Initialization Error

Array
(
    [callback] => Array
        (
            [0] => CRM_Core_Error
            [1] => simpleHandler
        )

    [code] => -14
    [message] => DB Error: no database selected
    [mode] => 16
    [debug_info] => SELECT id, name, value, domain_id, contact_id, is_domain, component_id, created_date, created_id
FROM civicrm_setting
WHERE (domain_id = 1) AND (is_domain = 1)
 [nativecode=2027 ** Malformed packet]
    [type] => DB_Error
    [user_info] => SELECT id, name, value, domain_id, contact_id, is_domain, component_id, created_date, created_id
FROM civicrm_setting
WHERE (domain_id = 1) AND (is_domain = 1)
 [nativecode=2027 ** Malformed packet]
    [to_string] => [db_error: message="DB Error: no database selected" code=-14 mode=callback callback=CRM_Core_Error::simpleHandler prefix="" info="SELECT id, name, value, domain_id, contact_id, is_domain, component_id, created_date, created_id
FROM civicrm_setting
WHERE (domain_id = 1) AND (is_domain = 1)
 [nativecode=2027 ** Malformed packet]"]
)