The problem of multiple keys in ConfigWatch

[ChaoyongLiang]

Hi,
I'm using consul config in a spring application, but I found a problem in the ConfigWatch.
I have two keys to watch. One is config/application/data which is for the common configuration, the ohter is config/appName/data which is for the private configuraion.
I hope that one of them is updated in consul, I need to kown the notification from consul. However, If config/application/data is blocked in the ConfigWatch and config/appName/data is updated now, the Spring application can't get any notification from consul. Because config keys are not blocked in the same time, they do watch action one by one. Therefore one key is blocked in watch, the other will not get any notification even if it has been updated.

for (String context : this.consulIndexes.keySet()) {
...
    Response<List<GetValue>> response = this.consul.getKVValues(context, aclToken,
        new QueryParams(this.properties.getWatch().getWaitTime(),
            currentIndex));
...
}

So, how can I do to solve this problem?

Thanks.

[spencergibb]

They are executed in order. Are you saying that if one is updated while watching the other that the other is never updated?

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[ChaoyongLiang]

They are executed in order. Are you saying that if one is updated while watching the other that the other is never updated?

Hello, thank you for your answer.

The othe is not never updated, it will update after the watching key has updated or watch timeout.
eg:
If config/application/data is blocked for 5 minutes in the ConfigWatch, the other key config/appName/data is updated now. However, I can't get notifycation from consul. Because ConfigWatch is watching the key config/application/data in process.

After 5 minutes, the watching config/application/data is returned, ConfigWatch starts to watch the other key config/appName/data, I can get notifycation from consul because the key has been updated.
But the notifycation is delayed in 5 minutes.

I means that ConfigWatch should watch all keys that belong to the application concurrently, instead of one by one.

[spencergibb]

I think the answer would be to execute them in parallel using projectreactor.io.

[SamG1000]

Also looking for the same fix, concurrently watching each key seems to make most sense👍