kafka Isr存活少了一个会有什么影响，怎么处理啊修订版本明细

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kafka Isr存活少了一个会有什么影响，怎么处理啊

kafka

Topic:mdb_Fd_Route_CHANGC PartitionCount:10 ReplicationFactor:3 Configs:
Topic: mdb_Fd_Route_CHANGC Partition: 0 Leader: 2 Replicas: 2,3,4 Isr: 2,3,4
Topic: mdb_Fd_Route_CHANGC Partition: 1 Leader: 3 Replicas: 3,4,0 Isr: 3,4,0
Topic: mdb_Fd_Route_CHANGC Partition: 2 Leader: 4 Replicas: 4,0,1 Isr: 1,4,0
Topic: mdb_Fd_Route_CHANGC Partition: 3 Leader: 1 Replicas: 0,1,2 Isr: 2,1
Topic: mdb_Fd_Route_CHANGC Partition: 4 Leader: 1 Replicas: 1,2,3 Isr: 2,1,3
Topic: mdb_Fd_Route_CHANGC Partition: 5 Leader: 2 Replicas: 2,4,0 Isr: 0,2,4
Topic: mdb_Fd_Route_CHANGC Partition: 6 Leader: 3 Replicas: 3,0,1 Isr: 3,1,0
Topic: mdb_Fd_Route_CHANGC Partition: 7 Leader: 4 Replicas: 4,1,2 Isr: 2,4,1
Topic: mdb_Fd_Route_CHANGC Partition: 8 Leader: 2 Replicas: 0,2,3 Isr: 3,2
Topic: mdb_Fd_Route_CHANGC Partition: 9 Leader: 1 Replicas: 1,3,4 Isr: 1,3,4

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