AnonHxy opened a new pull request, #15766:
URL: https://github.com/apache/pulsar/pull/15766
### Motivation
* Synchronized `topicPublishRateLimiter` update action to prevent resource
leakages:
* Thread1: `topicPublishRateLimiter ` is null, and and it will not
invoke `close` in line:1216. Then it stop before line:1219
* Thread2: set `topicPublishRateLimiter` a new value, for example,
`limiter2`. Then thread2 stop.
* Thread1: set `topicPublishRateLimiter ` as
`PublishRateLimiter.DISABLED_RATE_LIMITER` at line:1219
* `limter2` will never be accessable, and may cause resource leakages.
https://github.com/apache/pulsar/blob/eee038870db95e009abde32e89b9d736a9e9cd1c/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/AbstractTopic.java#L1213-L1222
### Modifications
Sync `updatePublishDispatcher()'
### Verifying this change
- [x] Make sure that the change passes the CI checks.
### Documentation
- [x] `no-need-doc`
(Please explain why)
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