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grpc-js: Make a reachable code path for requestReresolution in pick_first

This commit is contained in:
Michael Lumish 2022-04-14 17:28:22 -07:00
parent 478900d191
commit 8cbc3dc825
1 changed files with 14 additions and 10 deletions
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24
packages/grpc-js/src/load-balancer-pick-first.ts
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@ -184,8 +184,10 @@ export class PickFirstLoadBalancer implements LoadBalancer {
) {
/* If all of the subchannels are IDLE we should go back to a
* basic IDLE state where there is no subchannel list to avoid
* holding unused resources */
this.resetSubchannelList();
* holding unused resources. We do not reset triedAllSubchannels
* because that is a reminder to request reresolution the next time
* this LB policy needs to connect. */
this.resetSubchannelList(false);
this.updateState(ConnectivityState.IDLE, new QueuePicker(this));
return;
}
@ -337,7 +339,7 @@ export class PickFirstLoadBalancer implements LoadBalancer {
this.channelControlHelper.updateState(newState, picker);
}
private resetSubchannelList() {
private resetSubchannelList(resetTriedAllSubchannels = true) {
for (const subchannel of this.subchannels) {
subchannel.removeConnectivityStateListener(this.subchannelStateListener);
subchannel.unref();
@ -352,7 +354,9 @@ export class PickFirstLoadBalancer implements LoadBalancer {
[ConnectivityState.TRANSIENT_FAILURE]: 0,
};
this.subchannels = [];
this.triedAllSubchannels = false;
if (resetTriedAllSubchannels) {
this.triedAllSubchannels = false;
}
}
/**
@ -425,6 +429,12 @@ export class PickFirstLoadBalancer implements LoadBalancer {
}
exitIdle() {
if (
this.currentState === ConnectivityState.IDLE ||
this.triedAllSubchannels
) {
this.channelControlHelper.requestReresolution();
}
for (const subchannel of this.subchannels) {
subchannel.startConnecting();
}
@ -433,12 +443,6 @@ export class PickFirstLoadBalancer implements LoadBalancer {
this.connectToAddressList();
}
}
if (
this.currentState === ConnectivityState.IDLE ||
this.triedAllSubchannels
) {
this.channelControlHelper.requestReresolution();
}
}
resetBackoff() {