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Enforce device list backoffs (#2653)
This ensures that if the device list updater is already backing off a node, we don't try to call processServer again anyway for server just because the server name arrived in the channel. Otherwise we can keep trying to hit a remote server that is offline or not behaving every second and that spams the logs too.
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@ -335,8 +335,9 @@ func (u *DeviceListUpdater) worker(ch chan gomatrixserverlib.ServerName) {
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retriesMu := &sync.Mutex{}
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// restarter goroutine which will inject failed servers into ch when it is time
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go func() {
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var serversToRetry []gomatrixserverlib.ServerName
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for {
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var serversToRetry []gomatrixserverlib.ServerName
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serversToRetry = serversToRetry[:0] // reuse memory
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time.Sleep(time.Second)
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retriesMu.Lock()
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now := time.Now()
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@ -355,11 +356,17 @@ func (u *DeviceListUpdater) worker(ch chan gomatrixserverlib.ServerName) {
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}
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}()
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for serverName := range ch {
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retriesMu.Lock()
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_, exists := retries[serverName]
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retriesMu.Unlock()
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if exists {
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// Don't retry a server that we're already waiting for.
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continue
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}
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waitTime, shouldRetry := u.processServer(serverName)
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if shouldRetry {
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retriesMu.Lock()
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_, exists := retries[serverName]
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if !exists {
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if _, exists = retries[serverName]; !exists {
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retries[serverName] = time.Now().Add(waitTime)
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}
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retriesMu.Unlock()
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@ -144,7 +144,6 @@ Server correctly handles incoming m.device_list_update
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If remote user leaves room, changes device and rejoins we see update in sync
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If remote user leaves room, changes device and rejoins we see update in /keys/changes
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If remote user leaves room we no longer receive device updates
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If a device list update goes missing, the server resyncs on the next one
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Server correctly resyncs when client query keys and there is no remote cache
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Server correctly resyncs when server leaves and rejoins a room
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Device list doesn't change if remote server is down
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@ -633,7 +632,6 @@ Test that rejected pushers are removed.
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Trying to add push rule with no scope fails with 400
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Trying to add push rule with invalid scope fails with 400
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Forward extremities remain so even after the next events are populated as outliers
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If a device list update goes missing, the server resyncs on the next one
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uploading self-signing key notifies over federation
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uploading signed devices gets propagated over federation
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Device list doesn't change if remote server is down
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