On 7/27/2015 6:17 AM, Modassar Ather wrote: > Kindly help me understand following with respect to Solr version 5.2.1. > > 1. What happens to the solr cluster if the standalone external zookeeper is > stopped/restarted with some changes done in zoo_data during the restart? > E.g After restarting the zookeeper the solr configs are reloaded with > changes. Please note that solr cluster is not restarted. > 2. In what conditions of zookeeper restart the solr nodes are required to > be restarted?
If zookeeper loses quorum, SolrCloud goes read-only. Updates won't be possible until zookeeper has quorum again. If zookeeper goes away completely, I think the result might be the same, but I do not know. For changes in zookeeper related to core configuration, simply reloading affected collections with the Collections API is enough. For more extensive changes, especially to things like the clusterstate, restarting all Solr nodes might be required. If you give us specifics about what you want to change, we can figure out exactly what actions are needed. Thanks, Shawn
