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`NATS: Subject must be supplied` when `msg.ack`

See original GitHub issue

I am getting this very weird situation in which sometimes I get NATS: Subject must be supplied when ack’ing a message. It goes away after restart. The weird part is that the connection is stable and I do receive messages on the subscription. But when this happens the instance cannot ack a message any longer, it always fail with this until I restart it. Any idea what my be causing this?

Issue Analytics

State:
Created 4 years ago
Reactions:3
Comments:27 (17 by maintainers)

Top GitHub Comments

1reaction

nazar-pccommented, Sep 3, 2019

Hm… we observe this on subscriptions that were active and running for days without issues, but suddenly we starte getting those errors that do not go away unless restarting.

0reactions

aricartcommented, Dec 3, 2019

@nazar-pc looks like there has not been a resurgence of this issue. If you see it happening again, please reopen.

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The wire protocol used to communicate between the NATS server and clients is a simple, text-based publish/subscribe style protocol.

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Network.Nats.Message.Message - Hackage

The PUB message publishes the message payload to the given subject name. If a reply subject is supplied, it will be delivered to...

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This wildcard must be the last character in the subject. ... nats bench --ack --msgs 10000 ORDERS.bench # benchmark core nats publish and ......

Modules - NATS Docs

async def subscribe_handler(msg): subject = msg.subject reply = msg.reply data = msg.data.decode() ... ack acknowledges a message delivered by JetStream.