[Enhancement] Add counter for marker messages to "pulsar-admin topics analyze-backlog"

[lhotari]

Search before reporting

• I searched in the issues and found nothing similar.

Motivation

Pulsar Admin contains a command for analysing the topic backlog. However, the counters don't return the amount of marker messages. It would be useful to distinguish marker messages from ordinary messages.

Solution

• add the field to org.apache.pulsar.common.stats.AnalyzeSubscriptionBacklogResult
• add the counter logic to org.apache.pulsar.broker.service.persistent.PersistentSubscription#analyzeBacklog

Alternatives

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[lhotari]

Another related enhancement: #25083

[oneby-wang]

Hi, @lhotari, I would like to contribute if this enhancement is not assigned.

[lhotari]

Hi, @lhotari, I would like to contribute if this enhancement is not assigned.

@oneby-wang Thanks for volunteering! I've assigned also #25083 to you since it is closely related.

[oneby-wang]

Got.