Rebalance failed. See logs for detailed reason. You can try rebalance again.

[blacksu...@gmail.com]

After adding a node to the cluster, I rebalanced the cluster.But after a few minutes,it failed with following logs:

Rebalance exited with reason {timeout,
{gen_server,call,
[ns_config,
{update_with_changes,
#Fun<ns_config.6.55748145>}]}}

I tried sevral times to rebalance,finally it finshed.

But why timeout?How can I sovle it?