[DRBD-user] Treason uncloaked messages

[andreas.unterluggauer at orf.at]

hi!

I am seeing following messages (with dmesg) during a full sync of my
drbd-devices:
TCP: Treason uncloaked! Peer 192.168.2.108:7789/36527 shrinks window
4221788818:4221790266. Repaired.
TCP: Treason uncloaked! Peer 192.168.2.108:7789/36527 shrinks window
71412338:71413786. Repaired.
TCP: Treason uncloaked! Peer 192.168.2.108:7789/36527 shrinks window
83758738:83761634. Repaired.

my configuration: drbd 0.7.5 on redhat 7.3, kernel
"2.4.20-30.7.legacycustom  SMP".
the two servers are connected with a crossover cable on eth1. 

google gives me following explanation for this message:
"The remote host decided to shrink the TCP window size without
negotiating such with your Linux box. The message is of the
informational level, meaning Linux doesn't like what it is seeing but
will cope with it and carry on."

so I think it's nothing critical, am I correct?

thanks
andi


here is my drbd.conf:
global {
    minor-count 5;
}

resource statictext {
    protocol               C;
    on haiti {
        device           /dev/drbd0;
        disk             /dev/sda1;
        address          192.168.2.109:7788;
        meta-disk        internal;
    }
    on tahiti {
        device           /dev/drbd0;
        disk             /dev/sda1;
        address          192.168.2.108:7788;
        meta-disk        internal;
    }
    net {
        timeout           60;
        connect-int       10;
        ping-int          10;
        ko-count           4;
    }
    disk {
        on-io-error      panic;
    }
    syncer {
        rate             500M;
        group              1;
        al-extents       127;
    }
    startup {
        wfc-timeout        1;
        degr-wfc-timeout   1;
    }
}

resource multimedia {
    protocol               C;
    on haiti {
        device           /dev/drbd1;
        disk             /dev/sda2;
        address          192.168.2.109:7789;
        meta-disk        internal;
    }
    on tahiti {
        device           /dev/drbd1;
        disk             /dev/sda2;
        address          192.168.2.108:7789;
        meta-disk        internal;
    }
    net {
        timeout           60;
        connect-int       10;
        ping-int          10;
        ko-count           4;
    }
    disk {
        on-io-error      panic;
    }
    syncer {
        rate             500M;
        group              1;
        al-extents       127;
    }
    startup {
        wfc-timeout        1;
        degr-wfc-timeout   1;
    }
}