[issue29272] test_logging hangs if /etc/hosts only aliases "localhost" to ::1

[STINNER Victor]

STINNER Victor  added the comment:

I confirm the issue. test_logging hangs if the resolution of the hostname fails 
with a timeout.

I worked again the issue by adding my hostname to /etc/hosts.

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nosy: +vstinner

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[issue29272] test_logging hangs if /etc/hosts only aliases "localhost" to ::1

[KMiNT21]

KMiNT21  added the comment:

The same bug for me:
3.6.5 and 3.6.4 -hangs on test_logging forever.

Thanks to this report - I've commented some lines in /etc/host
and after 'test_logging' passed OK!

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nosy: +KMiNT21

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[issue29272] test_logging hangs if /etc/hosts only aliases "localhost" to ::1

[Brian Vandenberg]

New submission from Brian Vandenberg:

On some of the linux boxes on our (air-gapped, if that matters) network it 
looks like some of them were mis-configured and their /etc/hosts file looks 
something like this:

$ cat /etc/hosts
127.0.0.1 snoopy.the.internal.domain snoopy localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

... whereas for other linux machines not exhibiting this problem:

$ cat /etc/hosts
127.0.0.1 woodstock.the.internal.domain woodstock localhost 
localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

It appears this is causing test_logging to hang while running SocketHandlerTest.

Unfortunately I don't have administrative privileges so I'm not able to prove 
I'm right.  I only have circumstantial evidence, but no machine I tested (about 
20 machines) contradicts what I stated above.

--
components: Tests
messages: 285452
nosy: phantal
priority: normal
severity: normal
status: open
title: test_logging hangs if /etc/hosts only aliases "localhost" to ::1
type: behavior
versions: Python 3.6

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