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xdsclient: always backoff between new streams even after successful stream #5280

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merged 3 commits into from Apr 1, 2022
+29 −35
Merged

xdsclient: always backoff between new streams even after successful stream #5280

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f62e303
xdsclient: apply initial backoff on successful stream
dfawley Mar 29, 2022
0351a06
consider backoff between stream creation times, not end of previous t…
dfawley Mar 29, 2022
104628d
pass backoff to xds client controller
dfawley Apr 1, 2022
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26 changes: 8 additions & 18 deletions xds/internal/xdsclient/controller/transport.go
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Expand Up @@ -59,24 +59,18 @@ func (t *Controller) run(ctx context.Context) {
// report error (and log) when stats is transient failure.

retries := 0
first := true
for {
select {
case <-ctx.Done():
return
default:
}

if retries != 0 {
if !first {
timer := time.NewTimer(t.backoff(retries))
select {
case <-timer.C:
case <-ctx.Done():
if !timer.Stop() {
<-timer.C
}
timer.Stop()
return
}
}
first = false

retries++
stream, err := t.vClient.NewStream(ctx, t.cc)
Expand Down Expand Up @@ -370,22 +364,18 @@ func (t *Controller) processAckInfo(ack *ackAction, stream grpc.ClientStream) (t
// It blocks until the context is cancelled.
func (t *Controller) reportLoad(ctx context.Context, cc *grpc.ClientConn, opts controllerversion.LoadReportingOptions) {
retries := 0
first := true
for {
if ctx.Err() != nil {
return
}

if retries != 0 {
if !first {
timer := time.NewTimer(t.backoff(retries))
select {
case <-timer.C:
case <-ctx.Done():
if !timer.Stop() {
<-timer.C
}
timer.Stop()
return
}
}
first = false

retries++
stream, err := t.vClient.NewLoadStatsStream(ctx, cc)
Expand Down