You won't lose data unless you have run nodetool cleanup on the existing nodes.
Rahul > On Mar 19, 2015, at 9:16 PM, Pranay Agarwal <agarwalpran...@gmail.com> wrote: > > Also, the new nodes (3 of them, in UJ state) are showing some data size > (~10g). Is there any data loss chances with stopping the cassandra on them? > >> On Thu, Mar 19, 2015 at 6:02 PM, Pranay Agarwal <agarwalpran...@gmail.com> >> wrote: >> Thanks Rob, You are right. I am using ReleaseVersion: 2.1.0 >> >> What do you mean by point 3? Also, by doing one at a time, does it mean wait >> till nodetool status of the new node is UN from UJ? >> >>> On Thu, Mar 19, 2015 at 5:44 PM, Robert Coli <rc...@eventbrite.com> wrote: >>>> On Thu, Mar 19, 2015 at 5:32 PM, Pranay Agarwal <agarwalpran...@gmail.com> >>>> wrote: >>>> I have 14 nodes cassandra cluster, each node as around 50gb of data. I >>>> added 3 new nodes to the cluster and I can see the status as UJ for the >>>> new nodes. They have been in that for almost a day now and their data size >>>> seems to be same as well. There is almost no CPU or disk usage either on >>>> them. >>> >>> It is not supported to add multiple nodes to a cluster simultaneously until >>> 2.1.1 [1]. Usually what happens is one or more of the bootstraps fails and >>> hangs forever. This seems to be what has happened to you. >>> >>> To resolve : >>> >>> 1) stop each of the bootstrapping nodes >>> 2) wipe their data directories completey >>> 3) verify that they do not show up in gossip on the other nodes >>> 4) bootstrap them again, one at a time >>> >>> =Rob >>> [1] https://issues.apache.org/jira/browse/CASSANDRA-7069 >
