Erlang.org News RSS

Erlang OTP 22.1 is released

Wed, 18 Sep 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

Potential Incompatibilities

Mnesia: Transactions with sticky locks could with async_asym transactions be committed in the wrong order, since asym transactions are spawned on the remote nodes. To fix this bug the communication protocol between mnesia nodes had to be updated, thus mnesia will no longer be able to connect to nodes earlier than mnesia-4.14 ,first realeased in OTP-19.0.
Stdlib: Debugging of time-outs in gen_statem has been improved. Starting a time-out is now logged in sys:log and sys:trace. Running time-outs are visible in server crash logs, and with sys:get_status. Due to this system events {start_timer, Action, State} and {insert_timout, Event, State} have been added, which may surprise tools that rely on the format of these events. New features: The EventContent of a running time-out can be updated with {TimeoutType, update, NewEventContent}. Running time-outs can be cancelled with {TimeoutType, cancel} which is more readable than using Time = infinity.{rel, Name, Vsn, RelApps, Opts}.

Highlights

Compiler:

erlc can now automatically use a compile server to avoid starting an Erlang system for each file to be compiled in a multi-file project. See the documentation for how to enable it.

Standard libraries:

SSL: Basic support for TLS 1.3 Client for experimental use. For more information see the Standards Compliance chapter of the User's Guide.
crypto: The Message Authentication Codes (MAC) CMAC, HMAC and Poly1305 are unified into common functions in the New Crypto API. See the manual for CRYPTO. cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

For more details see
http://erlang.org/download/otp_src_22.1.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.1.exe
http://erlang.org/download/otp_win64_22.1.exe

Online documentation can be browsed here:
http://erlang.org/doc/search/

The source tarball can be fetched here:
http://erlang.org/download/otp_src_22.1.tar.gz
The documentation can be fetched here:
http://erlang.org/download/otp_doc_html_22.1.tar.gz
The man pages can be fetched here:
http://erlang.org/download/otp_doc_man_22.1.tar.gz

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.1

Thank you for all your contributions!

OTP 22.1

Tue, 17 Sep 2019 00:00:00 GMT

Potential Incompatibilities

Mnesia: Transactions with sticky locks could with async_asym transactions be committed in the wrong order, since asym transactions are spawned on the remote nodes. To fix this bug the communication protocol between mnesia nodes had to be updated, thus mnesia will no longer be able to connect to nodes earlier than mnesia-4.14 ,first realeased in OTP-19.0.
Stdlib: Debugging of time-outs in gen_statem has been improved. Starting a time-out is now logged in sys:log and sys:trace. Running time-outs are visible in server crash logs, and with sys:get_status. Due to this system events {start_timer, Action, State} and {insert_timout, Event, State} have been added, which may surprise tools that rely on the format of these events. New features: The EventContent of a running time-out can be updated with {TimeoutType, update, NewEventContent}. Running time-outs can be cancelled with {TimeoutType, cancel} which is more readable than using Time = infinity.{rel, Name, Vsn, RelApps, Opts}.

Highlights

Compiler:

erlc can now automatically use a compile server to avoid starting an Erlang system for each file to be compiled in a multi-file project. See the documentation for how to enable it.

Standard libraries:

SSL: Basic support for TLS 1.3 Client for experimental use. For more information see the Standards Compliance chapter of the User's Guide.
crypto: The Message Authentication Codes (MAC) CMAC, HMAC and Poly1305 are unified into common functions in the New Crypto API. See the manual for CRYPTO. cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

For more details see
http://erlang.org/download/otp_src_22.1.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.1.exe
http://erlang.org/download/otp_win64_22.1.exe

Online documentation can be browsed here:
http://erlang.org/doc/search/

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.1

Thank you for all your contributions!

Eighteenth ACM SIGPLAN Erlang Workshop, Berlin, Germany, August 18, 2019

Sun, 18 Aug 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

The Erlang Workshop aims to bring together the open source, academic, and industrial communities of Erlang, to discuss technologies and languages related to Erlang. The Erlang model of concurrent programming has been widely emulated, for example by Akka in Scala, and even new programming languages were designed atop of the Erlang VM, such as Elixir. Therefore we would like to broaden the scope of the workshop to include systems like those mentioned above. For more info see http://erlang.org/workshop/2019/

Code BEAMSTO 2019, Stockholm 16-17 May

Thu, 16 May 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

Code BEAM STO is the only conference in Europe to bring Erlang, Elixir, and all of the languages that run on the BEAM together.

