** Description changed:

- Good afternoon.  
- I have started seeing something very similar to Debian Dug 734688 "Logs are 
not rotated for a month" but in the latest Ubuntu LTS (16.04).  I seem to have 
+ [Impact]
+ 
+ Logrotate fails to rotate a log and then will continue to fail to rotate
+ it until manual intervention takes place. If messaging has not been
+ configured on the system there will be no warning issued to the user.
+ The log will grow day by day until a user intervenes or the drive that
+ the log is stored on is full.
+ 
+ Very large log files can make it more difficult to find useful data.
+ Full drives make the rest of the system fail to operate. Backporting a
+ fix would prevent drives filling up on stable releases.
+ 
+ [Test Case]
+ 
+ Go to your logs area (/var/logs) and create a file with a name ending
+ .2, as would be created part way through the logrotate process. So if
+ you have /var/log/syslog, /var/log/syslog.1, /var/log/syslog.2.gz,
+ /var/log/syslog.3.gz; create a new file named /var/log/syslog.2. Your
+ subsequent log rotate runs will fail.
+ 
+ [Regression Potential]
+ 
+ - I'd hope the potential is low as it only triggers under certain conditions 
that are special (target filename in the way).
+ - So far in those conditions it failed to rotate
+ - Yet If despite my hope there still manifests an issue I'd expect it could 
be renaming files it should not, so people would end up "missing" their logs - 
the good thing is that this is a rename, so they should find it at different 
names.
+ - Another thing I consider possible is that some unexpected conditions cause 
e.g. a crash in the changed code, in that case the logs are not rotated, but 
since there is no unlink the logs will still exist.
+ - Therefore I consider the Potential low enough to consider the fix.
+ 
+ [Other Info]
+ n/a
+ 
+ ---
+ 
+ Good afternoon.
+ I have started seeing something very similar to Debian Dug 734688 "Logs are 
not rotated for a month" but in the latest Ubuntu LTS (16.04).  I seem to have
  $ logrotate --version
  logrotate 3.8.7
  bundled in it.  A few weeks ago I started getting root emails such as this:
  > Subject: Cron <root@warden> test -x /usr/sbin/anacron || ( cd / && 
run-parts --report /etc/cron.daily )
  >
  > /etc/cron.daily/logrotate:
  > error: error creating output file /var/log/munin/munin-node.log.1: File 
exists
  > run-parts: /etc/cron.daily/logrotate exited with return code 1
- When I inspected the area of concern I was able to see that there was an 
existing .1 file.  
+ When I inspected the area of concern I was able to see that there was an 
existing .1 file.
  manager@warden:/var/log/munin$ ll
  total 580
  drwxr-xr-x  2 munin adm      4096 Sep 27 06:31 ./
  drwxr-xr-x 13 root  syslog   4096 Oct  5 06:26 ../
  -rw-r--r--  1 root  root     3440 Sep 26 13:39 munin-node-configure.log
  -rw-r--r--  1 root  root   490251 Oct  5 10:25 munin-node.log
  -rw-r--r--  1 root  root    56598 Sep 21 02:01 munin-node.log.1
  -rw-r--r--  1 root  root    24576 Aug 31 02:01 munin-node.log.2
  -rw-r--r--  1 root  root     1906 Sep 19 06:25 munin-node.log.8.gz
- The contents of the munin-node.log file seem to run from the 19th September 
until today.  Unlike other parts of this bug the .1 and .2 files do not seem to 
be already compressed.  
+ The contents of the munin-node.log file seem to run from the 19th September 
until today.  Unlike other parts of this bug the .1 and .2 files do not seem to 
be already compressed.
  
