Hi, I had an error last week, seemed to be RAM in Java that parked my install on the first node (where Kibana role was installed). Ever since then I cannot get the cluster back operational. When it is all restarted, all 4 nodes seem to communicate ok and report alive, some shards are not allocated…

What does your node configuration(s) look like?

Hi Christian, pasted below. # ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying…

It looks like all 4 nodes are master eligible. If that is the case you need to set discovery.zen.minimum_master_nodes to 3 in accordance with these guidelines in order to avoid split brain scenarios.

Thank you I will try that, and feedback to the guys that helped with this install.

Finally got a chance to try this, unfortunately it has not changed the status at all.... [image] minidan: root@SERVER root@SERVER:~# curl -XGET 'http://localhost:9200/_cluster/state?pretty' { "error" : { "root_cause" : [ { "type" : "master_not_discovered_exception", "reason" : nu…

Hold that thought... forgot to apply change to elasticsearch.yml on all nodes. WIll update if it has worked now corrected my mistake.

this has not worked.... suggestions for advanced troubleshooting appreciated

Can you telnet from one node to port 9300 on another? Is there any firewall rules that prevent the nodes from connecting? Is there anything in the Elasticsearch logs?

Look in the Elasticsearch logs, which should be located under /data/logs/elasticsearch based on your config above. Is there anything related to zen discovery there?

Elasticsearch cluster of 4 nodes has "master not discovered exception"

Elastic Stack Elasticsearch

minidan (mini dan) April 18, 2018, 11:26am 10

Hi, have checked this before but yes, can telnet from-to all on port 9300, no firewall rules (not changed since it was working).

Which log am I looking for?

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Elasticsearch cluster of 4 nodes has "master not discovered exception"

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