[FIX] Magento 2.4.3 Elastic search issue

hi
kindly quote time and cost
Server : CentOS
Ram 16 GB
Space : 400 GB

Error log (log files are attachd)

[2021-12-20 21:54:14] main.CRITICAL: No alive nodes found in your cluster {"exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []
[2021-12-20 21:54:14] main.CRITICAL: No alive nodes found in your cluster {"exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []
[2021-12-20 21:54:14] main.CRITICAL: No alive nodes found in your cluster {"report_id":"b331989da6929b106a3d201a1b451b4e20c11366d35c713c84061ee7fff4425c","exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []
[2021-12-20 22:06:16] main.CRITICAL: No alive nodes found in your cluster {"exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []
[2021-12-20 22:06:16] main.CRITICAL: No alive nodes found in your cluster {"exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []
[2021-12-20 22:06:16] main.CRITICAL: No alive nodes found in your cluster {"report_id":"59de772d3dc514d9a847987994ec398e7d14abb94be9607c2222b639dc8da8fb","exception":"[object] (Elasticsearch\\Common\\Exceptions\\NoNodesAvailableException(code: 0): No alive nodes found in your cluster at /home/brandshopco/public_html/SOBSKE2.4/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php:64)"} []

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[2021-12-20 22:04:23] main.CRITICAL: Indexer handler is not available: elasticsuite [] []
[2021-12-20 22:04:23] main.CRITICAL: No alive nodes found in your cluster [] []
[2021-12-20 22:06:16] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-20 23:28:38] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-21 01:15:04] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-21 02:34:23] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-21 02:54:42] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-21 03:06:25] main.ERROR: No alive nodes found in your cluster [] []
[2021-12-21 06:09:43] main.ERROR: No alive nodes found in your cluster [] []
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