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Avoid unexpected panic in graceful manager (#29629) (#29630)

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Backport #29629

(cherry picked from commit 2f1eb619bc19a9b172062ba17789356bbdaa259d)
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wxiaoguang 2024-03-06 19:00:21 +08:00 • committed by Earl Warren
parent 9f7a51d3d7
commit 7a32382108
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GPG key ID: 0579CB2928A78A00
2 changed files with 18 additions and 2 deletions
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10
modules/graceful/manager_unix.go
View file

@ -118,7 +118,15 @@ func (g *Manager) start(ctx context.Context) {
defer close(startupDone)
// Wait till we're done getting all of the listeners and then close
// the unused ones
g.createServerWaitGroup.Wait()
func() {
// FIXME: there is a fundamental design problem of the "manager" and the "wait group".
// If nothing has started, the "Wait" just panics: sync: WaitGroup is reused before previous Wait has returned
// There is no clear solution besides a complete rewriting of the "manager"
defer func() {
_ = recover()
}()
g.createServerWaitGroup.Wait()
}()
// Ignore the error here there's not much we can do with it
// They're logged in the CloseProvidedListeners function
_ = CloseProvidedListeners()

10
modules/graceful/manager_windows.go
View file

@ -227,7 +227,15 @@ func (g *Manager) awaitServer(limit time.Duration) bool {
c := make(chan struct{})
go func() {
defer close(c)
g.createServerWaitGroup.Wait()
func() {
// FIXME: there is a fundamental design problem of the "manager" and the "wait group".
// If nothing has started, the "Wait" just panics: sync: WaitGroup is reused before previous Wait has returned
// There is no clear solution besides a complete rewriting of the "manager"
defer func() {
_ = recover()
}()
g.createServerWaitGroup.Wait()
}()
}()
if limit > 0 {
select {