Rudder

The issue is in

[debug] Running FusionInventory::Agent::Task::Inventory::Linux::Drives
[debug2] executing df -P -T -k

setting up a nfs share, and shutting down the nfs server exhibit it.
there's already a timeout, set by "alarm", using --backend-collect-timeout (defaut 180s) , but it fails in this case
alarm doesn't seem to work with filehandle correctly in non interactiv script (see https://perldoc.perl.org/functions/alarm.html and https://www.perlmonks.org/?node_id=999179 )

changing getFileHandle in Tools.pm, in case of command with the following doesn't solves the issue

            eval {
              local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required
              alarm 5;
              if (!open $handle, '-|', $params{command} . " 2>$nowhere") {
                  $params{logger}->error(
                         "Can't run command $params{command}: $ERRNO" 
                 ) if $params{logger};
                 return;
                                                                                    }

            };

actually, this returns, but it's after that it locks, during the my $line = <$handle>;

doing

my $line;
    # get headers line first
        eval {
           local $SIG{ALRM} = sub { die "alarm\n" }; # NB: \n required
           alarm 5;
           $line = <$handle>;
        };

allows to get to the next step, however it still locks, and command doesn't end - probably the handle is not released

an easier solution coulf be to check it timeout is present on the system, and if so, run "timeout 5 df" , and if not, don't use timeout