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Notes for BIND 9.16.5
---------------------

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

- New ``rndc`` command ``rndc dnssec -status`` shows the current DNSSEC
  policy and keys in use, the key states, and rollover status.
  :gl:`#1612`

Bug Fixes
~~~~~~~~~

- A race condition could occur if a TCP socket connection was closed
  while ``named`` was waiting for a recursive response. The attempt to
  send a response over the closing connection triggered an assertion
  failure in the function ``isc__nm_tcpdns_send()``. :gl:`#1937`

- A race condition could occur when ``named`` attempted to use a UDP
  interface that was shutting down. This triggered an assertion failure
  in ``uv__udp_finish_close()``. :gl:`#1938`

- Fix assertion failure when server was under load and root zone had not
  yet been loaded. :gl:`#1862`

- ``named`` could crash when cleaning dead nodes in ``lib/dns/rbtdb.c``
  that were being reused. :gl:`#1968`

- ``named`` crashed on shutdown when a new ``rndc`` connection was
  received during shutdown. This has been fixed. :gl:`#1747`

- The DS RRset returned by ``dns_keynode_dsset()`` was used in a
  non-thread-safe manner. This could result in an INSIST being
  triggered. :gl:`#1926`

- Properly handle missing ``kyua`` command so that ``make check`` does
  not fail unexpectedly when CMocka is installed, but Kyua is not.
  :gl:`#1950`

- The ``primary`` and ``secondary`` keywords, when used as parameters
  for ``check-names``, were not processed correctly and were being
  ignored. :gl:`#1949`

- ``rndc dnstap -roll <value>`` did not limit the number of saved files
  to ``<value>``. :gl:`!3728`

- The validator could fail to accept a properly signed RRset if an
  unsupported algorithm appeared earlier in the DNSKEY RRset than a
  supported algorithm. It could also stop if it detected a malformed
  public key. :gl:`#1689`

- The ``blackhole`` ACL was inadvertently disabled for client queries.
  Blocked IP addresses were not used for upstream queries but queries
  from those addresses could still be answered. :gl:`#1936`

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.