Common Elasticsearch Errors

Cluster Issues

• Cluster status is yellow (unassigned replicas)
• Cluster status is red (unassigned primary shards).
• Node is not joining the cluster.
• MasterNotDiscoveredException.
• Too many open files error.
• Node disconnected from the cluster.
• Cluster block exception due to insufficient disk space.
• Shard allocation failure.
• Split brain scenario (multiple master nodes).
• Node running out of heap memory.

Indexing Issues

• Document indexing rejected due to index.write block.
• IllegalArgumentException: Mapper for [field] conflicts with existing mapping.
• Exceeded maximum shard size for an index.
• Too many nested objects in a single document.
• Document missing a required field.
• Read-only index error.
• Dynamic mapping conflict during indexing.
• VersionConflictEngineException during document update.
• Too many fields in an index (mapping explosion).
• Index creation fails due to invalid settings.

Search and Query Issues

• Field [field_name] is not searchable.
• Failed to parse query DSL.
• No mapping found for [field_name] in search.
• Query is too slow due to inefficient script usage.
• Wildcard query too broad (performance impact).
• Script compilation failure.
• Aggregation results exceed memory limits.
• Terms aggregation returning partial results.
• too_many_buckets_exception during aggregations.
• Cannot retrieve scroll context due to expired scroll ID.

Performance Issues

• Search taking too long due to poorly optimized queries.
• CircuitBreakingException: Data exceeded memory limits.
• Nodes unresponsive due to GC overhead.
• Indexing rate exceeds cluster capacity.
• High CPU usage caused by frequent refresh operations.
• Query phase taking too long due to too many indices queried.
• Rebalancing causes slow cluster responses.
• High disk I/O causing node throttling.
• Bulk indexing operations failing intermittently.
• Refresh interval too frequent impacting performance.

Security and Access Issues

• AuthorizationException: User lacks permissions.
• Authentication failed for a specific user.
• SSL/TLS handshake failure.
• Invalid API key used for authentication.
• Role mappings not configured correctly.
• Index access denied due to restrictive index patterns.
• CORS policy errors in Kibana/Elasticsearch interactions.
• Failed to set up Security Index.
• Failed to apply license due to invalid license key.
• Token expired during long-running requests.