Find out more on the website: https://www.codesync.global/conferences/code-beam-sto-2019/

OTP 22.0

Wed, 15 May 2019 00:00:00 GMT

OTP 22.0

Erlang/OTP 22 is a new major release with new features and improvements as well as incompatibilities.

For a deeper dive into the hightligts of the OTP 22 release, you can read our blog here:

http://blog.erlang.org/OTP-22-Highlights/

Potential Incompatibilities

gen_* behaviours: If logging of the last N messages through sys:log/2,3 is active for the server, this log is included in the terminate report.
reltool: A new element, Opts, can now be included in a rel tuple in the reltool release specific configuration format: {rel, Name, Vsn, RelApps, Opts}.
All external pids/ports/refs created by erlang:list_to_pid and similar functions now compare equal to any other pid/port/ref with same number from that node.
The old legacy erl_interface library is deprecated as of OTP 22, and will be removed in OTP 23. This does not apply to the ei library.
VxWorks is deprecated as of OTP 22 and will be removed in OTP 23.

Erts:

Support for Erlang Distribution protocol to split the payload of large signals into several fragments.
ETS option write_concurrency now also effects and improves scalability of ordered_set tables.
The length/1 BIF used to calculate the length of the list in one go without yielding, even if the list was very long. Now it yields when called with long lists.
A new (still experimental) module socket is introduced. It is implemented as a NIF and the idea is that it shall be as "close as possible" to the OS level socket interface.
Added the NIF function enif_term_type, which helps avoid long sequences of enif_is_xyz by returning the type of the given term. This is especially helpful for NIFs that serialize terms, such as JSON encoders, where it can improve both performance and readability.

Compiler:

The compiler has been rewritten to internally use an intermediate representation based on Static Single Assignment (SSA). The new intermediate representation makes more optimizations possible.
- The binary matching optimizations are now applicable in many more circumstances than before.
- Type optimizations are now applied across local function calls, and will remove a lot more redundant type tests than before.
All compiler options that can be given in the source file can now be given in the option list on the command line for erlc.
In OTP 22, HiPE (the native code compiler) is not fully functional. The reasons for this are new BEAM instructions for binary matching that the HiPE native code compiler does not support. If erlc is invoked with the +native option, and if any of the new binary matching instructions are used, the compiler will issue a warning and produce a BEAM file without native code.

Standard libraries:

Cover now uses the counters module instead of ets for updating counters. The new function cover:local_only/0 allows running Cover in a restricted but faster local-only mode. The increase in speed will vary depending on the type of code being cover-compiled, as an example the compiler test suite runs more than twice as fast with the new Cover.
A simple socket API is provided through the socket module. This is a low level API that does *not* replace gen_[tcp|udp|sctp]. It is intended to *eventually* replace the inet driver. It also provides a basic API that facilitates the implementation of other protocols than TCP, UDP and SCTP. Known issues are; No support for the Windows OS (currently), a small term leakage. This feature will be classed as experimental in OTP 22.
SSL: now uses the new logger API, including log levels and verbose debug logging.
SSL: Basic support for TLS 1.3 Server for experimental use.
crypto: The new hash_info/1 and cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

For more details see
http://erlang.org/download/otp_src_22.0.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.0.exe
http://erlang.org/download/otp_win64_22.0.exe

Online documentation can be browsed here:
http://erlang.org/doc/search/

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.0

Thank you for all your contributions!

Erlang OTP 22.0 is released

Tue, 14 May 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

OTP 22.0

Erlang/OTP 22 is a new major release with new features and improvements as well as incompatibilities.

For a deeper dive into the highlights of the OTP 22 release, you can read our blog here:

http://blog.erlang.org/OTP-22-Highlights/

Potential Incompatibilities

gen_* behaviours: If logging of the last N messages through sys:log/2,3 is active for the server, this log is included in the terminate report.
reltool: A new element, Opts, can now be included in a rel tuple in the reltool release specific configuration format: {rel, Name, Vsn, RelApps, Opts}.
All external pids/ports/refs created by erlang:list_to_pid and similar functions now compare equal to any other pid/port/ref with same number from that node.
The old legacy erl_interface library is deprecated as of OTP 22, and will be removed in OTP 23. This does not apply to the ei library.
VxWorks is deprecated as of OTP 22 and will be removed in OTP 23.

