title: What does kafka.server:type=KafkaServer,name=BrokerState with 4 mean?
body: <p>One broker shows <code>kafka.server:type=KafkaServer,name=BrokerState</code> mbean with the value of <code>4</code>.</p>
  
  <p><a href="https://i.stack.imgur.com/LrbiW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LrbiW.png" alt="enter image description here"></a></p>
  
  <p>I found <a href="https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/server/BrokerStates.scala" rel="nofollow noreferrer">BrokerStates</a> that shows values for 0, 1, 2, 3, 6, and 7. What's <code>4</code>?</p>