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</header>
<p>This document describes the changes made to the Kernel application.</p>
-<section><title>Kernel 5.0</title>
-
- <section><title>Fixed Bugs and Malfunctions</title>
- <list>
- <item>
- <p>The handling of <c>on_load</c> functions has been
- improved. The major improvement is that if a code upgrade
- fails because the <c>on_load</c> function fails, the
- previous version of the module will now be retained.</p>
- <p>
- Own Id: OTP-12593</p>
- </item>
- <item>
- <p><c>rpc:call()</c> and <c>rpc:block_call()</c> would
- sometimes cause an exception (which was not mentioned in
- the documentation). This has been corrected so that
- <c>{badrpc,Reason}</c> will be returned instead.</p>
- <p>
- Own Id: OTP-13409</p>
- </item>
- <item>
- <p>On Windows, for modules that were loaded early (such
- as the <c>lists</c> module), <c>code:which/1</c> would
- return the path with mixed slashes and backslashes, for
- example: <c>"C:\\Program
- Files\\erl8.0/lib/stdlib-2.7/ebin/lists.beam"</c>. This
- has been corrected.</p>
- <p>
- Own Id: OTP-13410</p>
- </item>
- <item>
- <p>
- Use fsync instead of fdatasync on Mac OSX.</p>
- <p>
- Own Id: OTP-13411</p>
- </item>
- <item>
- <p>
- The default chunk size for the fallback sendfile
- implementation, used on platforms that do not have a
- native sendfile, has been decreased in order to reduce
- connectivity issues.</p>
- <p>
- Own Id: OTP-13444</p>
- </item>
- <item>
- <p>
- Huges writes (2Gb or more) could fail on some Unix
- platforms (for example, OS X and FreeBSD).</p>
- <p>
- Own Id: OTP-13461</p>
- </item>
- <item>
- <p>
- A bug has been fixed where the DNS resolver inet_res did
- not refresh its view of the contents of for example
- resolv.conf immediately after start and hence then failed
- name resolution. Reported and fix suggested by Michal
- Ptaszek in GitHUB pull req #949.</p>
- <p>
- Own Id: OTP-13470 Aux Id: Pull #969 </p>
- </item>
- <item>
- <p>
- Fix process leak from global_group. Thanks to Xuming who
- reported and fixed this!</p>
- <p>
- Own Id: OTP-13516 Aux Id: PR-1008 </p>
- </item>
- <item>
- <p>
- The function <c>inet:gethostbyname/1</c> now honors the
- resolver option <c>inet6</c> instead of always looking up
- IPv4 addresses.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-13622 Aux Id: PR-1065 </p>
- </item>
- <item>
- <p>
- The <c>Status</c> argument to <c>init:stop/1</c> is now
- sanity checked to make sure <c>erlang:halt</c> does not
- fail.</p>
- <p>
- Own Id: OTP-13631 Aux Id: PR-911 </p>
- </item>
- </list>
- </section>
-
-
- <section><title>Improvements and New Features</title>
- <list>
- <item>
- <p>
- Added <seealso
- marker="kernel:os#perf_counter/1">os:perf_counter/1</seealso>.</p>
- <p>
- The perf_counter is a very very cheap and high resolution
- timer that can be used to timestamp system events. It
- does not have monoticity guarantees, but should on most
- OS's expose a monotonous time.</p>
- <p>
- Own Id: OTP-12908</p>
- </item>
- <item>
- <p>
- The os:cmd call has been optimized on unix platforms to
- be more performant as the number of schedulers increase.</p>
- <p>
- Own Id: OTP-13089</p>
- </item>
- <item>
- <p>New functions that can load multiple functions at once
- have been added to the '<c>code</c>' module. The
- functions are <c>code:atomic_load/1</c>,
- <c>code:prepare_loading/1</c>,
- <c>code:finish_loading/1</c>, and
- <c>code:ensure_modules_loaded/1</c>.</p>
- <p>
- Own Id: OTP-13111</p>
- </item>
- <item>
- <p>
- The code path cache feature turned out not to be very
- useful in practice and has been removed. If an attempt is
- made to enable the code path cache, there will be a
- warning report informing the user that the feature has
- been removed.</p>
- <p>
- Own Id: OTP-13191</p>
- </item>
- <item>
- <p>When an attempt is made to start a distributed Erlang
- node with the same name as an existing node, the error
- message will be much shorter and easier to read than
- before. Example:</p>
- <p><c>Protocol 'inet_tcp': the name somename@somehost
- seems to be in use by another Erlang node</c></p>
- <p>
- Own Id: OTP-13294</p>
- </item>
- <item>
- <p>
- The output of the default error logger is somewhat
- prettier and easier to read. The default error logger is
- used during startup of the OTP system. If the start-up
- fails, the output will be easier to read.</p>
- <p>
- Own Id: OTP-13325</p>
- </item>
- <item>
- <p>The functions <c>rpc:safe_multi_server_call/2,3</c>
- that were deprecated in R12B have been removed.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-13449</p>
- </item>
- <item>
- <p>
- Update the error reasons in dist_util, and show them in
- the logs if net_kernel:verbose(1) has been called.</p>
- <p>
- Own Id: OTP-13458</p>
- </item>
- <item>
- <p>
- Experimental support for Unix Domain Sockets has been
- implemented. Read the sources if you want to try it out.
- Example: <c>gen_udp:open(0,
- [{ifaddr,{local,"/tmp/socket"}}])</c>. Documentation will
- be written after user feedback on the experimental API.</p>
- <p>
- Own Id: OTP-13572 Aux Id: PR-612 </p>
- </item>
- </list>
- </section>
-
-</section>
-
<section><title>Kernel 4.2</title>
<section><title>Fixed Bugs and Malfunctions</title>