Hi Dimuthu, Are you using periodicalRebalance? That might trigger a rebalance periodically even if there's no activity in the cluster.
As for the ConcurrentModification exception, I believe there was a patch for that going from 0.8.2 to the latest on the upstream. Hunter On Mon, Nov 25, 2019 at 10:13 AM DImuthu Upeksha <dimuthu.upeks...@gmail.com> wrote: > Hi Folks, > > We have noticed a task in Helix cluster was running periodically even > though it was completed at each run. When we look at the logs of the > controller, I can see some Concurrent Modification exceptions [1]. However > this is a very rare occurrence. We have been using current Helix version > for few months on our production deployments but this is the first time we > have seen this behavior. > > Do you have any insight into this? > > We are using helix 0.8.2 > > [1] https://gist.github.com/DImuthuUpe/33db7bbe5d53fcc38dfc66eb0d45df55 > > Thanks > Dimuthu >
