FE: Consumer lag = 0 when server returns null

[quangdutran]

Issue submitter TODO list

• I've looked up my issue in FAQ
• I've searched for an already existing issues here
• I've tried running main-labeled docker image and the issue still persists there
• I'm running a supported version of the application which is listed here

Describe the bug (actual behavior)

Consumer Lag shows 0 when response from server is null. Bring back from this.

Expected behavior

This should be N/A as I understand because in the list of consumers, it is N/A

Your installation details

Docker ghcr.io/kafbat/kafka-ui latest

Steps to reproduce

• Create topic, producer and consumer
• Send a message
• Check the Consumer Lag in consumer detail

Screenshots

No response

Logs

No response

Additional context

No response

[github-actions]

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[quangdutran]

@Haarolean If you think that this bug is valid, I would suggest a fix like this:

Instead of counting as 0 if consumer lag is not set:

https://github.com/kafbat/kafka-ui/blob/main/frontend/src/components/ConsumerGroups/Details/ListItem.tsx#L36

I could check if all consumers having null consumer lag then show N/A, consistent with consumer list. What do you think?

[Haarolean]

@Haarolean If you think that this bug is valid, I would suggest a fix like this:

Instead of counting as 0 if consumer lag is not set:

https://github.com/kafbat/kafka-ui/blob/main/frontend/src/components/ConsumerGroups/Details/ListItem.tsx#L36

I could check if all consumers having null consumer lag then show N/A, consistent with consumer list. What do you think?

yeah, let's match the logic from the consumer list. Feel free to raise a PR!