Hello Michael,
On 10/27/2011 04:37 AM, Michael Raab wrote:
> I think I have somehow understood the problem now. It has two main aspects:
> network communication and changelist based synchronisation.
>
> With StreamSock enabled, the communication seems to work well but the sync
> for latter arriving servers went wrong. The issue was that the completeState
> changelist I created before doing the sync contains everything except the
> type mapping (NEWTYPE fields) definitions as they are only generated once. I
> was able to fix that. Patch for RemoteAspect is attached.
> Now everything seems to run fine as long as I use StreamSock.
hmm, although the already connected servers receive all changes a second
time.
> With Multicast enabled, it seems communication between client and late
> arriving server is not initialized well. Looking at the code in
> OSGGroupMcastConnection the reason seems to be clear. Method initialize() is
> only called once, before the first message is send over the connection. That
> means server1 is respected by initialization, latter ariving servers not. I
> tried to move the server specific initialization code into the connectPoint()
> implementation but unfortunately failed to understand the logic behind the
> acknoledgement handling :-( (Lines 644-670). Hope someone may help to split
> the initlization into a general and a server(socket) specific part.
yes, that part is definitely not built for end points joining the
connection after the first write. Looking at the code a bit it seems to
me that most of the code from initialize could move to
GroupMCastConnection::connectPoint(). To be honest I don't quite
understand "ack" handling either at this point, but mostly I'm wondering
if it ever was used with ackNum != 1? I'm somewhat tempted to assume
ackNum == 1 and just drop the other code paths. It may take me a couple
of days before I can get around to trying this - in case you want to
give it another try.
How dynamic do you expect the server connect/disconnect to be for your
application? Would it be easier to create a new GroupConnection and
RemoteAspect when the number of servers changes?
Can you give is some background information on your application?
Cheers,
Carsten
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