("Failed to load label template file '%s': %v", err.TemplateFile, err.OriginalError)
}
// ErrNewIssueInsert is used when the INSERT statement in newIssue fails
type ErrNewIssueInsert struct {
OriginalError error
}
// IsErrNewIssueInsert checks if an error is a ErrNewIssueInsert.
func IsErrNewIssueInsert(err error) bool {
_, ok := err.(ErrNewIssueInsert)
return ok
}
func (err ErrNewIssueInsert) Error() string {
return err.OriginalError.Error()
}
// __________ .__ .__ __________ __
// \______ \__ __| | | |\______ \ ____ ________ __ ____ _______/ |_
// | ___/ | \ | | | | _// __ \/ ____/ | \_/ __ \ / ___/\ __\

40
models/issue.go
View file

@ -1104,21 +1104,10 @@ func newIssue(e *xorm.Session, doer *User, opts NewIssueOptions) (err error) {
}
// Milestone and assignee validation should happen before insert actual object.
// There's no good way to identify a duplicate key error in database/sql; brute force some retries
dupIndexAttempts := issueMaxDupIndexAttempts
for {
_, err := e.SetExpr("`index`", "coalesce(MAX(`index`),0)+1").
Where("repo_id=?", opts.Issue.RepoID).
Insert(opts.Issue)
if err == nil {
break
}
dupIndexAttempts--
if dupIndexAttempts <= 0 {
return err
}
if _, err := e.SetExpr("`index`", "coalesce(MAX(`index`),0)+1").
Where("repo_id=?", opts.Issue.RepoID).
Insert(opts.Issue); err != nil {
return ErrNewIssueInsert{err}
}
inserted, err := getIssueByID(e, opts.Issue.ID)
@ -1201,6 +1190,24 @@ func newIssue(e *xorm.Session, doer *User, opts NewIssueOptions) (err error) {
// NewIssue creates new issue with labels for repository.
func NewIssue(repo *Repository, issue *Issue, labelIDs []int64, assigneeIDs []int64, uuids []string) (err error) {
// Retry several times in case INSERT fails due to duplicate key for (repo_id, index); see #7887
i := 0
for {
if err = newIssueAttempt(repo, issue, labelIDs, assigneeIDs, uuids); err == nil {
return nil
}
if !IsErrNewIssueInsert(err) {
return err
}
if i++; i == issueMaxDupIndexAttempts {
break
}
log.Error("NewIssue: error attempting to insert the new issue; will retry. Original error: %v", err)
}
return fmt.Errorf("NewIssue: too many errors attempting to insert the new issue. Last error was: %v", err)
}
func newIssueAttempt(repo *Repository, issue *Issue, labelIDs []int64, assigneeIDs []int64, uuids []string) (err error) {
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
@ -1214,7 +1221,7 @@ func NewIssue(repo *Repository, issue *Issue, labelIDs []int64, assigneeIDs []in
Attachments: uuids,
AssigneeIDs: assigneeIDs,
}); err != nil {
if IsErrUserDoesNotHaveAccessToRepo(err) {
if IsErrUserDoesNotHaveAccessToRepo(err) || IsErrNewIssueInsert(err) {
return err
}
return fmt.Errorf("newIssue: %v", err)
@ -1223,7 +1230,6 @@ func NewIssue(repo *Repository, issue *Issue, labelIDs []int64, assigneeIDs []in
if err = sess.Commit(); err != nil {
return fmt.Errorf("Commit: %v", err)
}
sess.Close()
return nil
}

20
models/pull.go
View file

@ -657,6 +657,24 @@ func (pr *PullRequest) testPatch(e Engine) (err error) {
// NewPullRequest creates new pull request with labels for repository.
func NewPullRequest(repo *Repository, pull *Issue, labelIDs []int64, uuids []string, pr *PullRequest, patch []byte, assigneeIDs []int64) (err error) {
// Retry several times in case INSERT fails due to duplicate key for (repo_id, index); see #7887
i := 0
for {
if err = newPullRequestAttempt(repo, pull, labelIDs, uuids, pr, patch, assigneeIDs); err == nil {
return nil
}
if !IsErrNewIssueInsert(err) {
return err
}
if i++; i == issueMaxDupIndexAttempts {
break
}
log.Error("NewPullRequest: error attempting to insert the new issue; will retry. Original error: %v", err)
}
return fmt.Errorf("NewPullRequest: too many errors attempting to insert the new issue. Last error was: %v", err)
}
func newPullRequestAttempt(repo *Repository, pull *Issue, labelIDs []int64, uuids []string, pr *PullRequest, patch []byte, assigneeIDs []int64) (err error) {
sess := x.NewSession()
defer sess.Close()
if err = sess.Begin(); err != nil {
@ -671,7 +689,7 @@ func NewPullRequest(repo *Repository, pull *Issue, labelIDs []int64, uuids []str
IsPull: true,
AssigneeIDs: assigneeIDs,
}); err != nil {
if IsErrUserDoesNotHaveAccessToRepo(err) {
if IsErrUserDoesNotHaveAccessToRepo(err) || IsErrNewIssueInsert(err) {
return err
}
return fmt.Errorf("newIssue: %v", err)