# Updating "discovery.zen.minimum\_master\_nodes": new value ignored? **URL:** \ **Category:** Elasticsearch\ **Created:** [July 24, 2013, 7:19pm UTC](https://discuss.elastic.co/t/updating-discovery-zen-minimum-master-nodes-new-value-ignored/12924 "2013-07-24T19:19:34Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![nekoc](https://avatars.discourse-cdn.com/v4/letter/n/fbc32d/32.png) [@nekoc](https://discuss.elastic.co/u/nekoc)\ **Post date:** [July 24, 2013, 7:19pm UTC](https://discuss.elastic.co/t/updating-discovery-zen-minimum-master-nodes-new-value-ignored/12924/1 "2013-07-24T19:19:34Z")
Hello. I was expecting changing "discovery.zen.minimum\_master\_nodes" value will take effect immediately upon request submission (using [http://host:9200/\_cluster/settings](http://host:9200/_cluster/settings) call) but it doesn't seem to work work in such a way. Elasticsearch Version 0.90.2 Cluster setting: 4 nodes (all master-eligible) Steps: 1. Start all nodes with discovery.zen.minimum\_master\_nodes = 3 in elasticsearch.yml 2. Execute curl -X PUT [http://node1:9200/\_cluster/settings](http://node1:9200/_cluster/settings) -d '{ "transient" : { "discovery.zen.minimum\_master\_nodes" : 2 } }' and validate that change in response that value was set. 3. Execute curl -X PUT [http://node2:9200/\_cluster/settings](http://node2:9200/_cluster/settings) -d '{ "transient" : { "discovery.zen.minimum\_master\_nodes" : 2 } }' and validate that change in response that value was set. 4. Observe the update request accepted by node1 and node2 in elasticsearch.log (as: [discovery.zen] [node1] updating discovery.zen.minimum\_master\_nodes from [3] to [2]) 5. Shutdown node3 and node4 (leaving node1 and node2 up). I was expecting that given node1 and node2 now have minimum\_master\_nodes set to 2 BEFORE node3 and node4 were shutdown, node1 and node2 will continue to operate by electing either node1 or node2 as the new master. However, what I see in the log file is "not enough master nodes after master left (reason = shut\_down), current\_nodes: {[node1]...,[node2]...,,}". Am I misunderstanding how this supposed to work? Using "persistent" or "transient" make no difference... Your assistance/feedback is greatly appreciated. Thank you very much. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:24am UTC](https://discuss.elastic.co/t/updating-discovery-zen-minimum-master-nodes-new-value-ignored/12924/2 "2017-07-06T02:24:41Z")