---
title: Troubleshoot Elasticsearch clusters
description: Use the topics in this section to troubleshoot Elasticsearch clusters. Fix common cluster issues, Troubleshoot an unstable cluster, Troubleshoot an unbalanced...
url: https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/clusters
---

# Troubleshoot Elasticsearch clusters
Use the topics in this section to troubleshoot Elasticsearch clusters.
- [Fix common cluster issues](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/fix-common-cluster-issues)
- [Troubleshoot an unstable cluster](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/troubleshooting-unstable-cluster)
- [Troubleshoot an unbalanced cluster](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/troubleshooting-unbalanced-cluster)
- [Troubleshoot remote clusters](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/remote-clusters)
- [Diagnose unassigned shards](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/diagnose-unassigned-shards)
- [Troubleshoot shard capacity health issues](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/troubleshooting-shards-capacity-issues)
- [Using the cluster allocation API for troubleshooting](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot/elasticsearch/cluster-allocation-api-examples)


## Additional resources

- [Troubleshooting overview](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/troubleshoot)
- [Contact us](/elastic/docs-content/pull/4236/troubleshoot#contact-us)