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Database Exceptionyii\db\Exception

Failed to open redis DB connection (r-2ze2ba4890e82724.redis.rds.aliyuncs.com:6379, database=2): 0 - php_network_getaddresses: getaddrinfo failed: Name or service not known

Error Info: php_network_getaddresses: getaddrinfo failed: Name or service not known
$_GET = [
    'keyword' => '宋光华',
];