Re: [jgroups-users] Can probe be used to recover network splits?

HI Bela,
Thank you for your response. This is very helpful. I will try it out !!

The cluster does recover automatically with MERGE3. Only thing it took 6
hours in one case and 2 hours in other case to finally merge into 1
cluster. This is a cluster of 30 Nodes running with TCP as transport.
The nodes are geographically co-located across the globe.


On Thu, Mar 17, 2016 at 4:27 AM, JGroups - General mailing list [via
JGroups] <[email protected]> wrote:

> Hi Pooja,
>
> On 16/03/16 21:25, Questions/problems related to using JGroups wrote:
> > Hi ,
> >
> > Say if there is a split in the cluster and it is not recovering
> > automatically inspite of no network issues, has any one tried any probe
> > commands related to merge3 to heal the cluster automatically?
>
> There's a @ManagedOperation MERGE3.sendInfo() that can be triggered, so
> everyone in a cluster sends their information, allowing the coordinator
> to start a merge.
>
> However, this doesn't automatically merge the cluster, e.g. if everyone
> has the same view, then nothing will happen.
>
> If there is no network problem, and MERGE3 does *not* recover the
> cluster, then that would be a bug. In such a case, what would be
> required for diagnosis is:
> - TRACE logs for all members of GMS and MERGE3
> - Views of all members. This could be used for a reproducer
>
> I haven't yet come across a scenario with MERGE3 (*not* MERGE2!) that
> doesn't heal a network partition when the network is functioning ok again.
>
> > Thanks
> > Pooja
> >
> > ------------------------------------------------------------------------
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> > splits?
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> --
> Bela Ban, JGroups lead (http://www.jgroups.org)
>
>
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