[Spread-users] How to detect if a Spread node fails
jschultz at spreadconcepts.com
Wed Jul 13 13:45:23 EDT 2011
You don't get a leave message but you do get a caused by network membership change message. I'm saying you have to remember what the previous membership was, inspect the new membership and notice that the *#able guys are no longer there.
John Lane Schultz
Spread Concepts LLC
Phn: 301 830 8100
Cell: 443 838 2200
On Jul 13, 2011, at 1:03 PM, Andrew Holt wrote:
The interesting thing is I don’t get an leave messages.
To use my example I kill spread on node able and I get join messages for
I presume this is caused by the spread network reforming around the failed node.
If I got leave messages for:
That would be fine.
On 13 Jul 2011, at 17:20, John Schultz wrote:
> Have at least one process per daemon join the groups in which you are interested in tracking. Track the membership of the group. If you see a caused by network where all the *#able members leave, then its a good bet that daemon has either crashed or partitioned away.
> If that's not good enough then you might be able to administratively, through code changes, get a report of the actual daemon membership which can tell you if able is in the daemon membership or not.
> John Lane Schultz
> Spread Concepts LLC
> Phn: 301 830 8100
> Cell: 443 838 2200
> On Jul 13, 2011, at 11:27 AM, Andrew Holt wrote:
> I have two machines each running the spread server, and each setup so they know about each other. Let’s call them able & baker.
> I have a number of clients programs, in the same group on each
> If spread dies, is killed or a machine dies how can I detect that the node has gone ‘offline’ ?
> baker receives a message of the type Is_caused_network_mess for each group. What I need is to know the source is 'able’
> Any hints ?
> Andrew Holt
> Email: andrew.holt at 4asolutions.co.uk
> De Omnibus Dubitandum
> Spread-users mailing list
> Spread-users at lists.spread.org
Email: andrew.holt at 4asolutions.co.uk
De Omnibus Dubitandum
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