python-2.6 regression: tests hang on test_transport_implementations.TransportTests.test_get(HTTPSServer_PyCurl)

[pva]

After I've upgraded python, tests started to fail on:

 $=> python bzr --no-plugins selftest test_transport_implementations.TransportTests.test_get
testing: /home/pva/work/bzr.dev/bzr
   /home/pva/work/bzr.dev/bzrlib (1.16dev python2.6.2)

[6/114 in 0s, 1 missing] test_transport_implementations.TransportTests.test_get(HTTPSServer_PyCurl)

strace on the process shows:
camobap bzr-1.14.1 # strace -p 26112
Process 26112 attached - interrupt to quit
restart_syscall(<... resuming interrupted call ...>) = 0
poll([{fd=6, events=POLLIN|POLLPRI}], 1, 0) = 0 (Timeout)
clock_gettime(CLOCK_MONOTONIC, {182992, 505733180}) = 0
clock_gettime(CLOCK_MONOTONIC, {182992, 505753853}) = 0
clock_gettime(CLOCK_MONOTONIC, {182992, 505774805}) = 0
poll([{fd=6, events=POLLIN|POLLPRI}], 1, 1000) = 0 (Timeout)
poll([{fd=6, events=POLLIN|POLLPRI}], 1, 0) = 0 (Timeout)
[and so on...]

I've tried recent trunk (as of yesterday) and also there are some fixes for python-2.6 bzr test still hangs. Thank you for your time.

[Vincent Ladeuil (vila)]

Thanks for the report. The problem is known to be related to pycurl but not yet fully diagnosed.

[Russel Winder (russel)]

Just a confirmation: removing the python-pycurl package "solves" the problem.

[Vincent Ladeuil (vila)]

mumblemumbleubuntupleaseupgradepycurlto7.19.0.

I'm almost sure it's fixed in curl 7.19.0, can someone with a more recent curl confirm ?

[Russel Winder (russel)]

Karmic has 7.19.0, so is this just a "let's wait"?

[Vincent Ladeuil (vila)]

Hmm, the question is more: should we continue debugging pycurl issues or enhance urllib so that pycurl can be deprecated...

@Russel: can I take your comment as a confirmation that the bug doesn't manifest itself under karmic ?

[Russel Winder (russel)]

'Fraid not. I tend to stick with released OS distributions (so I am using Jaunty) even though I am using development head of selected products: Bazaar, Groovy, Gant, etc. My comment was based entirely on that reported by packages.ubuntu.com.

[pva (pva)]

> I'm almost sure it's fixed in curl 7.19.0

We have curl-7.19.4 stable since march in Gentoo. So ... the bug is not fixed there.

[Vincent Ladeuil (vila)]

@pva: Thanks a lot for that confirmation.

That narrows down the problem to a bad interaction between python2.6 and pycurl...

[pva (pva)]

Yup, it's fixed. Thanks!