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Prevent panic during wrappedConn close at hammertime (#11219)

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* Prevent panic during wrappedConn close at hammertime

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Update modules/graceful/server.go

* Fix extraneous debug in goldmark.go

Signed-off-by: Andrew Thornton <art27@cantab.net>
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zeripath 2020-04-27 01:01:06 +01:00 • committed by GitHub
parent 9f959ac064
commit 0e799c26ba
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2 changed files with 11 additions and 1 deletions
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11
modules/graceful/server.go
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@ -250,6 +250,17 @@ type wrappedConn struct {
func (w wrappedConn) Close() error {
if atomic.CompareAndSwapInt32(w.closed, 0, 1) {
defer func() {
if err := recover(); err != nil {
select {
case <-GetManager().IsHammer():
// Likely deadlocked request released at hammertime
log.Warn("Panic during connection close! %v. Likely there has been a deadlocked request which has been released by forced shutdown.", err)
default:
log.Error("Panic during connection close! %v", err)
}
}
}()
w.server.wg.Done()
}
return w.Conn.Close()