bind/doc/notes/notes-9.19.11.rst

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Notes for BIND 9.19.11
----------------------

New Features
~~~~~~~~~~~~

- When using :any:`dnssec-policy`, it is now possible to configure the
  digest type to use when ``CDS`` records need to be published with
  :any:`cds-digest-types`. Also, publication of specific CDNSKEY/CDS
  records can now be set with :option:`dnssec-signzone -G`. :gl:`#3837`

Removed Features
~~~~~~~~~~~~~~~~

- Support for Red Hat Enterprise Linux version 7 (and clones) has been
  dropped. A C11-compliant compiler is now required to compile BIND 9.
  :gl:`#3729`

- The functions that were in the ``libbind9`` shared library have been
  moved to the ``libisc`` and ``libisccfg`` libraries. The now-empty
  ``libbind9`` has been removed and is no longer installed. :gl:`#3903`

- The ``irs_resconf`` module has been moved to the ``libdns`` shared
  library. The now-empty ``libirs`` library has been removed and is no
  longer installed. :gl:`#3904`

Feature Changes
~~~~~~~~~~~~~~~

- libuv support for receiving multiple UDP messages in a single
  ``recvmmsg()`` system call has been tweaked several times between
  libuv versions 1.35.0 and 1.40.0; the current recommended libuv
  version is 1.40.0 or higher. New rules are now in effect for running
  with a different version of libuv than the one used at compilation
  time. These rules may trigger a fatal error at startup:

  - Building against or running with libuv versions 1.35.0 and 1.36.0 is
    now a fatal error.

  - Running with libuv version higher than 1.34.2 is now a fatal error
    when :iscman:`named` is built against libuv version 1.34.2 or lower.

  - Running with libuv version higher than 1.39.0 is now a fatal error
    when :iscman:`named` is built against libuv version 1.37.0, 1.38.0,
    1.38.1, or 1.39.0.

  This prevents the use of libuv versions that may trigger an assertion
  failure when receiving multiple UDP messages in a single system call.
  :gl:`#3840`

- Catalog zone updates are now run on specialized "offload" threads to
  reduce the amount of time they block query processing on the main
  networking threads. This increases the responsiveness of
  :iscman:`named` when catalog zone updates are being applied after a
  catalog zone has been successfully transferred. :gl:`#3881`

Bug Fixes
~~~~~~~~~

- :iscman:`named` could crash with an assertion failure when adding a
  new zone into the configuration file for a name which was already
  configured as a member zone for a catalog zone. This has been fixed.
  :gl:`#3911`

Known Issues
~~~~~~~~~~~~

- There are no new known issues with this release. See :ref:`above
  <relnotes_known_issues>` for a list of all known issues affecting this
  BIND 9 branch.