Life after the panic protocol

We have 2 servers that run on GridGain containing Coherence distributed caches (version 3.4.1). The nodes in both servers are used for processing events. Those events are stored in the cache.
When the network connection between server A and B fails, each one will continue in its own cluster island. Once the connection is established, Coherence will first log a message like the following:
10 Mar 2009 10:07:32,748 [Logger@9257178 3.4.1/407] WARN Coherence - 2009-03-10 10:07:32.747/88550.631 Oracle Coherence GE 3.4.1/407 <Warning> (thread=Cluster, member=1): The member formerly known as Member(Id=6, Timestamp=2009-03-10 09:07:40.389, Address=192.168.1.7:8088, MachineId=40455, Location=process:29423, Role=ServerMain) has been forcefully evicted from the cluster, but continues to emit a cluster heartbeat; henceforth, the member will be shunned and its messages will be ignored.
and half a minute later it will log the following:
10 Mar 2009 10:08:02,803 [Logger@9257178 3.4.1/407] WARN Coherence - 2009-03-10 10:08:02.803/88580.687 Oracle Coherence GE 3.4.1/407 <Warning> (thread=Cluster, member=1): An existence of a cluster island with senior Member(Id=6, Timestamp=2009-03-10 09:02:07.28, Address=192.168.1.7:8088, MachineId=40455, Location=process:29423, Role=ServerMain) containing 5 nodes have been detected. Since this Member(Id=1, Timestamp=2009-03-09 09:31:52.149, Address=192.168.1.6:8088, MachineId=40454, Location=process:6853, Role=ServerMain) is the senior of an older cluster island, the panic protocol is being activated to stop the other island's senior and all junior nodes that belong to it.
All this makes sense. However there's about 30 seconds between the time the network connection was reestablished and the time the cache from the "bad" cluster island was restarted. During those 30 seconds we are already assuming that the nodes from the "bad" cluster island can be used for processing, so events are already added to the cache on the nodes of the "bad" cluster. After the panic protocol the caches are restarted and the events that were added in those last 30 seconds are gone.
There are two solutions that come to my mind.
1. We make sure that we don't consider those rejoined nodes for processing events untill after the panic protocol is resolved. Could we use a MemberListener for that? Will we only get a MemberListener.memberJoined() after the panic protocol is executed?
2. We already use those rejoined nodes for event processing, but we restart any event processing once we get notified of the occurence of the panic protocol. Is there a way we can listen for such an event indicating the cluster has been restarted?
Best regards
Jan

Hi, the problem is we don't know in advance how many members the cluster will contain or even how many nodes each server will contain or how many servers there will be in the cluster. So stopping event processing when the amount of members in the cluster drop to a certain level won't work.
However we could keep a list of the servers that aren't available anymore and when the connection is reestablished, wait for the members to reappear in the cluster before considering them for event processing.

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Install the free NVBackup to your 680. This program is a real life-saver and has saved my butt many times!
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Hi all, this is just an update on some of the things I have resolved from my original post 1) Unfortunately the restarts are still happening, usually when the phone is idle for a period of time (around 2-3 hours) yet it doesn't crash or reset when in use. From what I can gather some people believe it to be hardware (sent it back) and some think it is software (wait for update). but this restarting never happened like this before the Anna Update. phonehacker has recently posted this which i'll try tonight Thanks /t5/Pool-of-Knowledge/My-C7-restarts-very-often-What-should-I-do/td-p/1014817 2) I have resolved the missing images from 'photos' issue - After Anna update I moved all my pictures from the Pictures (on memory card) folder to the Images folder (the one where camera pics are stored, still on the memory card) and now they all appear in the photos app. 3) No news on the music update (allowing editing) but I hear this is an issue with all S^3 devices, so patients is needed for this one. 4) I can still purchase on the OVI store as long as I am connected via WiFi, but not through 3G, any ideas? 5) I hear it is a given that the extra screensavers have been removed Hope some of this helps, or that someone can resolve my restarting issues. Thanks all ***edited this three times and for some reason spaces are not appearing, sorry for the way it reads

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Life after the panic protocol

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