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Diffstat (limited to 'lib/kernel/doc/src/notes.xml')
| -rw-r--r-- | lib/kernel/doc/src/notes.xml | 514 |
1 files changed, 506 insertions, 8 deletions
diff --git a/lib/kernel/doc/src/notes.xml b/lib/kernel/doc/src/notes.xml index b8db22aba7..5bcc0b7c09 100644 --- a/lib/kernel/doc/src/notes.xml +++ b/lib/kernel/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2013</year> + <year>2004</year><year>2016</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -31,6 +31,490 @@ </header> <p>This document describes the changes made to the Kernel application.</p> +<section><title>Kernel 5.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix a memory leak when calling + seq_trace:get_system_tracer().</p> + <p> + Own Id: OTP-13742</p> + </item> + <item> + <p> + Fix for the problem that when adding the ebin directory + of an application to the code path, the + <c>code:priv_dir/1</c> function returns an incorrect path + to the priv directory of the same application.</p> + <p> + Own Id: OTP-13758 Aux Id: ERL-195 </p> + </item> + <item> + <p> + Fix code_server crash when adding code paths of two + levels.</p> + <p> + Own Id: OTP-13765 Aux Id: ERL-194 </p> + </item> + <item> + <p> + Respect -proto_dist switch while connection to EPMD</p> + <p> + Own Id: OTP-13770 Aux Id: PR-1129 </p> + </item> + <item> + <p> + Fixed a bug where init:stop could deadlock if a process + with infinite shutdown timeout (e.g. a supervisor) + attempted to load code while terminating.</p> + <p> + Own Id: OTP-13802</p> + </item> + <item> + <p> + Close stdin of commands run in os:cmd. This is a + backwards compatiblity fix that restores the behaviour of + pre 19.0 os:cmd.</p> + <p> + Own Id: OTP-13867 Aux Id: seq13178 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Add <c>net_kernel:setopts/2</c> and + <c>net_kernel:getopts/2</c> to control options for + distribution sockets in runtime.</p> + <p> + Own Id: OTP-13564</p> + </item> + </list> + </section> + +</section> + +<section><title>Kernel 5.0.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + When calling os:cmd from a process that has set trap_exit + to true an 'EXIT' message would be left in the message + queue. This bug was introduced in kernel vsn 5.0.1.</p> + <p> + Own Id: OTP-13813</p> + </item> + </list> + </section> + +</section> + +<section><title>Kernel 5.0.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fix a os:cmd bug where creating a background job using + & would cause os:cmd to hang until the background job + terminated or closed its stdout and stderr file + descriptors. This bug has existed from kernel 5.0.</p> + <p> + Own Id: OTP-13741</p> + </item> + </list> + </section> + +</section> + +<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> + Make file:datasync 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> + Large file 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.</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> + Add {line_delim, byte()} option to inet:setopts/2 and + decode_packet/3</p> + <p> + Own Id: OTP-12837</p> + </item> + <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 scale better with the number of schedulers.</p> + <p> + Own Id: OTP-13089</p> + </item> + <item> + <p>New functions that can load multiple modules 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 start-up 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> + <item> + <p> + Allow heart to be configured to not kill the previous + emulator before calling the HEART_COMMAND. This is done + by setting the environment variable HEART_NO_KILL to + TRUE.</p> + <p> + Own Id: OTP-13650</p> + </item> + </list> + </section> + +</section> + +<section><title>Kernel 4.2</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p><c>code:load_abs([10100])</c> would bring down the + entire runtime system and create a crash dump. Corrected + to generate an error exception in the calling + process.</p> + <p>Also corrected specs for code loading functions and + added more information in the documentation about the + error reasons returned by code-loading functions.</p> + <p> + Own Id: OTP-9375</p> + </item> + <item> + <p> + <seealso + marker="kernel:gen_tcp#accept/2"><c>gen_tcp:accept/2</c></seealso> + was not <seealso + marker="erts:time_correction#Time_Warp_Safe_Code">time + warp safe</seealso>. This since it used the same time as + returned by <seealso + marker="erts:erlang#now/0"><c>erlang:now/0</c></seealso> + when calculating timeout. This has now been fixed.</p> + <p> + Own Id: OTP-13254 Aux Id: OTP-11997, OTP-13222 </p> + </item> + <item> + <p> Correct the contract for <c>inet:getifaddrs/1</c>. + </p> + <p> + Own Id: OTP-13335 Aux Id: ERL-95 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Time warp safety improvements.</p> + <p> + Introduced the options <c>monotonic_timestamp</c>, and + <c>strict_monotonic_timestamp</c> to the trace, + sequential trace, and system profile functionality. This + since the already existing <c>timestamp</c> option is not + time warp safe.</p> + <p> + Introduced the option <c>safe_fixed_monotonic_time</c> to + <c>ets:info/2</c> and <c>dets:info/2</c>. This since the + already existing <c>safe_fixed</c> option is not time + warp safe.</p> + <p> + Own Id: OTP-13222 Aux Id: OTP-11997 </p> + </item> + <item> + <p> + Add validation callback for heart</p> + <p> + The erlang heart process may now have a validation + callback installed. The validation callback will be + executed, if present, before any heartbeat to heart port + program. If the validation fails, or stalls, no heartbeat + will be sent and the node will go down.