  I deleted all but the munin-node.log file to see if it would resolve the 
problem and was going to leave it at that.  Then I noticed that I have had 
another Ubuntu machine which has been sending similar emails for the past week:
  > Subject: Cron <root@trac> test -x /usr/sbin/anacron || ( cd / && run-parts 
--report /etc/cron.daily )
  >
  > /etc/cron.daily/logrotate:
  > error: error creating output file /var/log/syslog.1.gz: File exists
  > run-parts: /etc/cron.daily/logrotate exited with return code 1
- Different file, different machine but a very similar error message.  
- 
- Checking on the syslog file I can see that it better fits with other reports 
on this bug as my duplicated .1 files has a corresponding .1.gz file.  
+ Different file, different machine but a very similar error message.
+ 
+ Checking on the syslog file I can see that it better fits with other reports 
on this bug as my duplicated .1 files has a corresponding .1.gz file.
  manager@trac:/var/log$ ll syslog*
  -rw-r----- 1 syslog adm 918492 Oct  5 10:30 syslog
  -rw-r----- 1 syslog adm 125819 Sep 30 06:25 syslog.1
  -rw-r----- 1 syslog adm  20638 Oct  2 02:01 syslog.1.gz
  -rw-r----- 1 syslog adm  41989 Sep 30 02:00 syslog.2.gz
  -rw-r----- 1 syslog adm  18654 Sep 28 02:01 syslog.3.gz
  -rw-r----- 1 syslog adm  31720 Sep 26 06:40 syslog.4.gz
  -rw-r----- 1 syslog adm  33151 Sep 25 02:01 syslog.5.gz
  -rw-r----- 1 syslog adm  17290 Sep 23 02:01 syslog.6.gz
  -rw-r----- 1 syslog adm  39275 Sep 21 06:35 syslog.7.gz
  
  There has been some speculation that a full or nearly full /var
  partition would cause this issue.  I can confirm that /var is part of /
  on my systems and that presently both of them have several gigabytes of
  space.  I run Munin an Icinga to monitor system state.  Neither of these
  show / being completely full in the past month.  They have both had
  /boot fill significantly.  Trac had a highest use value of / being
  99.28% full in the past year  but warden has only had a peak of 33% in
  the past year.
  
- A quick search of the internet suggests a couple of other people reporting 
similar issues: 
+ A quick search of the internet suggests a couple of other people reporting 
similar issues:
  https://github.com/gitlabhq/gitlabhq/issues/6894
- 
http://raspberrypi.stackexchange.com/questions/22545/why-are-system-logs-not-rotating
 
+ 
http://raspberrypi.stackexchange.com/questions/22545/why-are-system-logs-not-rotating
  
  I do not believe that I have altered by logrotate configuration files but 
here is a copy of the ones I know about:
- $ cat /etc/logrotate.conf 
+ $ cat /etc/logrotate.conf
  # see "man logrotate" for details
  # rotate log files weekly
  weekly
  
  # use the syslog group by default, since this is the owning group
  # of /var/log/syslog.
  su root syslog
  
  # keep 4 weeks worth of backlogs
  rotate 4
  
  # create new (empty) log files after rotating old ones
  create
  
  # uncomment this if you want your log files compressed
  #compress
  
  # packages drop log rotation information into this directory
  include /etc/logrotate.d
  
  # no packages own wtmp, or btmp -- we'll rotate them here
  /var/log/wtmp {
-     missingok
-     monthly
-     create 0664 root utmp
-     rotate 1
+     missingok
+     monthly
+     create 0664 root utmp
+     rotate 1
  }
  
  /var/log/btmp {
-     missingok
-     monthly
-     create 0660 root utmp
-     rotate 1
+     missingok
+     monthly
+     create 0660 root utmp
+     rotate 1
  }
  
  # system-specific logs may be configured here
  
- $ cat /etc/logrotate.d/rsyslog 
+ $ cat /etc/logrotate.d/rsyslog
  /var/log/syslog
  {
-             rotate 7
-             daily
-             missingok
-             notifempty
-             delaycompress
-             compress
-             postrotate
-                         reload rsyslog >/dev/null 2>&1 || true
-             endscript
+             rotate 7
+             daily
+             missingok
+             notifempty
+             delaycompress
+             compress
+             postrotate
+                         reload rsyslog >/dev/null 2>&1 || true
+             endscript
  }
  