New Features

Erts:

Support for Erlang Distribution protocol to split the payload of large messages into several fragments.
ETS option write_concurrency now also effects and improves scalability of ordered_set tables.
The length/1 BIF used to calculate the length of the list in one go without yielding, even if the list was very long. Now it yields when called with long lists.
A new (still experimental) module socket is introduced. It is implemented as a NIF and the idea is that it shall be as "close as possible" to the OS level socket interface.
Added the NIF function enif_term_type, which helps avoid long sequences of enif_is_xyz by returning the type of the given term. This is especially helpful for NIFs that serialize terms, such as JSON encoders, where it can improve both performance and readability.

Compiler:

The compiler has been rewritten to internally use an intermediate representation based on Static Single Assignment (SSA). The new intermediate representation makes more optimizations possible.
- The binary matching optimizations are now applicable in many more circumstances than before.
- Type optimizations are now applied across local function calls, and will remove a lot more redundant type tests than before.
All compiler options that can be given in the source file can now be given in the option list on the command line for erlc.
In OTP 22, HiPE (the native code compiler) is not fully functional. The reasons for this are new BEAM instructions for binary matching that the HiPE native code compiler does not support. If erlc is invoked with the +native option, and if any of the new binary matching instructions are used, the compiler will issue a warning and produce a BEAM file without native code.

Standard libraries:

Cover now uses the counters module instead of ets for updating counters. The new function cover:local_only/0 allows running Cover in a restricted but faster local-only mode. The increase in speed will vary depending on the type of code being cover-compiled, as an example the compiler test suite runs more than twice as fast with the new Cover.
A simple socket API is provided through the socket module. This is a low level API that does *not* replace gen_[tcp|udp|sctp]. It is intended to *eventually* replace the inet driver. It also provides a basic API that facilitates the implementation of other protocols than TCP, UDP and SCTP. Known issues are; No support for the Windows OS (currently), a small term leakage. This feature will be classed as experimental in OTP 22.
SSL: now uses the new logger API, including log levels and verbose debug logging.
SSL: Basic support for TLS 1.3 Server for experimental use.
crypto: The new hash_info/1 and cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

For more details see
http://erlang.org/download/otp_src_22.0.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.0.exe
http://erlang.org/download/otp_win64_22.0.exe

Online documentation can be browsed here:
http://erlang.org/doc/search/

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.0

Thank you for all your contributions!

Erlang OTP 22.0-rc3 is available for testing!

Wed, 24 Apr 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

This is the 3rd release candidate for OTP 22.0

Erlang/OTP 22 is a new major release with new features and improvements as well as incompatibilities.

There are no major highlight for this release, as the main focus of this is bugfixes and polish.

Please consult the readme for a detailed changelog for the release.

The intention with this release is to get feedback from our users. All feedback is welcome, even if it is only to say that it works for you, as it lets us know that the release candidate got some testing.

Highlights in release candidate 2

Potential Incompatibilities

gen_* behaviours: If logging of the last N messages through sys:log/2,3 is active for the server, this log is included in the terminate report.
reltool: A new element, Opts, can now be included in a rel tuple in the reltool release specific configuration format: {rel, Name, Vsn, RelApps, Opts}.
All external pids/ports/refs created by erlang:list_to_pid and similar functions now compare equal to any other pid/port/ref with same number from that node.
The old legacy erl_interface library is deprecated as of OTP 22, and will be removed in OTP 23. This does not apply to the ei library.
VxWorks is deprecated as of OTP 22 and will be removed in OTP 23.

