Powering 194 Million Users: LINE’s Journey to an AI Ready OpenSearch Platform
Case study inspired by the OpenSearchCon Korea keynote by Sun Ro Lee, Cloud Engineer, LINE Plus
Challenge
LINE’s platform supports over 194 million monthly... Read more.
Error log: InvalidIndexNameException – The Illegal Name
Error log: You will see this error when you try to create a new index with a name that doesn’t follow the rules. { "error" : { "root_cause" : [...... Read more.
Error log: Unassigned Shards – Why Your Cluster is Showing Yellow or Red
Error Log: You won’t typically see "unassigned_shards" directly in your log files as an error message. Instead, this is a status indicator you’d find... Read more.
Error log: ClusterBlockException – The “index read-only” Error
Error log: You’ll see this error when trying to write data (index, update) to your cluster: org.opensearch.cluster.block.ClusterBlockException: blocked by:... Read more.
Error log: NodeNotConnectedException / NoNodeAvailableException – The Unreachable Cluster
Error log: You’ll typically see these errors in the logs of your client applications (e.g., Logstash, your custom application using a client library, or even... Read more.
Error log: BulkIndexError – The Batch Failure
Error log: This error doesn’t appear in your OpenSearch logs. Instead, it’s an exception your client application receives when one or more documents... Read more.
Error log: “all shards failed” – The misleading error
Error log: When you run a search query, you might get a JSON response like this, or a similar exception in your application logs: JSON { "error" : { "root_cause"...... Read more.
Error log: VersionConflictEngineException – The Optimistic Update Failure
Error log: This error appears when you try to update or delete a document that has been changed by another process. JSON { "error" : { "root_cause" : [ {...... Read more.
Error log: FATAL Error: Request Timeout” – The unresponsive dashboard
Error Log: This error doesn’t appear in your OpenSearch logs. It appears in your OpenSearch Dashboards logs (often in stdout or a opensearch_dashboards.log... Read more.
Error log: “Courier fetch: XXX of YYY shards failed” – The dashboard search failure
Error log: This error appears in the OpenSearch Dashboards UI (in your browser) when you try to load a dashboard, run a Discover query, or use a visualization. Courier... Read more.
