# Error loading kibana on a web browser - 503 service unavailable **URL:** \ **Category:** Kibana\ **Created:** [January 8, 2021, 9:23am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520 "2021-01-08T09:23:46Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![prajwal93](https://avatars.discourse-cdn.com/v4/letter/p/838e76/32.png) [@prajwal93](https://discuss.elastic.co/u/prajwal93)\ **Post date:** [January 8, 2021, 9:23am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/1 "2021-01-08T09:23:46Z")
I have an ELK cluster running and I have trouble loading Kibana in my web browser. It was working fine until 3 days before I made a change to logstash configuration. I installed Logstash-amazon\_es plugin, used to load data to Amazon Elasticsearch cluster. All the services are up and running fine without errors. I have checked the logs and could not find any errors. I have traced back my steps and uninstalled all the changes made, but yet I am not able to resolve this Kibana errors. **About the ELK stack configuration:** 1. A cluster of 4 nodes 2. Kibana is running behind a Nginx reverse proxy 3. The entire cluster is accessible inside a VPN and have an another Nginx proxy running 4. Kibana version - 6.8.13 5. Logstash version - 6.8.13 6. Elasticsearch version - 6.8.13 **Errors I see in browser** ![Screen Shot 2021-01-08 at 11.05.01 AM](https://us1.discourse-cdn.com/elastic/original/3X/e/a/ea7967434055b8396d300c9815c122be64be3f27.png) ![Screen Shot 2021-01-08 at 11.04.56 AM](https://us1.discourse-cdn.com/elastic/original/3X/5/6/56688daf7449b5df2a998c66d898178b1dc6fae3.png) Any help troubleshooting this is much appreciated! ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [January 11, 2021, 12:17am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/2 "2021-01-11T00:17:53Z")
Welcome to our community! 😃 What do your Kibana logs show? ---
**Author:** ![prajwal93](https://avatars.discourse-cdn.com/v4/letter/p/838e76/32.png) [@prajwal93](https://discuss.elastic.co/u/prajwal93)\ **Post date:** [January 11, 2021, 4:38am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/3 "2021-01-11T04:38:32Z")
Hi Mark, Thanks for the response. I was able to resolve the issue. The problem was, Kibana in one of nodes was down - it had problem connecting to elasticsearch. I had to change the following in `/etc/kibana/kibana.yml` `elasticsearch.ssl.verificationMode: certificate` to `elasticsearch.ssl.verificationMode: none` However, I have the same configuration across all nodes and there was no problem with other nodes. I was not able to figure out why. Can you please help? Thanks ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [January 11, 2021, 4:40am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/4 "2021-01-11T04:40:13Z")
We'd need to see the Kibana logs. ---
**Author:** ![prajwal93](https://avatars.discourse-cdn.com/v4/letter/p/838e76/32.png) [@prajwal93](https://discuss.elastic.co/u/prajwal93)\ **Post date:** [January 11, 2021, 4:53am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/5 "2021-01-11T04:53:00Z")
```auto {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:elasticsearch@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from yellow to red - Unable to connect to Elasticsearch.","prevState":"yellow","prevMsg":"Waiting for Elasticsearch"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["license","debug","xpack"],"pid":16326,"message":"Calling [data] Elasticsearch _xpack API. Polling frequency: 30001"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["error","elasticsearch","data"],"pid":16326,"message":"Request error, retrying\nGET https://localhost:9200/_xpack => self signed certificate"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["warning","elasticsearch","data"],"pid":16326,"message":"Unable to revive connection: https://localhost:9200/"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["warning","elasticsearch","data"],"pid":16326,"message":"No living connections"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["license","warning","xpack"],"pid":16326,"message":"License information from the X-Pack plugin could not be obtained from Elasticsearch for the [data] cluster. Error: No Living connections"} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:xpack_main@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:graph@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:spaces@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:security@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:searchprofiler@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:ml@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:tilemap@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:watcher@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:grokdebugger@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:logstash@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:beats_management@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:maps@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:index_management@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:index_lifecycle_management@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:rollup@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:remote_clusters@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:32Z","tags":["status","plugin:cross_cluster_replication@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from red to red - No Living connections","prevState":"red","prevMsg":"Unable to connect to Elasticsearch."} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","browser-driver","warning"],"pid":16326,"message":"Enabling the Chromium sandbox provides an additional layer of protection."} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","browser-driver","debug"],"pid":16326,"message":"Browser installed at /var/lib/kibana/headless_shell-linux/headless_shell"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","debug"],"pid":16326,"message":"Browser type: chromium"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","debug"],"pid":16326,"message":"Chromium sandbox disabled: true"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["status","plugin:reporting@6.8.13","error"],"pid":16326,"state":"red","message":"Status changed from uninitialized to red - No Living connections","prevState":"uninitialized","prevMsg":"uninitialized"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","worker","debug"],"pid":16326,"message":"CSV: Registering CSV worker"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","esqueue","worker","debug"],"pid":16326,"message":"kjs2cbmq0clid669e36hp36w - Created worker for job type csv"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","worker","debug"],"pid":16326,"message":"PNG: Registering PNG worker"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","esqueue","worker","debug"],"pid":16326,"message":"kjs2cbms0clid669e36iylvi - Created worker for job type PNG"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","worker","debug"],"pid":16326,"message":"PDF: Registering PDF worker"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","esqueue","worker","debug"],"pid":16326,"message":"kjs2cbmt0clid669e36jtor8 - Created worker for job type printable_pdf"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["reporting","debug"],"pid":16326,"message":"Running on os \"linux\", distribution \"Centos\", release \"7.9.2009\""} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","admin"],"pid":16326,"message":"Unable to revive connection: https://localhost:9200/"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","admin"],"pid":16326,"message":"No living connections"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","data"],"pid":16326,"message":"Unable to revive connection: https://localhost:9200/"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","data"],"pid":16326,"message":"No living connections"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","admin"],"pid":16326,"message":"Unable to revive connection: https://localhost:9200/"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","elasticsearch","admin"],"pid":16326,"message":"No living connections"} {"type":"log","@timestamp":"2021-01-11T04:25:33Z","tags":["warning","task_manager"],"pid":16326,"message":"PollError No Living connections"} ``` ---
**Author:** ![prajwal93](https://avatars.discourse-cdn.com/v4/letter/p/838e76/32.png) [@prajwal93](https://discuss.elastic.co/u/prajwal93)\ **Post date:** [January 12, 2021, 10:03am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/6 "2021-01-12T10:03:34Z")
I forgot to point out that the changes I made( `elasticsearch.ssl.verificationMode: certificate` to `elasticsearch.ssl.verificationMode: none`) was only on one node, the other three nodes have `elasticsearch.ssl.verificationMode: certificate` configuration ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [February 9, 2021, 10:03am UTC](https://discuss.elastic.co/t/error-loading-kibana-on-a-web-browser-503-service-unavailable/260520/7 "2021-02-09T10:03:42Z")
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