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https://issues.apache.org/jira/browse/KAFKA-4629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15825545#comment-15825545
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huxi commented on KAFKA-4629:
-----------------------------
Thanks for [~alberto.fo...@natwestmarkets.com]'s response. After some
debugging, I found that BrokerTopicMetrics.close could always be invoked even
the corresponding MBeans did not get removed. Seems that it's not caused by
Kafka code. Might need to investigate whether it's a known issue for
metrics-core library.
> Per topic MBeans leak
> ---------------------
>
> Key: KAFKA-4629
> URL: https://issues.apache.org/jira/browse/KAFKA-4629
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.0.1
> Reporter: Alberto Forti
> Priority: Minor
>
> Hi,
> In our application we create and delete topics dynamically. Most of the times
> when a topic is deleted the related MBeans are not deleted. Example of MBean:
> kafka.server:type=BrokerTopicMetrics,name=TotalProduceRequestsPerSec,topic=dw_06b5f828-e452-4e22-89c9-67849a65603d
> Also, deleting a topic often produces (what I think is) noise in the logs at
> WARN level. One example is:
> WARN PartitionStateMachine$DeleteTopicsListener:83 - [DeleteTopicsListener
> on 1]: Ignoring request to delete non-existing topics
> dw_fe8ff14b-aa9b-4f24-9bc1-6fbce15d20d2
> Easy reproducible with a basic Kafka cluster with two brokers, just create
> and delete topics few times. Sometimes the MBeans for the topic are deleted
> and sometimes are not.
> I'm creating and deleting topics using the AdminUtils class in the Java API:
> AdminUtils.deleteTopic(zkUtils, topicName);
> AdminUtils.createTopic(zkUtils, topicName, partitions, replicationFactor,
> topicConfiguration, kafka.admin.RackAwareMode.Enforced$.MODULE$);
> Kafka version: 0.10.0.1 (haven't tried other versions)
> Thanks,
> Alberto
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