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[Launchpad Bug Tracker <1578001@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package logwatch -
7.4.3+git20161207-2ubuntu1.2

---------------
logwatch (7.4.3+git20161207-2ubuntu1.2) bionic; urgency=medium

  [ Bryce Harrington ]
  * d/p/0020-dhcpd-Ignore-lease-age-under-threshold-messages.patch:
    dhcpd: Ignore lease age under threshold messages
    (LP: #1578001)
  * d/p/0018-audit-Treat-Denial-Errors-same-as-Denied.patch:
    audit: Treat Denial-Errors same as Denied.
    (LP: #1577948)
  * d/p/0017-audit-Apparmor-DENIED-entries-don-t-always-include-p.patch:
    audit: Apparmor DENIED entries don't always include parent=N.
    (LP: #1577948)
  * d/p/0014-zz-sys-Suppress-warnings-if-Sys-CPU-or-Sys-MemInfo-a.patch:
    zz-sys: Suppress warnings if Sys::CPU or Sys::MemInfo are missing.
    These are not installed by default in Ubuntu's logwatch packaging.
    (LP: #1890749)
  * d/p/0012-postfix-Handle-backwards-compatible-mode.patch:
    postfix: Handle backwards-compatible mode.
    (LP: #1583705)
  * d/p/0011-postfix-Ignore-Resolved-loghost-to-127.0.0.1.patch:
    postfix: Ignore Resolved loghost to 127.0.0.1.
    (LP: #1583705)
  * d/p/0010-00-debspecific-disable-su-reporting-in-secure.diff.patch:
    Use $PATH to determine location of zpool and zfs.
    (LP: #1880211)

  [ Karl Stenerud ]
  * d/p/ssh-ignore-disconnected.patch:
    sshd: ignore disconnected from user USER
    (LP: #1644057)

 -- Bryce Harrington <bryce@xxxxxxxxxxxxx>  Thu, 03 Sep 2020 04:21:53
+0000

** Changed in: logwatch (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

** Changed in: logwatch (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1578001

Title:
  unmatched entries for isc-dhcp-server

Status in logwatch package in Ubuntu:
  Fix Released
Status in logwatch source package in Xenial:
  Fix Released
Status in logwatch source package in Bionic:
  Fix Released
Status in logwatch source package in Focal:
  Fix Released
Status in logwatch source package in Groovy:
  Fix Released

Bug description:
  [Impact]

  dhcp "lease under threshold" messages aren't handled by logwatch, and
  thus end up in the "Unmatched Entries" section, one per event. These
  innocuous notices clutters up the logwatch reports unnecessarily.

  [Test Case]

  $ export CODENAME="focal"
  $ lxc launch ubuntu:${CODENAME} test-logwatch
  $ lxc exec test-logwatch -- bash

  # apt-get update
  # apt-get dist-upgrade -y
  # apt-get install -y logwatch

  # wget https://bugs.launchpad.net/ubuntu/+source/logwatch/+bug/1578001/+attachment/5407062/+files/unmatched-entries-isc-dhcp-server%3Akern.log
  # cat unmatched-entries-isc-dhcp-server:kern.log >> /var/log/kern.log

  # logwatch --detail High --service all --range all --output stdout

  Without the fix, there will be unmatched entries from reuse_lease
  regarding lease age thresholds; with the fix there will be no such
  messages.

  (Note: For testing it's not really necessary to trigger the original
  condition that produces the log entry, since for Logwatch the purpose
  is more about making sure the entry is detected and processed
  appropriately.)

  [Regression Potential]

  Since logwatch filters logs for errors pertinent to administrators,
  standard things to watch out for are undesired changes in this filtering
  behavior, such as flagging or failing to flag issues differently than
  before, other than the specific messages being filtered with this
  change.

  
  [Original Report]
  Under the "dhcpd" heading, the following isc-dhcp-server lines appear as unknown:

  Unknown Entries:
    Config file: /etc/dhcp/dhcpd.conf: 1 Time(s)
    Database file: /var/lib/dhcp/dhcpd.leases: 1 Time(s)
    PID file: /run/dhcp-server/dhcpd.pid: 1 Time(s)
    Server starting service.: 1 Time(s)
    reuse_lease: lease age 16261 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 16268 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 16391 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 16394 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 1728 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 17474 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 17475 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 26177 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 26179 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 28852 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 28854 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 3064 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 3229 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 35305 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 35325 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 35326 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 49459 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 52188 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)
    reuse_lease: lease age 811 (secs) under 25% threshold, reply with unaltered, existing lease: 1 Time(s)

  -----------------------------------------------------------------
  Description: Ubuntu 16.04 LTS
  Release: 16.04

  logwatch:
    Installed: 7.4.2-1ubuntu1
    Candidate: 7.4.2-1ubuntu1
    Version table:
   *** 7.4.2-1ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages
          100 /var/lib/dpkg/status

  isc-dhcp-server:
    Installed: 4.3.3-5ubuntu12
    Candidate: 4.3.3-5ubuntu12
    Version table:
   *** 4.3.3-5ubuntu12 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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