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fix(ssubscribe): re-subscribe sharded pubsub channels individually #2021

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fix(ssubscribe): re-subscribe sharded pubsub channels individually #2021

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23 changes: 21 additions & 2 deletions lib/cluster/ClusterSubscriber.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -192,9 +192,28 @@ export default class ClusterSubscriber {
let pending = 0;
for (const type of ["subscribe", "psubscribe", "ssubscribe"]) {
const channels = previousChannels[type];
if (channels.length) {
if (channels.length == 0) {
continue;
}

debug("%s %d channels", type, channels.length);

if (type === "ssubscribe") {
for (const channel of channels) {
pending += 1;
this.subscriber[type](channel)
.then(() => {
if (!--pending) {
this.lastActiveSubscriber = this.subscriber;
}
})
.catch(() => {
// TODO: should probably disconnect the subscriber and try again.
debug("failed to ssubscribe to channel: %s", channel);
});
}
} else {
pending += 1;
debug("%s %d channels", type, channels.length);
this.subscriber[type](channels)
.then(() => {
if (!--pending) {
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