Thanks for reply.

During the restoration of database my cache system is in "exclusive mode", because I answered "Yes" on step:

Do you want to set switch 10 so that other processes will be
prevented from running during the restore? Yes =>
 

thus i'am unable to connect to database

[cacheusr@*******]$ csession cache
Access to database inhibited.  Press Ctrl/C to exit.
Next time I'll chose "No" and try your solution.