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@ -425,15 +425,21 @@ void RoundRobin::RoundRobinSubchannelList::UnrefForConnectivityWatch( |
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} |
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void RoundRobin::RoundRobinSubchannelList::StartWatchingLocked() { |
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// FIXME: consider moving this to SubchannelList ctor
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// FIXME: add explanatory comment
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gpr_log(GPR_INFO, "BEFORE: CheckConnectivityStateLocked loop"); |
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if (num_subchannels() == 0) return; |
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// Check current state of each subchannel synchronously, since any
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// subchannel already used by some other channel may have a non-IDLE
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// state. This will invoke ProcessConnectivityChangeLocked() for each
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// subchannel whose state is not IDLE. However, because initialized_
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// is still false, the code there will (a) skip re-resolution for any
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// subchannel in state TRANSIENT_FAILURE and (b) not call
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// UpdateOverallStateLocked().
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for (size_t i = 0; i < num_subchannels(); ++i) { |
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subchannel(i)->CheckConnectivityStateLocked(); |
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} |
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gpr_log(GPR_INFO, "AFTER: CheckConnectivityStateLocked loop"); |
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// Now set initialized_ to true and call UpdateOverallStateLocked().
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initialized_ = true; |
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UpdateOverallStateLocked(); |
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// Start connectivity watch for each subchannel.
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for (size_t i = 0; i < num_subchannels(); i++) { |
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if (subchannel(i)->subchannel() != nullptr) { |
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RefForConnectivityWatch("connectivity_watch"); |
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@ -468,12 +474,11 @@ void RoundRobin::RoundRobinSubchannelList::UpdateStateCountersLocked( |
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last_transient_failure_error_ = transient_failure_error; |
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} |
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/** Sets the policy's connectivity status based on that of the passed-in \a sd
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* (the grpc_lb_subchannel_data associated with the updated subchannel) and the |
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* subchannel list \a sd belongs to (sd->subchannel_list). \a error will be used |
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* only if the policy transitions to state TRANSIENT_FAILURE. */ |
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// Sets the RR policy's connectivity state based on the current
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// subchannel list.
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void RoundRobin::RoundRobinSubchannelList::UpdateConnectivityStateLocked() { |
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RoundRobin* p = static_cast<RoundRobin*>(policy()); |
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// Only set connectivity state if this is the current subchannel list.
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if (p->subchannel_list_ != this) return; |
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/* In priority order. The first rule to match terminates the search (ie, if we
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* are on rule n, all previous rules were unfulfilled). |
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@ -536,10 +541,8 @@ void RoundRobin::RoundRobinSubchannelList::UpdateOverallStateLocked() { |
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// Drain pending picks.
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p->DrainPendingPicksLocked(); |
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} |
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// Only update connectivity based on the selected subchannel list.
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if (p->subchannel_list_ == this) { |
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UpdateConnectivityStateLocked(); |
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} |
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// Update the RR policy's connectivity state if needed.
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UpdateConnectivityStateLocked(); |
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} |
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void RoundRobin::RoundRobinSubchannelData::ProcessConnectivityChangeLocked( |
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