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

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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