kafka重平衡不生效

本地启动两个节点，分别配置监听为broker0=ip:9092和broker=ip:9094，并且启动重平衡频率为5s，10%；创建一个topic有5个分区2个备份，平均分配到了节点上，然后将broker1节点下线，此时启用broker0的备份，查询topic详情发现所有分区的leader都是broker0，备份的优先副本还是1，此时再启动broker1，始终没有重平衡分区，查询的topic详情是下面第二种情况，反过来下线broker0再上线的话就触发重平衡，这是为什么？

启动两个broker后创建topic查看topic详情时是：

Topic: test2    TopicId: y2dwPl1ZTeqoFYCJiDS_2A PartitionCount: 5       ReplicationFactor: 2    Configs: retention.ms=20,retention.bytes=20
        Topic: test2    Partition: 0    Leader: 1       Replicas: 1,0   Isr: 1,0
        Topic: test2    Partition: 1    Leader: 0       Replicas: 0,1   Isr: 1,0
        Topic: test2    Partition: 2    Leader: 1       Replicas: 1,0   Isr: 1,0
        Topic: test2    Partition: 3    Leader: 0       Replicas: 0,1   Isr: 1,0
        Topic: test2    Partition: 4    Leader: 1       Replicas: 1,0   Isr: 1,0

然后下线broker1之后，topic详情一直是这样的：

Topic: test2    TopicId: y2dwPl1ZTeqoFYCJiDS_2A PartitionCount: 5       ReplicationFactor: 2    Configs: 
        Topic: test2    Partition: 0    Leader: 0       Replicas: 1,0   Isr: 0
        Topic: test2    Partition: 1    Leader: 0       Replicas: 0,1   Isr: 0
        Topic: test2    Partition: 2    Leader: 0       Replicas: 1,0   Isr: 0
        Topic: test2    Partition: 3    Leader: 0       Replicas: 0,1   Isr: 0
        Topic: test2    Partition: 4    Leader: 0       Replicas: 1,0   Isr: 0