Edit report at https://bugs.php.net/bug.php?id=74287&edit=1
ID: 74287
Comment by: alex at 1200wd dot com
Reported by: jndockery at gmail dot com
Summary: DNS Resolution appears broken with recent Ubuntu
update
Status: Open
Type: Bug
Package: Network related
Operating System: Ubuntu 14.04.5 LTS
PHP Version: 5.6.30
Block user comment: N
Private report: N
New Comment:
For people like me that happened to stumble on this:
Checking my apt logs the following packages were updated at that time:
- libxml2
- libc-bin
This happened on an ubuntu 16.04 server with php7.
Previous Comments:
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[2017-03-22 10:33:52] spam2 at rhsoft dot net
sorry, but i don't get how ideas like "oh, my distribution updated libc and something
broke, i will report a bug on the victims upstream bugtracker" are growing
------------------------------------------------------------------------
[2017-03-21 22:46:11] nikic@php.net
@rhsoft: It would be much appreciated if you could tone down your comments a bit. They are commonly
passive aggressive, sometimes downright rude and contribute to a somewhat unpleasant atmosphere on
this bug tracker.
------------------------------------------------------------------------
[2017-03-21 21:55:14] spam2 at rhsoft dot net
and why don't you write a bugreport on the ubuntu bugtracker instead upstream? most likely some
library update broke the PHP installation - both is from ubuntu and PHP 5.6 is more or less EOL at
all
and another question: who does "automated updates" and then complains at upstream
bugtrackers that some unattended downstream stuff broke whatever?
------------------------------------------------------------------------
[2017-03-21 21:33:07] jndockery at gmail dot com
Description:
------------
After an automated update, PHP appears unable to resolve DNS entries
- Other commands still resolve properly: ping, telnet, ldapsearch, curl
- Affected 3 services on separate servers
- Servers without unattended-upgrades (updated 2017-03-17) still functioning
- Adding a manual entry in /etc/hosts allows DNS resolution
Affected service examples:
- ldap_bind(): "Can't contact LDAP server"
- PHP curl: "Could not resolve host: ..."
- SMTP: "Connection could not be established with host smtp.sendgrid.net"
Packages recently updated:
- libgnutls-openssl27:amd64
- multiarch-support:amd64
- libfreetype6:amd64
- libc-dev-bin:amd64
- libc-bin:amd64
- libc6:amd64
- libgnutls26:amd64
- libc6-dev:amd64
Start-Date: 2017-03-21 06:31:17
Upgrade: libgnutls-openssl27:amd64 (2.12.23-12ubuntu2.6, 2.12.23-12ubuntu2.7),
multiarch-support:amd64 (2.19-0ubuntu6.9, 2.19-0ubuntu6.10), libfreetype6:amd64 (2.5.2-1ubuntu2.5,
2.5.2-1ubuntu2.6), libc-dev-bin:amd64 (2.19-0ubuntu6.9, 2.19-0ubuntu6.10), libc-bin:amd64
(2.19-0ubuntu6.9, 2.19-0ubuntu6.10), libc6:amd64 (2.19-0ubuntu6.9, 2.19-0ubuntu6.10),
libgnutls26:amd64 (2.12.23-12ubuntu2.6, 2.12.23-12ubuntu2.7), libc6-dev:amd64 (2.19-0ubuntu6.9,
2.19-0ubuntu6.10)
End-Date: 2017-03-21 06:31:22
Thank you!
Test script:
---------------
<?
$url = "http://$_SERVER[HTTP_HOST]";
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_exec($ch);
print_r(curl_error($ch));
curl_close($ch);
Expected result:
----------------
no output
Actual result:
--------------
Could not resolve host: example.example.com
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Edit this bug report at https://bugs.php.net/bug.php?id=74287&edit=1