Package: x2goserver Version: Devuan Beowulf package x2goserver/stable,now 4.1.0.3-4

Dear sirs, I'm currently employing x2go (Devuan Beowulf package x2goserver/stable,now 4.1.0.3-4) to operate a terminal server for computer lab lessons.

It randomly happens that some of the students experience sequences of failed connection attempts (usually 5-10 in a row) with the following kind of error (typed from a typical screenshot)

[...] n283287-55-1616084795_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. : /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper insertsession 55 x2go-cdm [...] n283287-55-1616084798_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. : /usr/lib/x2go/libx2go-server-db-sqlite3-wrapper insertsession 55 x2go-cdm n283287-55-1616084799_stDmwm_dp32 at /usr/share/perl5/X2Go/Server/DB.pm line 251. Unable to find free display port or insert new sessions into database; parameters: port(55), hostname (x2go-cdm) and session name (n283287-55-1616084799_stDmwm_dp32).

A further, subsequent connection attempt randomly succeeds instead. At the same time, other students experience regular login procedures.

The student passwd data is taken from a "sssd-ldap" domain, fact this that might cause some of the quirks.

Please indicate me which further data on the server side might be relevant for investigating the problem.

Thanks.

-- Enrico Bertocchi