Additional highlights in release candidate 2

A simple socket API is provided through the socket module. This is a low level API that does *not* replace gen_[tcp|udp|sctp]. It is intended to *eventually* replace the inet driver. It also provides a basic API that facilitates the implementation of other protocols than TCP, UDP and SCTP. Known issues are; No support for the Windows OS (currently), a small term leakage. This feature will be classed as experimental in OTP 22.
ssl: Basic support for TLS 1.3 Server for experimental use.
In OTP 22, HiPE (the native code compiler) is not fully functional. The reasons for this are new BEAM instructions for binary matching that the HiPE native code compiler does not support. If erlc is invoked with the +native option, and if any of the new binary matching instructions are used, the compiler will issue a warning and produce a BEAM file without native code.
erts: Added the NIF function enif_term_type, which helps avoid long sequences of enif_is_xyz by returning the type of the given term. This is especially helpful for NIFs that serialize terms, such as JSON encoders, where it can improve both performance and readability.
crypto: The new hash_info/1 and cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

Highlights in release candidate 1

Erts:

Support for Erlang Distribution protocol to split the payload of large signals into several fragments.
ETS option write_concurrency now also effects and improves scalability of ordered_set tables.
The length/1 BIF used to calculate the length of the list in one go without yielding, even if the list was very long. Now it yields when called with long lists.
A new (still experimental) module socket is introduced. It is implemented as a NIF and the idea is that it shall be as "close as possible" to the OS level socket interface.

Compiler:

The compiler has been rewritten to internally use an intermediate representation based on Static Single Assignment (SSA). The new intermediate representation makes more optimizations possible.
- The binary matching optimizations are now applicable in many more circumstances than before.
- Type optimizations are now applied across local function calls, and will remove a lot more redundant type tests than before.
All compiler options that can be given in the source file can now be given in the option list on the command line for erlc.

Standard libraries:

Cover now uses the counters module instead of ets for updating counters. The new function cover:local_only/0 allows running Cover in a restricted but faster local-only mode. The increase in speed will vary depending on the type of code being cover-compiled, as an example the compiler test suite runs more than twice as fast with the new Cover.
SSL now uses the new logger API, including log levels and verbose debug logging.

For more details see
http://erlang.org/download/otp_src_22.0-rc3.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.0-rc3.exe
http://erlang.org/download/otp_win64_22.0-rc3.exe

Online documentation can be browsed here:
http://erlang.org/documentation/doc-11.0-rc3/doc

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.0-rc3

Thank you for all your contributions!

Erlang OTP 22.0-rc2 is available for testing!

Wed, 27 Mar 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

OTP 22 Release Candidate 2

This is the second of three planned release candidates before the OTP 22 release.

Erlang/OTP 22 is a new major release with new features and improvements as well as incompatibilities.

Potential Incompatibilities

gen_* behaviours: If logging of the last N messages through sys:log/2,3 is active for the server, this log is included in the terminate report.
reltool: A new element, Opts, can now be included in a rel tuple in the reltool release specific configuration format: {rel, Name, Vsn, RelApps, Opts}.
All external pids/ports/refs created by erlang:list_to_pid and similar functions now compare equal to any other pid/port/ref with same number from that node.
The old legacy erl_interface library is deprecated as of OTP 22, and will be removed in OTP 23. This does not apply to the ei library.
VxWorks is deprecated as of OTP 22 and will be removed in OTP 23.

Additional highlights in release candidate 2

A simple socket API is provided through the socket module. This is a low level API that does *not* replace gen_[tcp|udp|sctp]. It is intended to *eventually* replace the inet driver. It also provides a basic API that facilitates the implementation of other protocols than TCP, UDP and SCTP. Known issues are; No support for the Windows OS (currently), a small term leakage. This feature will be classed as experimental in OTP 22.
ssl: Basic support for TLS 1.3 Server for experimental use.
In OTP 22, HiPE (the native code compiler) is not fully functional. The reasons for this are new BEAM instructions for binary matching that the HiPE native code compiler does not support. If erlc is invoked with the +native option, and if any of the new binary matching instructions are used, the compiler will issue a warning and produce a BEAM file without native code.
erts: Added the NIF function enif_term_type, which helps avoid long sequences of enif_is_xyz by returning the type of the given term. This is especially helpful for NIFs that serialize terms, such as JSON encoders, where it can improve both performance and readability.
crypto: The new hash_info/1 and cipher_info/1 functions returns maps with information about the hash or cipher in the argument.

Highlights in release candidate 1

Erts:

Support for Erlang Distribution protocol to split the payload of large signals into several fragments.
ETS option write_concurrency now also effects and improves scalability of ordered_set tables.
The length/1 BIF used to calculate the length of the list in one go without yielding, even if the list was very long. Now it yields when called with long lists.
A new (still experimental) module socket is introduced. It is implemented as a NIF and the idea is that it shall be as "close as possible" to the OS level socket interface.

