[dnsdist] Second alpha release of dnsdist 1.6.0
remi.gacogne at powerdns.com
Thu Mar 4 17:53:14 UTC 2021
We are happy to announce the second alpha release of dnsdist 1.6.0.
This release contains mostly fixes for issues reported in the first
- A race condition was found to sometimes occur at startup, making it
possible for the first TCP connection to happen before the creation
of TCP workers and lead to a crash.
- Stéphane Bortzmeyer reported many TCP timeouts with the first alpha
that did not happen with 1.5.x. We unfortunately did not manage to
reproduce these timeouts, but we spent quite some time expanding the
coverage of our TCP code, uncovering several bugs in the process.
Although we unfortunately cannot be sure that the issue experienced by
Stéphane has been fixed, the resulting code has seen much more
testing and we have received excellent feedback from other users in
the meantime, leading to this second alpha candidate.
- The cache cleaning algorithm did not properly remove expired entries
from all shards, when more than one shard was used and
"setCacheCleaningPercentage" set below 100%. This led to a drop in the
cache efficiency in the long run.
- A null pointer dereference has been found when accessing a dynamic
BPF block (DynBPF) object in client mode.
- A debug line was not properly removed in the web server code, logging
a new line for every HTTP query.
In addition to these fixes, Sander Hoentjen contributed several
improvements to allow spoofing answers with multiple records, and Aki
Tuomi introduced automatic conversion to string for several objects in
Lua. Many thanks to them!
Please see the dnsdist website  for the more complete changelog 
and the current documentation.
Please send us all feedback and issues you might have via the mailing
list, or in case of a bug, via GitHub .
The tarball (signature) is available from our download server  and
packages for CentOS 7 and 8, Debian Buster and Ubuntu Bionic and Focal
are available from our repository .
With the future 1.6.0 final release, the 1.3.x releases will be EOL and
the 1.4.x releases will go into critical security fixes only mode.
We would also like to take this opportunity to announce that we will
stop supporting systems using 32-bit time. This includes 32-bit Linux
platforms like arm and i386 before kernel version 5.1.
PowerDNS.COM BV - https://www.powerdns.com/
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