Re: [jgroups-users] Reducing bandwidth usage

You need to use the version of ParseMessages that's from the JGroups JAR 
(same version). Do you have a (small) PCAP file you could send me to 
take a look? I'd also need the exact version of JGroups you use.

On 01.04.20 20:46, Questions/problems related to using JGroups wrote:
> Regarding packet decoding, i followed the guide from the blog but got an 
> exception from jgroups.
> ArrayIndexOutOfBoundsException -30598 called from
> conf.ClassConfigurator.create like 129
> Message.readHeader(Message 836)
> Message.readFrom(Message:709)
> ....
> 
> Since I'm using a slightly different udp config file, do i need to pass 
> that in as an argument to the ParseMessages's class?
> //
> 
> 
> 
> On Wed, Apr 1, 2020 at 10:01 AM Questions/problems related to using 
> JGroups <[email protected] 
> <mailto:[email protected]>> wrote:
> 
> 
> 
>     On 01.04.20 15:53, Questions/problems related to using JGroups wrote:
>      > I'm using a slightly modified version of "udp.xml" that basically
>      > increases some of the timeouts. I've been wiresharking some of the
>      > traffic to get an idea of bandwidth usage and consumption.
>      >
>      > a) is there a supported wireshark plugin to help decode the jgroups
>      > messages?
> 
>     There used to be one (written in C), but because the wire format kept
>     changing, we decided it was better to use the actual parsing code to
>     implement a PCAP/NG parser. See [1] for details.
> 
>      > b) I'm noticing about 3-4 packets send per second to/from 2 nodes
>     with
>      > some bursts to 7 packets. Is there a way to tell what these
>     messages are?
> 
>     Yes, use [1] to display the messages.
> 
>     I suspect most of the traffic is from a heartbeat protocol (FD_ALL) or
>     stability (STABLE)
> 
>      > c) regarding (b), is there a way to reduce the chatter?
> 
>     Depending on what the messages are, yes, by increasing timeouts (e.g.)
>     in FD_ALL.
> 
> 
>     [1] http://belaban.blogspot.com/2019/06/network-sniffing.html
> 
> 
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>      >
> 
>     -- 
>     Bela Ban | http://www.jgroups.org
> 
> 
> 
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-- 
Bela Ban | http://www.jgroups.org