congbo

one question. leader load the topic, may cause the normal topic become fence. may need to consider how to not affect the normal topic behavior.

Hi @syhily TransactionCoordinator loadBalance base on partition topic `persistent://pulsar/system/transaction_coordinator_assign` , so when starting transaction client, make sure that partition topic `persistent://pulsar/system/transaction_coordinator_assign` has been created. Otherwise `persistent://pulsar/system/transaction_coordinator_assign` will be automatically created...

@syhily What users should care about is whether the transaction is fully enabled, rather than using it when it is not fully enabled, isn't it? If there are no other...

> Just one suggestion about the new option name > > Maybe `messagesFromMultiTopicsEnabled=true` is more understandable. And add a description of the behavior if the user disables it. It looks...

https://github.com/apache/pulsar/blob/adae4ae2b06304eae9ec001357e0bd6ee6ffb053/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentTopic.java#L3030-L3046 I think this method only need to check whether have schema, if doesn't hava schema then add the schema, if have shema then check the compatible. so the code...

@poorbarcode mainly to fix the flaky test, this is just to remove the wrong logic

@thetumbled hi, I move this PR to release/2.9.5, if you have any questions, please ping me. thanks.

@TakaHiR07 hi, I move this PR to release/2.9.5, if you have any questions, please ping me. thanks.

@thetumbled hi, could you please merge the `apache/master` branch, seem the test can't rerun

``` Error: org.apache.pulsar.broker.service.ReplicatorSubscriptionWithTransactionTest.testReplicatedSubscriptionWhenReplicatorProducerIsClosed Time elapsed: 12.567 s