Technically, you want to make sure zookeeper reports the node as live and active.
You could use the same api that the UI uses for that - the localhost:port/solr/zookeeper (I think?) servlet. If you can't reach it for a node, it's obviously down - if you can reach it, parse the json and see if it notes the node as active? Not quite as clean as you'd like prob. Might be worth a JIRA issue to look at further options. - Mark On Jan 3, 2013, at 5:54 PM, Bill Au <bill.w...@gmail.com> wrote: > Thanks, Mark. > > That does remove the node. And it seems to do so permanently. Even when I > restart Solr after unloading, it does not join the SolrCloud cluster. And > I can get it to re-join the cluster by creating the core. > > Anyone know if there is an API to determine the state of a node. When AWS > auto scaling add a new node, I need to make sure it has before active > before I enable it in the load balancer. > > Bill > > > > > On Thu, Jan 3, 2013 at 9:10 AM, Mark Miller <markrmil...@gmail.com> wrote: > >> >> http://wiki.apache.org/solr/CoreAdmin#UNLOAD >> >> - Mark >> >> On Jan 3, 2013, at 9:06 AM, Bill Au <bill.w...@gmail.com> wrote: >> >>> Mark, >>> What do you mean by "unload them"? >>> >>> I am using an AWS load balancer with my auto scaling group in stead of >>> using Solr's built-in load balancer. I am no sharding my index. I am >>> using SolrCloud for replication only. I am doing local search on each >>> instance and sending all updates to the shard leader directly because I >>> want to minimize traffic between nodes during search and update >>> >>> Bill >>> >>> >>> On Wed, Jan 2, 2013 at 6:47 PM, Mark Miller <markrmil...@gmail.com> >> wrote: >>> >>>> >>>> On Jan 2, 2013, at 5:51 PM, Bill Au <bill.w...@gmail.com> wrote: >>>> >>>>> Is anyone running Solr 4.0 SolrCloud with AWS auto scaling? >>>>> >>>>> My concern is that as AWS auto scaling add and remove instances to >>>>> SolrCloud, the number of nodes in SolrCloud Zookeeper config will grow >>>>> indefinitely as removed instances will never be used again. AWS auto >>>>> scaling will keep on adding new instances, and there is no way to >> remove >>>>> them from Zookeeper, right? >>>> >>>> You can unload them and that removes them. >>>> >>>>> What's the effect of have all these phantom >>>>> nodes? >>>> >>>> Unless they are only replicas, they would need to be removed. >>>> >>>> Also, unless you are using elastic ips, >>>> https://issues.apache.org/jira/browse/SOLR-4078 may be of interest. >>>> >>>> - Mark >> >>
