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No connection to PANDION

Hello. The guys are faced with a problem, there is a server winserv2008r2, on which the openfire base is deployed, as well as clients that connect Pandionom to it.
There are many users in the database, some of them are connected normally, and some write (not a valid login or password). Tried to re-create users, the result is identical. Those. on some computers I can go under any user. and for some, I can not go at all (considering that there are users in the database).

The error is
2018.05.22 10:46:16 WARN [socket_c2s-thread-4]: org.jivesoftware.util.cache.DefaultCache - Cache Roster was full, shrinked to 90% in 0ms.
2018.05.22 10:48:08 WARN [socket_c2s-thread-3]: org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to exception in session: (0x00000055: nio socket, server, / => /