equanz commented on issue #15471:
URL: https://github.com/apache/pulsar/issues/15471#issuecomment-1120715123

   Thank you for sharing the issue. Could you tell me full stack traces and use 
cases, please? (I'm not sure when the publisher's producerName is null.)
   
   The `isSupportsPartialProducer` is false means the broker conf 
`aggregatePublisherStatsByProducerName` is true and old publishers connects to 
the topic? Or, `aggregatePublisherStatsByProducerName` is false?
   
https://github.com/apache/pulsar/blob/f5019c81d2680b816eac768b1896333e04ab4214/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/Producer.java#L131-L139
   


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