I can't restart Vertica database

I have database in Vertica on 4 nodes (RedHat OS). It was working until I decided to restart my DB. After nodes were shut down, they can't be UP anymore. I try to start DB via adminTools: nodes are starting to initialize, but then they shut down. Using last good epoch or admintools -t start_db with --force key don't help. In logs (dbLog, vertica.log) I see only one type of error: SP_connect: unable to connect via UNIX socket to /tmp/4803 (pid=12533): Error: Connection Refused. It is enough space in /tmp and iptables service is disabled. Also I tried to create new database, so it was created and worked well.