Answer by Jose Miguel Arigita for Redis - after network error, all redis-servers are setted like slave and never master is eleteced anymore because -failover-abort-no-good-slave

Sorry, checking the installation we realized that there were other group of sentinels monitoring the master, from older version not removed.

So with the data exposed in the question everything is ok, there is no problem.

But , because of an instalation error, there are two groups of sentinels with different name in sentinel monitor "sentinel monitor coremaster ip 6382 3"

each group of sentinels command a different thing, and the result is that all nodes are slave and no master.