Elasticsearch Troubleshooting Guides
Elasticsearch errors can surface at the worst possible moments — during deployments, under peak traffic, or in the middle of critical operations. This collection of 4 troubleshooting guides covers the most common Elasticsearch issues encountered in database management, queries, and data operations. Each article walks through specific error messages with step-by-step diagnosis, root cause analysis, and verified solutions. Whether you're dealing with configuration problems, authentication failures, timeout errors, or unexpected behavior, these guides are designed to get you from error message to resolution as quickly as possible. Solutions are backed by official documentation and real-world production experience.
Error Quick Reference
| Article | Description |
|---|---|
| Fixing 'Elasticsearch Cluster Health Red': Comprehensive Troubleshooting Guide | Resolve an Elasticsearch cluster health status red error. Step-by-step diagnostic commands, unassigned shard recovery, and data restoration strategies. |
| Fixing Elasticsearch Timeout and Connection Refused Errors | Comprehensive guide to resolving Elasticsearch timeout, connection refused, OOM, and disk full errors. Learn root causes, diagnostic commands, and permanent fix |
| Troubleshooting Elasticsearch OOM: Fixing OutOfMemoryError and Killed Processes | Fix Elasticsearch OutOfMemoryError and kernel OOM killed process crashes. Learn how to tune JVM heap, optimize queries, and configure circuit breakers. |
| Troubleshooting Elasticsearch Timeout, OOM, and Connection Errors | Comprehensive SRE guide to diagnosing and fixing Elasticsearch timeout, connection refused, out of memory (OOM), disk full, and permission denied errors. |
Most Common Elasticsearch Errors
Fixing 'Elasticsearch Cluster Health Red': Comprehensive Troubleshooting Guide
Resolve an Elasticsearch cluster health status red error. Step-by-step diagnostic commands, unassigned shard recovery, and data restoration strategies.
Fixing Elasticsearch Timeout and Connection Refused Errors
Comprehensive guide to resolving Elasticsearch timeout, connection refused, OOM, and disk full errors. Learn root causes, diagnostic commands, and permanent fix
Troubleshooting Elasticsearch OOM: Fixing OutOfMemoryError and Killed Processes
Fix Elasticsearch OutOfMemoryError and kernel OOM killed process crashes. Learn how to tune JVM heap, optimize queries, and configure circuit breakers.
All Elasticsearch Guides4 guides
Fixing 'Elasticsearch Cluster Health Red': Comprehensive Troubleshooting Guide
Resolve an Elasticsearch cluster health status red error. Step-by-step diagnostic commands, unassigned shard recovery, and data restoration strategies.
Fixing Elasticsearch Timeout and Connection Refused Errors
Comprehensive guide to resolving Elasticsearch timeout, connection refused, OOM, and disk full errors. Learn root causes, diagnostic commands, and permanent fix
Troubleshooting Elasticsearch OOM: Fixing OutOfMemoryError and Killed Processes
Fix Elasticsearch OutOfMemoryError and kernel OOM killed process crashes. Learn how to tune JVM heap, optimize queries, and configure circuit breakers.
Troubleshooting Elasticsearch Timeout, OOM, and Connection Errors
Comprehensive SRE guide to diagnosing and fixing Elasticsearch timeout, connection refused, out of memory (OOM), disk full, and permission denied errors.