[Spread-users] Question about unexpected spread behaviour

[Uma Chingunde]

Hi,

I have a Spread configuration between 2 hosts and I am seeing some weird
behavior between them.
Since the network does not support broadcast I have configured both hosts as
separate sites.

My spread.conf looks like this:
--------
Spread_Segment  x.x.x.255:4899 {

        uma-vm-1                x.x.x.105
}
Spread_Segment  x.x.x.255:4899 {

        uma-vm-2                x.x.x.106
}
---------------------

I have a test application that communicates using spread.
However at certain intervals the second daemon seems to partition away and
then re-merge when no network change has occurred.
I initially thought that the application was sending a wrong message to
spread that was causing the problem. However it doesn't seem to be the case.

The first daemon's log file (spread1.log) shows both daemons as always being
in the same partition.
The log files for the partitioned daemon (spread2.log) shows the segments
occasionally in different partitions.

The relevant snippets are below and the log files are attached.
Does anyone have an idea about why I am seeing such behavior?
I can't figure out why one daemon would see a network partition  differently
from the other, if such a partition was occurring which I am pretty sure in
this case is not.
Is there a configuration issue that I am missing somewhere?

Any help would be appreciated.
Thanks,
Uma

Log file snippet for first daemon
------------------------------------------
Conf_load_conf_file: My name: uma-vm-1, id: x.x.x.105, port: 4899
Membership id is ( 168918633, 1187811520)
--------------------
Configuration at uma-vm-1 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918633, 1187811620)
--------------------
Configuration at uma-vm-1 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918633, 1187811682)
--------------------
Configuration at uma-vm-1 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918633, 1187811800)
--------------------

Log file snippet for second daemon
---------------------------------------
Membership id is ( 168918633, 1187811520)
--------------------
Configuration at uma-vm-2 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918633, 1187811620)
--------------------
Configuration at uma-vm-2 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918634, 1187811665)
--------------------
Configuration at uma-vm-2 is:
Num Segments 2
    0    x.x.x.255     4899
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
Membership id is ( 168918633, 1187811682)
--------------------
Configuration at uma-vm-2 is:
Num Segments 2
    1    x.x.x.255     4899
        uma-vm-1                x.x.x.105
    1    x.x.x.255     4899
        uma-vm-2                x.x.x.106
====================
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