Initialization Error

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

    [code] => -14
    [message] => DB Error: no database selected
    [mode] => 16
    [debug_info] => SELECT GET_LOCK( '2351e569b4c44deae20bd605ec1e2dbcb3f2c0dc', 3 ) [nativecode=2006 ** MySQL server has gone away]
    [type] => DB_Error
    [user_info] => SELECT GET_LOCK( '2351e569b4c44deae20bd605ec1e2dbcb3f2c0dc', 3 ) [nativecode=2006 ** MySQL server has gone away]
    [to_string] => [db_error: message="DB Error: no database selected" code=-14 mode=callback callback=CRM_Core_Error::simpleHandler prefix="" info="SELECT GET_LOCK( '2351e569b4c44deae20bd605ec1e2dbcb3f2c0dc', 3 ) [nativecode=2006 ** MySQL server has gone away]"]
)