On Apr 27, 2012, at 9:54 AM, ravi wrote: > Hey Mark, Thanks again for your reply. > > /*"The way we know that its no longer connected to zookeeper is looking at > live_nodes - which are ephemeral and will go away if a node goes away"*/ > > i am not too sure if this is really the case. As far as i remember, even > after a node was dead, live_nodes still reported that node as active /but/ > the leader was changed to the one that was /really/ alive.
Should not be the case. > > I had a look in the Overseer's code and it seems its looping on FIFO queue > and wait for new state update requests. So if a node was killed, it would > never be sending a state update request and i guess that's why the state is > out of sync. > > If we can set up a wait time for each known node and then declare a node as > INACTIVE if overseer does not hear from that node within the wait time. > Something similar to heartbeats in several other systems. The /live_nodes stuff does use a heartbeat. That's why we use it as we do in combination with the state. > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/SolrCloud-Programmatically-create-multiple-collections-tp3916927p3944327.html > Sent from the Solr - User mailing list archive at Nabble.com. - Mark Miller lucidimagination.com
