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-rw-r--r--modules/caddyhttp/caddyhttp.go37
1 files changed, 21 insertions, 16 deletions
diff --git a/modules/caddyhttp/caddyhttp.go b/modules/caddyhttp/caddyhttp.go
index 576620e..24121c1 100644
--- a/modules/caddyhttp/caddyhttp.go
+++ b/modules/caddyhttp/caddyhttp.go
@@ -322,22 +322,27 @@ func (app *App) Stop() error {
return err
}
}
- // TODO: Closing the http3.Server is the right thing to do,
- // however, doing so sometimes causes connections from clients
- // to fail after config reloads due to a bug that is yet
- // unsolved: https://github.com/caddyserver/caddy/pull/2727
- // for _, s := range app.h3servers {
- // // TODO: CloseGracefully, once implemented upstream
- // // (see https://github.com/lucas-clemente/quic-go/issues/2103)
- // err := s.Close()
- // if err != nil {
- // return err
- // }
- // }
- // as of September 2019, closing the http3.Server
- // instances doesn't close their underlying listeners
- // so we have todo that ourselves
- // (see https://github.com/lucas-clemente/quic-go/issues/2103)
+
+ // close the http3 servers; it's unclear whether the bug reported in
+ // https://github.com/caddyserver/caddy/pull/2727#issuecomment-526856566
+ // was ever truly fixed, since it seemed racey/nondeterministic; but
+ // recent tests in 2020 were unable to replicate the issue again after
+ // repeated attempts (the bug manifested after a config reload; i.e.
+ // reusing a http3 server or listener was problematic), but it seems
+ // to be working fine now
+ for _, s := range app.h3servers {
+ // TODO: CloseGracefully, once implemented upstream
+ // (see https://github.com/lucas-clemente/quic-go/issues/2103)
+ err := s.Close()
+ if err != nil {
+ return err
+ }
+ }
+
+ // closing an http3.Server does not close their underlying listeners
+ // since apparently the listener can be used both by servers and
+ // clients at the same time; so we need to manually call Close()
+ // on the underlying h3 listeners (see lucas-clemente/quic-go#2103)
for _, pc := range app.h3listeners {
err := pc.Close()
if err != nil {