# Elasticsearch cluster UUID is not available after version upgrade **URL:** \ **Category:** Elasticsearch\ **Created:** [January 14, 2022, 7:26pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441 "2022-01-14T19:26:01Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![learning\_fun](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/learning_fun/32/100343_2.png) [@learning\_fun](https://discuss.elastic.co/u/learning_fun)\ **Post date:** [January 14, 2022, 7:26pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/1 "2022-01-14T19:26:01Z")
Hi There, we use only Elasticsearch and upgraded it from 6.7.0 to 7.16.2 . we run the Elasticsearch in kubernetes and after version upgrade, cluster UUID is not available. We have one master node , 3 data nodes, 1 coordinating node and cluster UUID is not available across all the nodes. Can i please know how to generate the cluster UUID. ```auto "name" : "es-master", "cluster_name" : "apache", "cluster_uuid" : "_na_", "version" : { "number" : "7.16.2", "build_flavor" : "default", "build_type" : "tar", ``` I found below log messages on master node, co-ordinating node, data logs but all these pods are deployed in same namespace and not sure what is causing the connection refused error . Is this the reason the cluster UUID is not available ? es-master logs: `[2022-01-14T20:04:21,048][WARN][o.e.d.PeerFinder] [es-master] address [192.168.168.222:9300], node [null], requesting [false] connection failed: [gbi-es-coordinating][100.102.196.190:9300] non-master-eligible node found` es-coordinating logs: `[2022-01-14T20:05:54,078][WARN][o.e.d.PeerFinder] [gbi-es-coordinating] address [192.168.198.238:9300], node [null], requesting [false] connection failed: [es-data][100.105.252.18:9300] non-master-eligible node found` es-data logs: ```auto [2022-01-14T20:06:56,510][WARN][o.e.d.PeerFinder] [es-data] address [192.168.168.222:9300], node [null], requesting [false] connection failed: [gbi-es-coordinating][100.102.196.190:9300] non-master-eligible node found bash-4.2# ``` Thanks ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [January 14, 2022, 9:35pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/2 "2022-01-14T21:35:09Z")
The logs you shared aren't helpful, but there will be other logs that do help. I suggest you share a more complete set of logs. ---
**Author:** ![learning\_fun](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/learning_fun/32/100343_2.png) [@learning\_fun](https://discuss.elastic.co/u/learning_fun)\ **Post date:** [January 14, 2022, 11:18pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/3 "2022-01-14T23:18:15Z")
```auto [2022-01-14T23:17:24,743][WARN][o.e.d.PeerFinder] [es-master] address [192.168.62.148:9300], node [null], requesting [false] connection failed: [es-master][100.106.199.189:9300] local node found [2022-01-14T23:17:24,745][WARN][o.e.d.PeerFinder] [es-master] address [192.168.147.53:9300], node [null], requesting [false] connection failed: [gbi-es-coordinating][100.106.26.195:9300] non-master-eligible node found [2022-01-14T23:17:24,748][WARN][o.e.d.PeerFinder] [es-master] address [192.168.240.43:9300], node [null], requesting [false] connection failed: [es-data][100.102.196.179:9300] non-master-eligible node found [2022-01-14T23:17:25,745][WARN][o.e.d.PeerFinder] [es-master] address [192.168.62.148:9300], node [null], requesting [false] connection failed: [es-master][100.106.199.189:9300] local node found [2022-01-14T23:17:25,745][WARN][o.e.d.PeerFinder] [es-master] address [192.168.147.53:9300], node [null], requesting [false] connection failed: [gbi-es-coordinating][100.106.26.195:9300] non-master-eligible node found [2022-01-14T23:17:25,749][WARN][o.e.d.PeerFinder] [es-master] address [192.168.240.43:9300], node [null], requesting [false] connection failed: [es-data][100.102.43.114:9300] non-master-eligible node found [2022-01-14T23:17:26,744][WARN][o.e.d.PeerFinder] [es-master] address [192.168.62.148:9300], node [null], requesting [false] connection failed: [es-master][100.106.199.189:9300] local node found [2022-01-14T23:17:26,746][WARN][o.e.d.PeerFinder] [es-master] address [192.168.147.53:9300], node [null], requesting [false] connection failed: [gbi-es-coordinating][100.106.26.195:9300] non-master-eligible node found [2022-01-14T23:17:26,747][WARN][o.e.d.PeerFinder] [es-master] address [192.168.240.43:9300], node [null], requesting [false] connection failed: [es-data][100.102.80.23:9300] non-master-eligible node found ``` ---
**Author:** ![learning\_fun](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/learning_fun/32/100343_2.png) [@learning\_fun](https://discuss.elastic.co/u/learning_fun)\ **Post date:** [January 14, 2022, 11:25pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/4 "2022-01-14T23:25:18Z")
But master node is running. ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [January 15, 2022, 10:27am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/5 "2022-01-15T10:27:13Z")
That's still only ~2 seconds of logs and no more information than before. Elasticsearch does log other, more useful, information by default, but you're not sharing enough info for us to help. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 12, 2022, 10:27am UTC](https://discuss.elastic.co/t/elasticsearch-cluster-uuid-is-not-available-after-version-upgrade/294441/6 "2022-02-12T10:27:50Z")
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