Failed to connect to Redis server: Connection refused [tcp://lin20-vlan:6379]

error: 0
file: /var/www/html/machobb-www/class/Tools/Redis.php
line: 38

{
    "file": "/var/www/html/machobb-www/class/Tools/Redis.php",
    "line": 54,
    "function": "connect",
    "class": "Tools_Redis",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/CacheX.php",
    "line": 22,
    "function": "get",
    "class": "Tools_Redis",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectCached.php",
    "line": 72,
    "function": "get",
    "class": "Tools_CacheX",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectCached.php",
    "line": 40,
    "function": "basic_cache",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectCached.php",
    "line": 47,
    "function": "object_namespace_cache",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectCached.php",
    "line": 62,
    "function": "object_namespace_load",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectMongo.php",
    "line": 478,
    "function": "object_cache",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/ObjectMongo.php",
    "line": 485,
    "function": "field2id_cache",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/class/Tools/Session.php",
    "line": 401,
    "function": "field2id_load",
    "class": "Tools_Sites",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/__webui.php",
    "line": 171,
    "function": "site_id_get",
    "class": "Tools_Session",
    "type": "::"
}

{
    "file": "/var/www/html/machobb-www/__catchall.php",
    "line": 3,
    "args": [
        "/var/www/html/machobb-www/__webui.php"
    ],
    "function": "include_once"
}