Error: consumer info specifies deliver_subject - pull consumers cannot have deliver_subject set

I have this configuration that throws the above error when I start the server

const opts = consumerOpts()
    opts.durable(this.queueGroupName))
    opts.manualAck()
    opts.ackExplicit()
    let sub = await this.client.jetstream().pullSubscribe(this.subject, opts)

What am I doing wrong? This code is derived from this documentation

[aricart]

setInterval(() => { sub.pull({ batch: 10, no_wait: true }) }, 1000)

That code is a server spam because every second you are asking for 10 messages, and for the request to fail immediately if there are no messages - instead, specify an expires that is possibly 2000, and an interval that is slightly smaller - this will keep the pull open and if messages arrive before the pull expires, they will be fed to you then.

This requires more coordination - the library will help you coordinate this type of action soon - as we are actively looking into making the consumers pull by default (to simplify importing streams) and automatically have them re-pull every so oftne.

[aricart]

@Nahasean94

(async () => { for await(const m of sub) { console.log(“\n”, m.subject); m.ack(); } })();

The IDE is right. While you don’t need to await it, you should probably handle what happens - so in the case above, if the subscription were to throw an error or was to end unexpectedly something you wouldn’t know about it - the reason for the linter warning is more about an error - if the function threw an error in the loop, that would kill your node process.

typically you:

(async () => { for await(const m of sub) { console.log(“\n”, m.subject); m.ack(); } })().then(()=>{console.log(…)}).catch((err) => { //something bad});