Public bug reported:
System:
VM running on ESXI 6.0
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Package:
bind9:
Installed: 1:9.11.3+dfsg-1ubuntu1.3
Candidate: 1:9.11.3+dfsg-1ubuntu1.3
Version table:
*** 1:9.11.3+dfsg-1ubuntu1.3 500
500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
100 /var/lib/dpkg/status
1:9.11.3+dfsg-1ubuntu1.2 500
500 http://archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages
1:9.11.3+dfsg-1ubuntu1 500
500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
3. Expected to happen: After issuing the command "sudo netplan apply"
with no network changes bind to continue to run as it had.
This happened once to reapply config, and once during a "Daily apt
upgrade and clean activities"
4. After the netplan apply completed within 2 minutes we started seeing
timeouts and long response times from the server. We have 2 identical
builds currently running as caching servers for a large network, the
servers were built on the same day and have both experienced the issue.
These servers are under heavy load and are replying to 100's of queries
a second or more. When investigating the logs for bind and the syslog
there are no indications of maximum number of connections, maximum open
files, or any other limits reached. Though there are noticed dropped
packets and external monitoring on the bind service begins to flap, and
manual testing shows some queries timing out.
Issuing a "sudo systemctl restart bind9" instantly resolves the issue.
If there is any other information you need please let me know, but I am
unsure of where to look as the named log, kernel log, and syslog are all
clear of errors during the timeout issue.
** Affects: bind9 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1811554
Title:
bind9 slow response after netplan apply
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