Re: [javagroups-users] Unable to recognise new member as part of group

[Bela B. <be...@nm...>]

Jayna Tan wrote:

> I adapted the DistributedHashtableDemo to a non-gui
> version and got it working on 2 machines( machine A
> and B). There is no problem with getting machine A and
> C to work together either. but I have a problem with
> getting the same demo to work on another pair of
> machine( machine C and D). It seems that neither
> machines(C and D) recognise each other as part of a
> group(I checked the view from the channel).
>
> At first I suspected I tested whether the machines had
> IP multicast ability by running
> org.javagroups.tests.McastSenderTest on machine C and
> org.javagroups.tests.McastReceiverTest on machine D.
> All input sent by the sender class are received by the
> receiver class if ttl = 32.
>
>
>I am puzzled.
>


What version of JavaGroups were you using ? You best bet is to look at 
the 2 members that don't work (C and D) and see why this is so. Try the 
following:

1. Get the latest JavaGroups (2.0.1) from SourceForge and try again
2. Set the bind_addr property in UDP to the interface you use. This is 
especially important is you have multiple NICs
3. Enable tracing: set the contents of javagroups.properties to

trace=true
timestamp_format=HH:mm:ss[SSS]
default_output=WARN /tmp/trace.all

Start C and then start D. There should be some indication in the trace 
file where they don't find each other.
Hope this helps,

-- 
Bela Ban
Fujitsu Network Communications
(408) 895-1732