Make sure that there is no under replicated partitions (use the --under-replicated option in the list topic command) before you run that tool.
Thanks, Jun On Wed, Oct 16, 2013 at 12:29 AM, Kane Kane <kane.ist...@gmail.com> wrote: > Yes, thanks, looks like that's what i need, do you know why it tends to > choose the leader for all partitions on the single broker, despite I have > 3? > > > On Wed, Oct 16, 2013 at 12:19 AM, Joel Koshy <jjkosh...@gmail.com> wrote: > > > Did the reassignment complete? If the assigned replicas are in ISR and > > the preferred replicas for the partitions are evenly distributed > > across the brokers (which seems to be a case on a cursory glance of > > your assignment) you can use this tool: > > > > > https://cwiki.apache.org/confluence/display/KAFKA/Replication+tools#Replicationtools-2.PreferredReplicaLeaderElectionTool > > > > On Wed, Oct 16, 2013 at 12:15 AM, Kane Kane <kane.ist...@gmail.com> > wrote: > > > Oh i see, what is the better way to initiate the leader change? As I > told > > > somehow all my partitions have the same leader for some reason. I have > 3 > > > brokers and all partitions have leader on single one. > > > > > > > > > On Wed, Oct 16, 2013 at 12:04 AM, Joel Koshy <jjkosh...@gmail.com> > > wrote: > > > > > >> For a leader change yes, but this is partition reassignment which > > >> completes when all the reassigned replicas are in sync with the > > >> original replica(s). You can check the status of the command using the > > >> option I mentioned earlier. > > >> > > >> On Tue, Oct 15, 2013 at 7:02 PM, Kane Kane <kane.ist...@gmail.com> > > wrote: > > >> > I thought if i have all replicas in sync, leader change should be > much > > >> > faster? > > >> > > > >> > > > >> > On Tue, Oct 15, 2013 at 5:12 PM, Joel Koshy <jjkosh...@gmail.com> > > wrote: > > >> > > > >> >> Depending on how much data there is in those partitions it can > take a > > >> >> while for reassignment to actually complete. You will need to use > the > > >> >> --status-check-json-file option of the reassign partitions command > to > > >> >> determine whether partition reassignment has completed or not. > > >> >> > > >> >> Joel > > >> >> > > >> >> > > >> >> On Tue, Oct 15, 2013 at 3:46 PM, Kane Kane <kane.ist...@gmail.com> > > >> wrote: > > >> >> > I have 3 brokers and a topic with replication factor of 3. > > >> >> > Somehow all partitions ended up being on the same broker. > > >> >> > I've created topic with 3 brokers alive, and they didn't die > since > > >> then. > > >> >> > > > >> >> > Even when i try to reassign it: > > >> >> > bin/kafka-reassign-partitions.sh --zookeeper > > >> >> > 10.80.42.147:2181--broker-list 0,1,2 --topics-to-move-json-file > > >> >> > ~/reassign.txt --execute > > >> >> > > > >> >> > The leader of all partitions after that is still the single > broker > > >> (first > > >> >> > one). > > >> >> > This is how my json file looks like: > > >> >> > {"topics": > > >> >> > [{"topic": "perf1"}], > > >> >> > "version":1 > > >> >> > } > > >> >> > > > >> >> > The command reports success: > > >> >> > Successfully started reassignment of partitions Map([perf1,33] -> > > >> List(1, > > >> >> > 0, 2), [perf1,13] -> List(2, 0, 1), [perf1,28] -> List(2, 1, 0), > > >> >> [perf1,20] > > >> >> > -> List(0, 1, 2), [perf1,5] -> List(0, 2, 1), [perf1,14] -> > > List(0, 1, > > >> >> 2), > > >> >> > [perf1,39] -> List(1, 0, 2), [perf1,19] -> List(2, 0, 1), > > [perf1,25] > > >> -> > > >> >> > List(2, 0, 1), [perf1,43] -> List(2, 0, 1), [perf1,11] -> List(0, > > 2, > > >> 1), > > >> >> > [perf1,8] -> List(0, 1, 2), [perf1,22] -> List(2, 1, 0), > > [perf1,16] -> > > >> >> > List(2, 1, 0), [perf1,26] -> List(0, 1, 2), [perf1,41] -> List(0, > > 2, > > >> 1), > > >> >> > [perf1,9] -> List(1, 0, 2), [perf1,27] -> List(1, 0, 2), > > [perf1,44] -> > > >> >> > List(0, 1, 2), [perf1,34] -> List(2, 1, 0), [perf1,6] -> List(1, > 2, > > >> 0), > > >> >> > [perf1,1] -> List(2, 0, 1), [perf1,37] -> List(2, 0, 1), > > [perf1,24] -> > > >> >> > List(1, 2, 0), [perf1,29] -> List(0, 2, 1), [perf1,32] -> List(0, > > 1, > > >> 2), > > >> >> > [perf1,7] -> List(2, 0, 1), [perf1,17] -> List(0, 2, 1), > > [perf1,36] -> > > >> >> > List(1, 2, 0), [perf1,0] -> List(1, 2, 0), [perf1,42] -> List(1, > 2, > > >> 0), > > >> >> > [perf1,4] -> List(2, 1, 0), [perf1,10] -> List(2, 1, 0), > > [perf1,30] -> > > >> >> > List(1, 2, 0), [perf1,23] -> List(0, 2, 1), [perf1,18] -> List(1, > > 2, > > >> 0), > > >> >> > [perf1,3] -> List(1, 0, 2), [perf1,35] -> List(0, 2, 1), > > [perf1,31] -> > > >> >> > List(2, 0, 1), [perf1,12] -> List(1, 2, 0), [perf1,2] -> List(0, > 1, > > >> 2), > > >> >> > [perf1,40] -> List(2, 1, 0), [perf1,38] -> List(0, 1, 2), > > [perf1,15] > > >> -> > > >> >> > List(1, 0, 2), [perf1,21] -> List(1, 0, 2)) > > >> >> > > > >> >> > But still nothing changes. I use ~/kafka-src/bin/kafka-topics.sh > > >> >> > --zookeeper 10.80.42.147:2181 --describe --topic perf1 to check > > >> leaders. > > >> >> > > > >> >> > Thanks. > > >> >> > > >> > > >
