Hi Jun, Thanks for the reply.
But this case arises one more questions that, If all the 3 down brokers are crashed and we have added some new brokers, is there any way to re-balance those replicas to make partition available? OR any tool to balance the number of replicas if any one of the ISR goes down but the controller active? As this helps to make high data availability. Thanks, Yogesh Sangvikar On Wed, Jun 19, 2013 at 8:53 PM, Jun Rao <jun...@gmail.com> wrote: > If leader is -1, that indicates the partition is unavailable. Were replicas > 4,2,3 all down at that time? If so, you need to start at least one of those > brokers to make the partition available again. > > Thanks, > > Jun > > > On Wed, Jun 19, 2013 at 5:05 AM, Yogesh Sangvikar < > yogesh.sangvi...@gmail.com> wrote: > > > Hi Team, > > > > Please help to understand following questing as we are planning to use > > kafka 0.8 in our production, > > 1. We found the 'leader: -1' state, when the leader selection will happen > > for such partitions? Does the partition data will be unavailable till > that > > time? > > > > example: > > topic: test1 partition: 0 leader: -1 replicas: 4,2,3 isr: > > topic: test1 partition: 1 leader: 0 replicas: 0,3,4 isr: 0,4 > > topic: test1 partition: 2 leader: 1 replicas: 1,4,0 isr: > 1,0,4 > > > > 2. Do we need to restart the brokers to update the isr entries to remove > > the unavailable brokers? > > > > Thanks, > > Yogesh Sangvikar > > >
