How to recover from out of sync

[sy.pan]

Hi guys:
    
    we have used kafka-0.8.1 under three machines (broker 0,broker 1,broker 3). 
After running several months, some partions is out of sync; how to recover from 
this situation ?

topic desc:

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

zk info:

[zk: localhost:2181(CONNECTED) 2] get /brokers/topics/analyze/partitions/0/state
{"controller_epoch":1,"leader":1,"version":1,"leader_epoch":1,"isr":[1,2]}

Here is the related log in borker 0

state-change.log

./state-change.log.2015-08-01:[2015-08-01 06:01:51,449] WARN Broker 0 received 
invalid LeaderAndIsr request with correlation id 5 from controller 2 epoch 2 
with an older leader epoch 0 for partition [analyze,0], current leader epoch is 
0 (state.change.logger)


controller.log

./controller.log:[2015-08-01 06:01:51,395] WARN [Channel manager on controller 
0]: Not sending request Name: StopReplicaRequest; Version: 0; CorrelationId: 
39; ClientId: ; DeletePartitions: false; ControllerId: 0; ControllerEpoch: 1; 
Partitions: [analyze,0] to broker 0, since it is offline. 
(kafka.controller.ControllerChannelManager)


Thanks and regards