[Python-Dev] Buildbot timing out - test suite failure (original) (raw)

[Python-Dev] Buildbot timing out - test suite failure - test_socket issue with UDP6?

Chris Angelico rosuav at gmail.com
Sat Jan 23 01:03:12 EST 2016

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

This is happening across all the 3.* branches on my buildbot, but NOT on 2.7, and not on any other buildbots. That makes it look like some kind of config problem at my end. In seeking to diagnose it, I duplicated the 3.x build directory and manually ran the commands to run a test, and it stalled out (I didn't let it go to the whole hour but it sat there for some minutes) at the same place: in test_socket.

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. The test runs just fine on my main system, so it's only failing in the buildbot VM. Any ideas as to what's going on or how to diagnose?

By the way, this looks odd:

make buildbottest TESTOPTS= TESTPYTHONOPTS= TESTTIMEOUT=3600 in dir /root/buildarea/3.x.angelico-debian-amd64/build (timeout 3900 secs)

The parameter says 3600 (which corresponds to the error message at the end), but it echoes back that the timeout is 3900 seconds.

ChrisA

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