ElasticSearch Plugin problem

Question

How to install the plugin of the ElasticSearch? After installation to the ElasticSearch, there has a bug and show the error message as below:

Deprecated: filter_var(): explicit use of FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED is deprecated in /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Client.php on line 1547

Fatal error: Uncaught Elasticsearch\Common\Exceptions\Serializer\JsonErrorException: Syntax error in /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Serializers/SmartSerializer.php:93 Stack trace: #0 /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Serializers/SmartSerializer.php(64): Elasticsearch\Serializers\SmartSerializer->decode('') #1 /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Transport.php(171): Elasticsearch\Serializers\SmartSerializer->deserialize('', Array) #2 /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Endpoints/AbstractEndpoint.php(85): Elasticsearch\Transport->performRequest('HEAD', '/q2a-elasticsea...', Array, NULL) #3 /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-clien in /www/wwwroot/abc.com/qa-plugin/q2a-elasticsearch-master/es-client/vendor/elasticsearch/elasticsearch/src/Elasticsearch/Serializers/SmartSerializer.php on line 93

Please help and advise.

Thank you.

Comments

Check ur elasticsearch whether is running. View localhost:9200 in brower.
To install a plugin (requires Q2A 1.3 or later), place its directory in Q2A’s qa-plugin directory, then open the Plugins section of the Admin panel and check it is listed. The plugin may also offer some options on this page.

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The plugin can work on CentOS 8.2?

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Hi there, I've updated the plugin with the newest ES. Check it out here: https://www.question2answer.org/qa/90944/elasticsearch-improve-feature-powerful-scalable-search-engine
and let me know if you have any issue!