Compiler:

The compiler has been rewritten to internally use an intermediate representation based on Static Single Assignment (SSA). The new intermediate representation makes more optimizations possible.
- The binary matching optimizations are now applicable in many more circumstances than before.
- Type optimizations are now applied across local function calls, and will remove a lot more redundant type tests than before.
All compiler options that can be given in the source file can now be given in the option list on the command line for erlc.

Standard libraries:

Cover now uses the counters module instead of ets for updating counters. The new function cover:local_only/0 allows running Cover in a restricted but faster local-only mode. The increase in speed will vary depending on the type of code being cover-compiled, as an example the compiler test suite runs more than twice as fast with the new Cover.
SSL now uses the new logger API, including log levels and verbose debug logging.

For more details see
http://erlang.org/download/otp_src_22.0-rc2.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_22.0-rc2.exe
http://erlang.org/download/otp_win64_22.0-rc2.exe

Online documentation can be browsed here:
http://erlang.org/documentation/doc-11.0-rc2/doc

The Erlang/OTP source can also be found at GitHub on the official Erlang repository:

https://github.com/erlang/otp

OTP-22.0-rc2

Thank you for all your contributions!

OTP 21.3

Wed, 13 Mar 2019 00:00:00 GMT

OTP 21.3

Erlang/OTP 21.3 is the third service release for version 21 release with, improvements as well as a few features!

Highlights

Kernel:

The standard logger handler, logger_std_h, now has a new internal feature for log rotation. For full information see the documentation.

SSL:

The Reason part of the error return from the functions connect and handshake has a better and documented format. This is a potential incompatibility. See the documentation.
Refactoring of state handling has improved the TLS application data throughput and reduced CPU overhead
Code optimizations has reduced CPU load for encryption/decryption, especially for Erlang's distribution protocol over TLS
Now supports active N

Erl_interface:

Support for plugin of a user supplied socket implementation has been added.

OTP:

The HTML reference documentation now shows the OTP version where modules and functions were first introduced.
Versions of OTP older than R13B04 is not shown in the reference documentation

For a full list of details see:
http://erlang.org/download/otp_src_21.3.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_21.3.exe
http://erlang.org/download/otp_win64_21.3.exe

Online documentation can be browsed here:
http://erlang.org/documentation/doc-10.3/doc

The Erlang/OTP source can also be found at GitHub on the official Erlang repository, Here: OTP-21.2

Please report any new issues via Erlang/OTPs public issue tracker

https://bugs.erlang.org

We want to thank all of those who sent us patches, suggestions and bug

reports!

Thank you!

The Erlang/OTP Team at Ericsson

Erlang OTP 21.3 is released

Wed, 13 Mar 2019 00:00:00 GMT

img src=http://www.erlang.org/upload/news/

OTP 21.3

Erlang/OTP 21.3 is the third service release for version 21 release with, improvements as well as a few features!

Highlights

Kernel:

The standard logger handler, logger_std_h, now has a new internal feature for log rotation. For full information see the documentation.

SSL:

The Reason part of the error return from the functions connect and handshake has a better and documented format. This is a potential incompatibility. See the documentation.
Refactoring of state handling has improved the TLS application data throughput and reduced CPU overhead
Code optimizations has reduced CPU load for encryption/decryption, especially for Erlang's distribution protocol over TLS
Now supports active N

Erl_interface:

Support for plugin of a user supplied socket implementation has been added.

OTP:

The HTML reference documentation now shows the OTP version where modules and functions were first introduced.
Versions of OTP older than R13B04 is not shown in the reference documentation

For a full list of details see:
http://erlang.org/download/otp_src_21.3.readme

Pre built versions for Windows can be fetched here:
http://erlang.org/download/otp_win32_21.3.exe
http://erlang.org/download/otp_win64_21.3.exe

Online documentation can be browsed here:
http://erlang.org/documentation/doc-10.3/doc

The Erlang/OTP source can also be found at GitHub on the official Erlang repository, Here: OTP-21.2

Please report any new issues via Erlang/OTPs public issue tracker

https://bugs.erlang.org

We want to thank all of those who sent us patches, suggestions and bug

reports!

Thank you!

The Erlang/OTP Team at Ericsson