Technoboy- opened a new pull request, #17867:
URL: https://github.com/apache/pulsar/pull/17867
### Motivation
Fix system service namespace(heartbeat namespace) creates internal
`__change_events` topics:
```
2022-09-28T17:04:24,833 - INFO - [metadata-store-12-1:ServerCnx@1474] -
[/127.0.0.1:50223] Created new producer:
Producer{topic=SystemTopic{topic=persistent://pulsar/localhost:50220/healthcheck},
client=/127.0.0.1:50223, producerName=test-0-0, producerId=0}
2022-09-28T17:04:24,845 - INFO - [pulsar-io-6-3:ConsumerImpl@822] -
[persistent://pulsar/localhost:50220/__change_events-partition-0][multiTopicsReader-895a02f0d4]
Subscribing to topic on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 -
R:localhost/127.0.0.1:50218], consumerId 0
2022-09-28T17:04:24,848 - INFO - [pulsar-io-6-3:ConsumerImpl@822] -
[persistent://pulsar/localhost:50220/__change_events-partition-1][multiTopicsReader-895a02f0d4]
Subscribing to topic on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 -
R:localhost/127.0.0.1:50218], consumerId 1
2022-09-28T17:04:24,849 - INFO - [pulsar-io-6-3:ConsumerImpl@822] -
[persistent://pulsar/localhost:50220/__change_events-partition-2][multiTopicsReader-895a02f0d4]
Subscribing to topic on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 -
R:localhost/127.0.0.1:50218], consumerId 2
2022-09-28T17:04:24,853 - INFO - [pulsar-io-6-3:ConsumerImpl@822] -
[persistent://pulsar/localhost:50220/__change_events-partition-3][multiTopicsReader-895a02f0d4]
Subscribing to topic on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 -
R:localhost/127.0.0.1:50218], consumerId 3
2022-09-28T17:04:24,853 - INFO - [pulsar-io-6-3:ConsumerImpl@822] -
[persistent://pulsar/localhost:50220/__change_events-partition-4][multiTopicsReader-895a02f0d4]
Subscribing to topic on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 -
R:localhost/127.0.0.1:50218], consumerId 4
2022-09-28T17:04:24,856 - INFO - [pulsar-io-6-3:ProducerImpl@1694] -
[persistent://pulsar/localhost:50220/healthcheck] [test-0-0] Created producer
on cnx [id: 0xc6ef1b83, L:/127.0.0.1:50223 - R:localhost/127.0.0.1:50218]
```
### Documentation
- [x] `doc-not-needed`
(Please explain why)
### Matching PR in forked repository
PR in forked repository: https://github.com/Technoboy-/pulsar/pull/8
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