Matas,  Take a look at this KB: [URL]  It outlines what you are seeing. Essentially, you have something that is logging in/out too many times, too quickly, and that is filling up the login table. If you can find and figure out what is causing the login table to fill up, that should do it. Look at your events on the Master MDM as a clue (/opt/emc/scaleio/mdm/bin/showevents.py -p |grep "Command login ").  Hope that helps, Rick
Hello,  I have cluster running sw version:  Version: 2.0.7120  And I want to upgrade to latest sw version. however command scli --start_upgrade fails .  # scli --login --username admin --password ******* Logged in. User role is SuperUser. System ID is 7f16affdg085ea76c ]# scli --query_cluster Cluster:     Mode: 5_node, State: Normal, Active: 5/5, Replicas: 3/3 Master MDM:     ID: 0x7e272f9f63f5e210         IPs: 10.22.26.11, Management IPs: 10.22.26.11, Port: 9011         Version: 2.0.7120 Slave MDMs:     ID: 0x0fa334e15156abe2         IPs: 10.22.26.13, Management IPs: 10.22.26.13, Port: 9011         Status: Normal, Version: 2.0.7120     ID: 0x5cbaf3001f4f1801         IPs: 10.22.26.12, Management IPs: 10.22.26.12, Port: 9011         Status: Normal, Version: 2.0.7120 Tie-Breakers:     ID: 0x6beff5195f712f54         IPs: 10.22.26.32, Port: 9011         Status: Normal, Version: 2.0.7120     ID: 0x197422174da8d613         IPs: 10.22.26.31, Port: 9011         Status: Normal, Version: 2.0.7120  # scli --start_upgrade This command should only be used when intending to upgrade the entire system to a new product version. Press 'y' and then Enter to confirm.y   Error: MDM failed command.  Status: Invalid session. Please login and try again.  Also,  commands like:  # scli --query_user --username admin Error: MDM failed command.  Status: Invalid session. Please login and try again.  # scli --query_all Error: MDM failed command.  Status: Invalid session. Please login and try again.  fails also. Any ideas ?  ScaleIO was deployed in version: Version: 2.0.7120
Scaleio command: scli --start_upgrade fails