---
title: Fix error: Unable to retrieve node fs stats
description: This error occurs when Kibana or another Elasticsearch client can't fetch version information from an Elasticsearch node. Without version information,...
url: https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4473/troubleshoot/elasticsearch/unable-to-retrieve-node-fs-stats
---

# Fix error: Unable to retrieve node fs stats
```json
Error: unable to retrieve node fs stats
```

This error occurs when Kibana or another Elasticsearch client can't fetch version information from an Elasticsearch node. Without version information, the client can't confirm compatibility or proceed with requests.
Possible causes include network issues, incorrect configuration, or unavailable nodes. To diagnose, first try these general actions:
- Ensure that all nodes are up and running.
- Check the network connectivity between the client and the nodes.
- Verify configuration settings.

If the issue persists, check the Elasticsearch logs for details, then continue with the tips below.

## Check potential causes

This error typically appears in the Kibana logs during startup. Because Kibana acts as a client to Elasticsearch, it requires access to several resources:
- The cluster's host and port
- Authentication credentials, if required
- TLS settings, if applicable

If Kibana can't reach the configured nodes, it can't verify version compatibility and logs the `unable to retrieve` error. Check these possible access issues:
- One or more entries in `elasticsearch.hosts` are unreachable or misconfigured
- The `KBN_PATH_CONF` environment variable points to a different config file
- A firewall is blocking access between Kibana and Elasticsearch


## Configuration locations

Settings are defined in `kibana.yml`, usually located at `$KIBANA_HOME/config`. You can change the path as needed:
```bash
KBN_PATH_CONF=/home/kibana/config ./bin/kibana
```

Check the relevant settings:
```yaml
elasticsearch.hosts: ["http://localhost:9200"]
elasticsearch.username: "kibana"
elasticsearch.password: "your_password"
elasticsearch.ssl.certificateAuthorities: ["path/to/ca.crt"]
```

Kibana tries every endpoint in `elasticsearch.hosts`, so even one unreachable node can cause the error. Use `https` if your cluster requires encrypted communication.

### Test connectivity

Use `curl` to test the connection to each host in `elasticsearch.hosts`:
```bash
curl <ELASTICSEARCH_HOST_URL>:9200/
```

If you're using TLS, try one of the following:
```bash
# Insecure test
curl -u elastic -k https://es01:9200/

# Secure test
curl -u elastic --cacert ~/certs/ca/ca.crt https://es01:9200/
```

Example response:
```json
{
  "name" : "node01",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "fxP-R0FTRcmTl_AWs7-DiA",
  "version" : {
    "number" : "7.13.3",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "5d21bea28db1e89ecc1f66311ebdec9dc3aa7d64",
    "build_date" : "2021-07-02T12:06:10.804015202Z",
    "build_snapshot" : false,
    "lucene_version" : "8.8.2"
  },
  "tagline" : "You Know, for Search"
}
```

If you're still encountering issues, check the Kibana logs for more details and context.