technical issue – whenever I run the php bin/magento indexer:reindex the website goes down

I’m having a technical issue – whenever I run the
php bin/magento indexer:reindex
command on the live website, the website goes down –

This is happening only on the live website –
If this same website is run on staging and local then nothing like this happens-

And such errors are also being reported in the logs-

I tried to attaching production DB with staging and in Local and run reindexing, but no such errors were reproduced.

Here is my app/etc/env.php file on production server

<?php
return [
    'backend' => [
        'frontName' => 'someurl'
    ],
    'remote_storage' => [
        'driver' => 'file'
    ],
    'queue' => [
        'consumers_wait_for_messages' => 0
    ],
    'crypt' => [
        'key' => 'somekey'
    ],
    'db' => [
        'table_prefix' => '',
        'connection' => [
            'default' => [
                'host' => 'somehost',
                'dbname' => 'somename',
                'username' => 'someusername',
                'password' => 'somepassword',
                'model' => 'mysql4',
                'engine' => 'innodb',
                'initStatements' => 'SET NAMES utf8;',
                'active' => '1',
                'driver_options' => [
                    1014 => false
                ]
            ]
        ]
    ],
    'resource' => [
        'default_setup' => [
            'connection' => 'default'
        ]
    ],
    'x-frame-options' => 'SAMEORIGIN',
    'MAGE_MODE' => 'production',
    'session' => [
        'save' => 'redis',
        'redis' => [
            'host' => 'redis1.i',
            'port' => '6379',
            'password' => '',
            'timeout' => '2.5',
            'persistent_identifier' => '',
            'database' => '0',
            'compression_threshold' => '8192',
            'compression_library' => 'gzip',
            'log_level' => '1',
            'max_concurrency' => '6',
            'break_after_frontend' => '5',
            'break_after_adminhtml' => '30',
            'first_lifetime' => '600',
            'bot_first_lifetime' => '30',
            'bot_lifetime' => '7200',
            'disable_locking' => '1',
            'min_lifetime' => '60',
            'max_lifetime' => '6048000',
            'max_size' => '512000'
        ]
    ],
    'cache' => [
        'frontend' => [
            'default' => [
                'id_prefix' => 'a91_',
                'backend' => 'Magento\Framework\Cache\Backend\Redis',
                'backend_options' => [
                    'server' => 'redis11.i',
                    'database' => '0',
                    'port' => '6379',
                    'password' => '',
                    'compress_data' => '1',
                    'compression_lib' => 'gzip'
                ]
            ],
            'page_cache' => [
                'id_prefix' => 'a91_',
                'backend' => 'Magento\Framework\Cache\Backend\Redis',
                'backend_options' => [
                    'server' => 'redis31.i',
                    'database' => '0',
                    'port' => '6379',
                    'password' => '',
                    'compress_data' => '1',
                    'compression_lib' => 'gzip'
                ]
            ]
        ],
        'allow_parallel_generation' => false
    ],
    'lock' => [
        'provider' => 'db',
        'config' => [
            'prefix' => ''
        ]
    ],
    'directories' => [
        'document_root_is_pub' => true
    ],
    'cache_types' => [
        'config' => 1,
        'layout' => 1,
        'block_html' => 1,
        'collections' => 1,
        'reflection' => 1,
        'db_ddl' => 1,
        'compiled_config' => 1,
        'eav' => 1,
        'customer_notification' => 1,
        'config_integration' => 1,
        'config_integration_api' => 1,
        'full_page' => 1,
        'config_webservice' => 1,
        'translate' => 1,
        'vertex' => 1
    ],
    'downloadable_domains' => [
        'www.somedomain.com.au'
    ],
    'install' => [
        'date' => 'Thu, 08 Jun 2023 06:59:26 +0000'
    ]
];

Here is my elastic search settings