Public bug reported:
We stopped being able to access maas through its web address and this
caused a crash:
File "/usr/lib/python2.7/dist-packages/oil_ci/common/maas.py", line 137, in
get_tagged_nodes
all_nodes_list = self.nodes_list(user)
File "/usr/lib/python2.7/dist-packages/oil_ci/common/maas.py", line 378, in
nodes_list
return json.loads(self.cmd(command))
File "/usr/lib/python2.7/dist-packages/oil_ci/common/maas.py", line 281, in
cmd
content = self.client.get(command).read()
File "/usr/lib/python2.7/dist-packages/apiclient/maas_client.py", line 237,
in get
url, method="GET", headers=headers)
File "/usr/lib/python2.7/dist-packages/apiclient/maas_client.py", line 116,
in dispatch_query
res = urllib2.urlopen(req)
File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 404, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 422, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1214, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
raise URLError(err)
URLError: <urlopen error [Errno 111] Connection refused>
On the apache2 error log, I saw:
ue Sep 27 06:25:12.159028 2016] [mpm_event:notice] [pid 1895:tid
140037883340672] AH00489: Apache/2.4.18 (Ubuntu) configured -- resuming normal
operations
[Tue Sep 27 06:25:12.159257 2016] [core:notice] [pid 1895:tid 140037883340672]
AH00094: Command line: '/usr/sbin/apache2'
[Wed Sep 28 06:25:09.318844 2016] [mpm_event:notice] [pid 1895:tid
140037883340672] AH00493: SIGUSR1 received. Doing graceful restart
AH00558: apache2: Could not reliably determine the server's fully qualified
domain name, using 127.0.1.1. Set the 'ServerName' directive globally to
suppress this message
[Wed Sep 28 06:25:12.038905 2016] [mpm_event:notice] [pid 1895:tid
140037883340672] AH00489: Apache/2.4.18 (Ubuntu) configured -- resuming normal
operations
[Wed Sep 28 06:25:12.038944 2016] [core:notice] [pid 1895:tid 140037883340672]
AH00094: Command line: '/usr/sbin/apache2'
[Wed Sep 28 06:25:14.040425 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:15.041505 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:16.042554 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:17.043605 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:18.045062 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:19.046130 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:20.047475 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 06:25:21.048295 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
... <repeats non-stop>
ull, not at MaxRequestWorkers
[Wed Sep 28 12:53:25.662213 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 12:53:26.663278 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 12:53:27.664325 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 12:53:28.665413 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
[Wed Sep 28 12:53:29.666492 2016] [mpm_event:error] [pid 1895:tid
140037883340672] AH00485: scoreboard is full, not at MaxRequestWorkers
The errors stopped when I restarted the apache2 service with sudo service
apache2 restart.
I couldn't tell where to find the core. There was only this file from a week
ago:
$ ls -l _usr_sbin_apache2.0.crash
-rw-r----- 1 root root 2526598 Sep 21 22:33 _usr_sbin_apache2.0.crash
I tried to rerun it again and timestamp changed but core info did not
appear to change.
I have collected access and error logs of the past couple of days as
well as other logs including maas logs. Tarball is attached to this bug
and it contains the 2 crash files:
$ ls -l _usr_sbin_apache2.0.crash.*
-rw-r----- 1 ubuntu ubuntu 2698755 Sep 28 13:42 _usr_sbin_apache2.0.crash.new
-rw-r----- 1 ubuntu ubuntu 2526598 Sep 21 22:33 _usr_sbin_apache2.0.crash.old
These are the package versions:
ii maas 2.0.0+bzr5189-0 all "Metal as a Service"
is a physical cloud and I
ii apache2 2.4.18-2ubuntu3.1
amd64 Apache HTTP Server
ii apache2-bin 2.4.18-2ubuntu3.1
amd64 Apache HTTP Server (modules and other binary files)
ii apache2-data 2.4.18-2ubuntu3.1
all Apache HTTP Server (common files)
ii apache2-utils 2.4.18-2ubuntu3.1
amd64 Apache HTTP Server (utility programs for web servers)
ii init 1.29ubuntu2
amd64 System-V-like init utilities - metapackage
$ lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
** Affects: maas
Importance: Undecided
Status: New
** Affects: apache2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: oil
** Attachment added: "apache2.logs.tar.gz"
https://bugs.launchpad.net/bugs/1628535/+attachment/4750157/+files/apache2.logs.tar.gz
** Summary changed:
- AH00493: SIGUSR1 received. Doing graceful restart - Apache2 crashes
+ AH00493: SIGUSR1 received. Doing graceful restart - Apache2 crashes - Can't
access maas server URL
** Also affects: maas
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1628535
Title:
AH00493: SIGUSR1 received. Doing graceful restart - Apache2 crashes -
Can't access maas server URL
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