When thinking about it, I failed to see how upgrading the servers can help me
If I understand correctly, I should remove the second node, the one which I fail to add using rebalance, upgrade it, add it and then rebalance again.
But I can’t rebalance ! This is the problem.
Something probably is corrupted with the first node and this is why I cannot rebalance.
I cannot even back it up completely as cbbackup also gets stuck in the middle of a specific bucket.
The only bad solution I can think about is to remove the only good node (the first one), creating a downtime for maintenance for few hours, upgrade it and pray that when it will wake up, all the data will be saved.
But, how can I upgrade the last and only node in a cluster. Obviously I cannot remove it as if I will, there will be no cluster.
@cihangirb, what is going on here ?
Is there a way to remove only the bad docs that blocks rebalance and backup ?