Broker not in ISR.

Hi,

I have a set up of 3 kafka servers, with a replication factor of 2.
I have only one topic in this setup as of now.

bin/kafka-list-topic.sh --zookeeper
server1:2181,server2:2181,server3:2181 --topic topic1
topic: topic1 partition: 0 leader: 1 replicas: 2,1 isr: 1
topic: topic1 partition: 1 leader: 0 replicas: 0,2 isr: 0
topic: topic1 partition: 2 leader: 1 replicas: 1,0 isr: 0,1
topic: topic1 partition: 3 leader: 0 replicas: 2,0 isr: 0
topic: topic1 partition: 4 leader: 0 replicas: 0,1 isr: 0,1
topic: topic1 partition: 5 leader: 1 replicas: 1,2 isr: 1
topic: topic1 partition: 6 leader: 1 replicas: 2,1 isr: 1
topic: topic1 partition: 7 leader: 0 replicas: 0,2 isr: 0
topic: topic1 partition: 8 leader: 1 replicas: 1,0 isr: 0,1
topic: topic1 partition: 9 leader: 0 replicas: 2,0 isr: 0
topic: topic1 partition: 10 leader: 0 replicas: 0,1 isr: 0,1
topic: topic1 partition: 11 leader: 1 replicas: 1,2 isr: 1

The Third broker is not in the ISR list. There are no errors in the logs.
The Thread dump doesn't have any thread with "RepliacaFetcherManager"
*Thread Dump