20 Jul 2023 04:23 AM - edited 20 Jul 2023 04:26 AM
Hi Dynatrace community,
We need your help on how to fix the MasterNotDiscoveredException on ElasticSearch. Please see attached.
We are using Dynatrace Managed 1.268.145 with 3 cluster nodes.
The scenario yesterday, I updated the /etc/fstab to keep the EFS mount then performed the Stop/Start of instance.
The Dynatrace Server failed with the error MasterNotDiscoveredException.
Then using ElasticSearch Health Check returned MasterNotDiscoveredException.
The command is : curl <ip_address>:9200/_cluster/health
Regards,
Abner
Solved! Go to Solution.
20 Jul 2023 07:45 AM
Usually this might indicate some network problems between cluster nodes. At the beginning try to perform a rolling restart of nodes. If that doesn't help - please investigate elasticsearch logs or contact our Dynatrace support team.