"Unable to initialize Elasticsearch cluster" error occurs after installing a new Fix Pack
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Issue
- After installing a new Fix Pack on your current environment you might encounter the following errors in the logs due to Liferay Connector to Elasticsearch version update:
2021-01-30 23:49:07.944 ERROR [Framework Event Dispatcher: Equinox Container: 3ebebf27-a7c4-4221-8b93-6f35077ca1cb][Framework:93] FrameworkEvent ERROR
java.lang.IllegalStateException: Unable to initialize Elasticsearch cluster: {_clusterHealthStatus=RED, _healthStatusMessage='{"cluster_name":"LiferayElasticsearchCluster","status":"red","timed_out":true,"number_of_nodes":1,"number_of_data_nodes":1,"active_primary_shards":1,"active_shards":1,"relocating_shards":0,"initializing_shards":1,"unassigned_shards":0,"delayed_unassigned_shards":0,"number_of_pending_tasks":0,"number_of_in_flight_fetch":0,"task_max_waiting_in_queue_millis":0,"active_shards_percent_as_number":50.0}'}
at com.liferay.portal.search.elasticsearch6.internal.ElasticsearchSearchEngine.waitForYellowStatus(ElasticsearchSearchEngine.java:295)
at com.liferay.portal.search.elasticsearch6.internal.ElasticsearchSearchEngine.initialize(ElasticsearchSearchEngine.java:107)
at com.liferay.portal.kernel.search.SearchEngineProxyWrapper.initialize(SearchEngineProxyWrapper.java:95)
...
Resolution
- Delete the indices and lock folders from Elasticsearch.
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