Re: [jgroups-users] Reducing bandwidth usage

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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]> 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
>
>
> > javagroups-users mailing list
> > [email protected]
> > https://lists.sourceforge.net/lists/listinfo/javagroups-users
> >
>
> --
> Bela Ban | http://www.jgroups.org
>
>
>
> _______________________________________________
> javagroups-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/javagroups-users
>

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<div dir=3D"ltr"><div>Regarding packet decoding, i followed the guide from =
the blog but got an exception from jgroups.</div><div>ArrayIndexOutOfBounds=
Exception -30598 called from <br></div><div>conf.ClassConfigurator.create l=
ike 129</div><div>Message.readHeader(Message 836)</div><div>Message.readFro=
m(Message:709)</div><div>....</div><div><br></div><div>Since I&#39;m using =
a slightly different udp config file, do i need to pass that in as an argum=
ent to the ParseMessages&#39;s class?</div><div><i></i><br></div><div><br><=
/div><div><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Wed, Apr 1, 2020 at 10:01 AM Questions/problems rela=
ted to using JGroups &lt;<a href=3D"mailto:[email protected]=
ge.net">[email protected]</a>&gt; wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
On 01.04.20 15:53, Questions/problems related to using JGroups wrote:<br>
&gt; I&#39;m using a slightly modified version of &quot;udp.xml&quot; that =
basically <br>
&gt; increases some of the timeouts. I&#39;ve been wiresharking some of the=
 <br>
&gt; traffic to get an idea of bandwidth usage and consumption.<br>
&gt; <br>
&gt; a) is there a supported wireshark plugin to help decode the jgroups <b=
r>
&gt; messages?<br>
<br>
There used to be one (written in C), but because the wire format kept <br>
changing, we decided it was better to use the actual parsing code to <br>
implement a PCAP/NG parser. See [1] for details.<br>
<br>
&gt; b) I&#39;m noticing about 3-4 packets send per second to/from 2 nodes =
with <br>
&gt; some bursts to 7 packets. Is there a way to tell what these messages a=
re?<br>
<br>
Yes, use [1] to display the messages.<br>
<br>
I suspect most of the traffic is from a heartbeat protocol (FD_ALL) or <br>
stability (STABLE)<br>
<br>
&gt; c) regarding (b), is there a way to reduce the chatter?<br>
<br>
Depending on what the messages are, yes, by increasing timeouts (e.g.) <br>
in FD_ALL.<br>
<br>
<br>
[1] <a href=3D"http://belaban.blogspot.com/2019/06/network-sniffing.html" r=
el=3D"noreferrer" target=3D"_blank">http://belaban.blogspot.com/2019/06/net=
work-sniffing.html</a><br>
<br>
<br>
&gt; javagroups-users mailing list<br>
&gt; <a href=3D"mailto:[email protected]" target=3D"_b=
lank">[email protected]</a><br>
&gt; <a href=3D"https://lists.sourceforge.net/lists/listinfo/javagroups-use=
rs" rel=3D"noreferrer" target=3D"_blank">https://lists.sourceforge.net/list=
s/listinfo/javagroups-users</a><br>
&gt; <br>
<br>
-- <br>
Bela Ban | <a href=3D"http://www.jgroups.org" rel=3D"noreferrer" target=3D"=
_blank">http://www.jgroups.org</a><br>
<br>
<br>
<br>
_______________________________________________<br>
javagroups-users mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank"=
>[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/javagroups-users" r=
el=3D"noreferrer" target=3D"_blank">https://lists.sourceforge.net/lists/lis=
tinfo/javagroups-users</a><br>
</blockquote></div>

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