getaddrinfo: Name or service not known - Redmine
The getaddrinfo() function translates the name of a service location (for example, a host name) and/or a service name and returns a set of socket addresses and associated information to be used in creating a socket with which to address the specified service. The getaddrinfo_a() function performs the same task as getaddrinfo(3), but allows multiple name look-ups to be performed asynchronously, with optional notification on completion of look-up operations. socket.getaddrinfo (host, port [, family [, socktype [, proto [, flags]]]]) ¶ Translate the host/port argument into a sequence of 5-tuples that contain all the necessary arguments for creating a socket connected to that service. host is a domain name, a string representation of an IPv4/v6 address or None. The first DNS reply isn't ignored. getaddrinfo() didn't return until it received the response to the first AAAA query (ID: 26090). So the real problem here is why your machine hasn't immediately received the response to the AAAA query, while it has received the response for the A query (ID: 54755).
Function Overview: If we know a network service by host name like example.org or the IP address of the network service either in form of IPv4 or IPv6 along with the port number of the network service, getaddrinfo () will return a list of tuples containing information about …
Dec 22, 2015 freeaddrinfo(), getaddrinfo() -- get address information
The GETADDRINFO call translates the name of a service location (for example, a host name), a service name, or both, into a set of socket addresses and other associated information.
The getaddrinfo() function combines the functionality provided by the gethostbyname(3) and getservbyname(3) functions into a single interface, but unlike the latter functions, getaddrinfo() is reentrant and allows programs to eliminate IPv4-versus-IPv6 dependencies. The addrinfo structure used by getaddrinfo() contains the following fields: The functions getaddrinfo() and getnameinfo() convert domain names, hostnames, and IP addresses between human-readable text representations and structured binary formats for the operating system's networking API. Both functions are contained in the POSIX standard application programming interface (API). The getaddrinfo() function combines the functionality provided by the gethostbyname(3) and getservbyname(3) functions into a single interface, but unlike the latter functions, getaddrinfo() is reentrant and allows programs to eliminate IPv4-versus-IPv6 dependencies. This GetAddrInfo function should be called with the pNodeName and pServiceName parameters of a pointer of type TCHAR and the pHints and ppResult parameters of a pointer of type ADDRINFOT. When UNICODE or _UNICODE is defined, GetAddrInfo is defined to GetAddrInfoW, the Unicode version of the function, and ADDRINFOT is defined to the addrinfoW The getaddrinfo() function performs the functionality of gethostbyname() and getservbyname() but in a more sophisticated manner. The nodename and servname arguments are either pointers to null-terminated strings or NULL. One or both of these two arguments must be a non-NULL pointer. Normally, a client scenario specifies both nodename and servname. If the hints parameter in getaddrinfo is a NULL pointer, it is the same as if the caller fills in an addrinfo structure initialized to zero with ai_family set to PF_UNSPEC. Upon successful return, a pointer to a linked list of one or more addrinfo structures is returned through the res parameter.