  /var/log/mail.info
  /var/log/mail.warn
  /var/log/mail.err
  /var/log/mail.log
  /var/log/daemon.log
  /var/log/kern.log
  /var/log/auth.log
  /var/log/user.log
  /var/log/lpr.log
  /var/log/cron.log
  /var/log/debug
  /var/log/messages
  {
-             rotate 4
-             weekly
-             missingok
-             notifempty
-             compress
-             delaycompress
-             sharedscripts
-             postrotate
-                         reload rsyslog >/dev/null 2>&1 || true
-             endscript
- }
- 
- manager@trac:/var/log$ cat /etc/logrotate.d/munin-node 
+             rotate 4
+             weekly
+             missingok
+             notifempty
+             compress
+             delaycompress
+             sharedscripts
+             postrotate
+                         reload rsyslog >/dev/null 2>&1 || true
+             endscript
+ }
+ 
+ manager@trac:/var/log$ cat /etc/logrotate.d/munin-node
  /var/log/munin/munin-node.log {
-             daily
-             missingok
-             rotate 7
-             compress
-             copytruncate
-             notifempty
-             create 640 root root
+             daily
+             missingok
+             rotate 7
+             compress
+             copytruncate
+             notifempty
+             create 640 root root
  }
  
  I am confident that is all the files which are relative to the configuration:
  manager@trac:/var/log$ rgrep syslog /etc/logrotate.*
  /etc/logrotate.conf:# use the syslog group by default, since this is the 
owning group
  /etc/logrotate.conf:# of /var/log/syslog.
  /etc/logrotate.conf:su root syslog
  /etc/logrotate.d/ufw:                invoke-rc.d rsyslog reload >/dev/null 
2>&1 || true
  /etc/logrotate.d/rsyslog:/var/log/syslog
  /etc/logrotate.d/rsyslog:                       reload rsyslog >/dev/null 
2>&1 || true
  /etc/logrotate.d/rsyslog:                       reload rsyslog >/dev/null 
2>&1 || true
  manager@trac:/var/log$ rgrep munin /etc/logrotate.*
  /etc/logrotate.d/munin-node:/var/log/munin/munin-node.log
  
  If there is anything else I can do to help diagnose the issue please let
  me know.
  
- Usual boiler plate bits: 
+ Usual boiler plate bits:
  "trac" machine:
  $ lsb_release -rd
  Description:  Ubuntu 14.04.5 LTS
  Release:      14.04
  
  $ apt-cache policy logrotate
  logrotate:
-   Installed: 3.8.7-1ubuntu1
-   Candidate: 3.8.7-1ubuntu1
-   Version table:
-  *** 3.8.7-1ubuntu1 0
-         500 http://gb.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
-         100 /var/lib/dpkg/status
+   Installed: 3.8.7-1ubuntu1
+   Candidate: 3.8.7-1ubuntu1
+   Version table:
+  *** 3.8.7-1ubuntu1 0
+         500 http://gb.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
+         100 /var/lib/dpkg/status
  
  "warden" machine:
  $ lsb_release -rd
  Description:  Ubuntu 16.04.1 LTS
  Release:      16.04
  
- $ apt-cache policy logrotate 
+ $ apt-cache policy logrotate
  logrotate:
-   Installed: 3.8.7-2ubuntu2
-   Candidate: 3.8.7-2ubuntu2
-   Version table:
-  *** 3.8.7-2ubuntu2 500
-         500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
-         100 /var/lib/dpkg/status
+   Installed: 3.8.7-2ubuntu2
+   Candidate: 3.8.7-2ubuntu2
+   Version table:
+  *** 3.8.7-2ubuntu2 500
+         500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
+         100 /var/lib/dpkg/status
  N: Ignoring file '50unattended-upgrades.ucf-dist' in directory 
'/etc/apt/apt.conf.d/' as it has an invalid filename extension
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: logrotate 3.8.7-1ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-42.49~14.04.1-generic 4.2.8-ckt12
  Uname: Linux 4.2.0-42-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  Date: Wed Oct  5 11:14:53 2016
  InstallationDate: Installed on 2015-12-14 (295 days ago)
  InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 
(20150805)
  SourcePackage: logrotate
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1630516

Title:
  Logrotate doesn't clean old system logs, allowing them to fill the
  disk

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