Error: Request to Elasticsearch failed - docker

Question

Kibana version: 5.4.2
Elasticsearch version: 5.4.2
Logstash version: 5.4.2
Server OS version: Linux Red Hat, docker container kibana, logstash and elasticsearch.
Logs does not display in ELK. What is the problem? How to fix the error?
Discover: Request to Elasticsearch failed:
{"error":{"root_cause":[],"type":"search_phase_execution_exception","reason":"all
shards
failed","phase":"query","grouped":true,"failed_shards":[]},"status":503}
Less
Error: Request to Elasticsearch failed:
{"error":{"root_cause":[],"type":"search_phase_execution_exception","reason":"all
shards
failed","phase":"query","grouped":true,"failed_shards":[]},"status":503}
at ip-address:5601/bundles/kibana.bundle.js?v=15117:28:10760 at
Function.Promise.try
(http://:5601/bundles/commons.bundle.js?v=15117:82:22203)
at ip-address:5601/bundles/commons.bundle.js?v=15117:82:21573 at
Array.map (native) at Function.Promise.map
(http://ip-address:5601/bundles/commons.bundle.js?v=15117:82:21528) at
callResponseHandlers
(http://:5601/bundles/kibana.bundle.js?v=15117:28:10376)
atip-address:5601/bundles/kibana.bundle.js?v=15117:27:29944 at
processQueue
(ip-address:5601/bundles/commons.bundle.js?v=15117:38:23621) at
ip-address:5601/bundles/commons.bundle.js?v=15117:38:23888 at
Scope.$eval
(ip-address:5601/bundles/commons.bundle.js?v=15117:39:4619)

Answer 1

If you have multiple websites
Go to
STORES > CONFIGURATION > CATALOG > CATALOG > CATALOG SEARCH > Elasticsearch Index Prefix.
Set a different prefix for each website, any random one for each. Reindex and flush cache on each store.
Another Official Solution is
Base on the bug filed in my previous reply, I modified the following file to fix the search problem.
./vendor/magento/module-elasticsearch/Model/Adapter/FieldMapper/Product/FieldProvider/FieldType/Converter.php
private const ES_DATA_TYPE_DOUBLE = 'double';
--> private const ES_DATA_TYPE_FLOAT = 'float';

Answer 2

Are the indices being created ? What does this show ?
GET /_cat/indices/