</p> + <p> + With the option <c>'check_schedulers'</c> heart executes + a responsiveness check of the schedulers before a + heartbeat is sent to the port program. If the + responsiveness check fails, the heartbeat will not be + performed (as intended).</p> + <p> + Own Id: OTP-13250</p> + </item> + <item> + <p> + Clarify documentation of <c>net_kernel:allow/1</c></p> + <p> + Own Id: OTP-13299</p> + </item> + <item> + <p> + EPMD supports both IPv4 and IPv6</p> + <p> + Also affects oldest supported windows version.</p> + <p> + Own Id: OTP-13364</p> + </item> + </list> + </section> + +</section> + +<section><title>Kernel 4.1.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Host name lookups though inet_res, the Erlang DNS + resolver, are now done case insensitively according to + RFC 4343. Patch by Holger Weiß.</p> + <p> + Own Id: OTP-12836</p> + </item> + <item> + <p> + IPv6 distribution handler has been updated to share code + with IPv4 so that all features are supported in IPv6 as + well. A bug when using an IPv4 address as hostname has + been fixed.</p> + <p> + Own Id: OTP-13040</p> + </item> + <item> + <p> + Caching of host names in the internal DNS resolver + inet_res has been made character case insensitive for + host names according to RFC 4343.</p> + <p> + Own Id: OTP-13083</p> + </item> + <item> + <p>Cooked file mode buffering has been fixed so + file:position/2 now works according to Posix on Posix + systems i.e. when file:position/2 returns an error the + file pointer is unaffected.</p> <p>The Windows system + documentation, however, is unclear on this point so the + documentation of file:position/2 still does not promise + anything.</p> <p>Cooked file mode file:pread/2,3 and + file:pwrite/2,3 have been corrected to honor character + encoding like the combination of file:position/2 and + file:read/2 or file:write/2 already does. This is + probably not very useful since the character + representation on the caller's side is latin1, + period.</p> + <p> + Own Id: OTP-13155 Aux Id: PR#646 </p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Add {line_delim, byte()} option to inet:setopts/2 and + decode_packet/3</p> + <p> + Own Id: OTP-12837</p> + </item> + </list> + </section> + +</section> + +<section><title>Kernel 4.1</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p>A mechanism for limiting the amount of text that the + built-in error logger events will produce has been + introduced. It is useful for limiting both the size of + log files and the CPU time used to produce them.</p> + <p>This mechanism is experimental in the sense that it + may be changed if it turns out that it does not solve the + problem it is supposed to solve. In that case, there may + be backward incompatible improvements to this + mechanism.</p> + <p>See the documentation for the config parameter + <c>error_logger_format_depth</c> in the Kernel + application for information about how to turn on this + feature.</p> + <p> + Own Id: OTP-12864</p> + </item> + </list> + </section> + +</section> + <section><title>Kernel 4.0</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -159,6 +643,22 @@ </section> +<section><title>Kernel 3.2.0.1</title> + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p>The 'raw' socket option could not be used multiple times + in one call to any e.g gen_tcp function because only one + of the occurrences were used. This bug has been fixed, + and also a small bug concerning propagating error codes + from within inet:setopts/2.</p> + <p>Own Id: OTP-11482 Aux Id: seq12872 </p> + </item> + </list> + </section> + </section> + + <section><title>Kernel 3.2</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -423,8 +923,7 @@ Erlang/OTP has been ported to the realtime operating system OSE. The port supports both smp and non-smp emulator. For details around the port and how to started - see the User's Guide in the <seealso - marker="ose:ose_intro">ose</seealso> application. </p> + see the User's Guide in the ose application. </p> <p> Note that not all parts of Erlang/OTP has been ported. </p> <p> @@ -1192,7 +1691,7 @@ </item> <item> <p> Fix returned error from gen_tcp:accept/1,2 when - running out of ports + running out of ports.</p> <p> The {error, enfile} return value is badly misleading and confusing for this case, since the Posix ENFILE errno @@ -1201,7 +1700,7 @@ {error, system_limit}, which is consistent with e.g. various file(3) functions. inet:format_error/1 has also been updated to support system_limit in the same manner - as file:format_error/1. (Thanks to Per Hedeland)</p></p> + as file:format_error/1. (Thanks to Per Hedeland)</p> <p> Own Id: OTP-9990</p> </item> @@ -1396,7 +1895,6 @@ Own Id: OTP-9764</p> </item> <item> - <p> <list> <item><p>Correct callback spec in application module</p></item> <item><p>Refine warning about callback specs with extra ranges</p></item> <item><p>Cleanup @@ -1407,7 +1905,7 @@ analysis</p></item> <item><p>Fix crash in Dialyzer</p></item> <item><p>Variable substitution was not generalizing any unknown variables.</p></item> - </list></p> + </list> <p> Own Id: OTP-9776</p> </item> @@ -3052,7 +3550,7 @@ types (for instance, <c>ensure_loaded/1</c> now only accepts an atom as documented; it used to accept a string too).</p> - <p><c>Dialyzer</c> will generally emit warnings for any + <p>Dialyzer will generally emit warnings for any calls that use undocumented argument types. Even if the call happens to still work in R12B, you should correct your code. A future release will adhere to the |