2016-01-23 7:03 GMT+01:00 Chris Angelico <ros...@gmail.com>: > I just had a major crash on the system that hosts the > angelico-debian-amd64 buildbot, and as usual, checked it carefully > after bringing everything up. It seems now to be timing out after an > hour of operation: > > http://buildbot.python.org/all/builders/AMD64%20Debian%20root%203.x/builds/3132/steps/test/logs/stdio
I opened http://bugs.python.org/issue26206 to track this issue. > Running just that test file: > > $ ./python Lib/test/test_socket.py > ... chomp lots of lines ... > testRecvmsgPeek (__main__.RecvmsgUDP6Test) ... > > seems to indicate that the stall is due to IPv6 and UDP. The VM should > have full IPv6 support, although my ISPs don't carry IPv6 traffic, so > it won't be able to reach the internet proper; but it should be able > to do all manner of local tests. Try to apply attached patch and run: $ ./python -m test -v -m testRecvmsgPeek test_socket (...) testRecvmsgPeek (test.test_socket.RecvmsgUDP6Test) ... CLI SOCK <socket.socket fd=5, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_DGRAM, proto=0, laddr=('::1', 44347, 0, 0)> SERV SOCK <socket.socket fd=4, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_DGRAM, proto=0, laddr=('::1', 40488, 0, 0)> CLI SOCK ('::1', 44347, 0, 0) SERV SOCK ('::1', 40488, 0, 0) ok testRecvmsgPeek (test.test_socket.RecvmsgIntoUDP6Test) ... CLI SOCK <socket.socket fd=5, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_DGRAM, proto=0, laddr=('::1', 52721, 0, 0)> SERV SOCK <socket.socket fd=4, family=AddressFamily.AF_INET6, type=SocketKind.SOCK_DGRAM, proto=0, laddr=('::1', 43967, 0, 0)> CLI SOCK ('::1', 52721, 0, 0) SERV SOCK ('::1', 43967, 0, 0) ok (...) As you can see: the test uses the local loopback interface. Inet6TestBase.host is "::1". You can try to run a UDP server using netcat: "nc -l -u ::1 12345". Keep the command running in a terminal, and then run in a different terminal: "echo abc | nc -u ::1 12345". You should receive abc in the server. Victor
diff -r 58266f5101cc Lib/test/test_socket.py --- a/Lib/test/test_socket.py Tue Jan 26 21:46:03 2016 -0800 +++ b/Lib/test/test_socket.py Wed Jan 27 10:35:32 2016 +0100 @@ -2049,6 +2049,8 @@ class SendrecvmsgConnectionlessBase(Send return ([], [], 0, self.serv_addr) def sendToServer(self, msg): + print("CLI SOCK", self.cli_sock) + print("CLI SOCK", self.cli_sock.getsockname()) return self.cli_sock.sendto(msg, self.serv_addr) @@ -2371,6 +2373,8 @@ class RecvmsgGenericTests(SendrecvmsgBas # data without consuming it. # Receive part of data with MSG_PEEK. + print("SERV SOCK", self.serv_sock) + print("SERV SOCK", self.serv_sock.getsockname()) msg, ancdata, flags, addr = self.doRecvmsg(self.serv_sock, len(MSG) - 3, 0, socket.MSG_PEEK)
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