BroadcastChannel betwen EU and US regions

[bolchowka]

Hello, I deployed my app on Deno Deploy. I'm trying to synchronise app state between regions with BroadcastChannel API. I am connected to a websocket on two browsers: one in europe-central2 region, second in us-east4. Messages sent from Europe are correctly received by BroadcastChannel onmessage handler in US. However, messages sent from US to EU are not received.

I can reproduce the same problem on the Deno Chat demo: https://denochat.deno.dev/. I'm connected to europe-central2 without VPN, and to us-east4 through Tunnelbear. Messages from EU are received by US, but not the other way.

Is this a known issue?

[bolchowka]

I have just tested this again and the problem is gone. Both regions communicate well with each other.

Could that be some infrastructure problem?

[CetinSert]

@bolchowka – this is still occurring between, at least, us-east5 and asia-northeast3.

[bolchowka]

The problem unfortunately persists.

I'm now experiencing problem with asia-east1 instance. Messages sent from this instance are correctly received in other regions, but no messages sent from other regions reach asia-east1. Some regions in Europe also experience the same buggy behaviour.

Is there anything I could do to fix this deliverability problem?

[piscisaureus]

The Deno Deploy team is looking into this issue.

[nesk]

I can confirm the problem persists, I'm currently trying to broadcast some messages from the us-east4 region to the europe-west8 one, but I receive nothing. Until today, it worked fine. Last time I remember testing this and seeing it work was the 8th September.

Did you make any progress on your side?

If you need any help to reproduce the issue, just let me know.

[CetinSert]

@bolchowka – this is still occurring between, at least, us-east5 and asia-northeast3.

This still persists too.

[nesk]

FYI, it seems rather erratic, today it works while yesterday it wasn't. 😅

[nesk]

One more thing: this issue doesn't seem related to a broken deployment. A few hours ago, I've deployed a new version of my app, and the broadcasting from us-east4 to europe-west8 wasn't working. I've just tried once again right now, without deploying, and now it works. Note that the isolates have been shut down in between, fresh ones were started on my last test.

Did the Deno team made any progress on this? It's been one month since the last official message on the subject. It would be reassuring to hear about the team.

[OzySky]

Bump @piscisaureus

[jakeg]

Was this issue resolved? I intend to try out BroadcastChannel tomorrow which will be required to move my web app from Heroku to Deploy, but it's a non-starter if it's not working.

[CetinSert]

Any updates?

[CetinSert]

@piscisaureus – any progress?

[piscisaureus]

@CetinSert does BroadcastChannel still not work right?

[ry]

Should be fixed now, although https://denochat.deno.dev/ is still broken.

[CetinSert]

This is still not working. Is this getting deployed slowly?

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Tested with https://showcase-chat.deno.dev/ ❌ Korea ↔ US ❌ Korea ↔ EU ✔️ Korea ↔ Korea