Can not rebalance

Hello, please help!

I’m trying to rebalance to servers:

  1. Xeon® CPU E5-2650, 16 RAM, hdd 500GB, centos 6.5
  2. Xeon® CPU E5-2650, 32 RAM, hdd 500GB, centos 6.5
  • Total Allocated (9.77 GB)
  • Total in Cluster (9.77 GB)

This is what I get:
Rebalance exited with reason {unexpected_exit,

Same servers with ssd disks I can rebalance without any problem.
Please give me the link on good explanation.
Also I can not find any documentation about how to connect through https to couchbase web interface.

Thank you.