Erlang/OTP 19.3 is the third service release for the 19 major release. The service release contains mostly bug fixes and characteristics improvements but also some new features.

Some highlights for 19.3

• crypto, ssh: The implementation of the key exchange algorithms diffie-hellman-group-exchange-sha* are optimized, up to a factor of 11 for the slowest ( = biggest and safest) group size.

• dialyzer: The peak memory consumption is reduced. Analyzing modules with binary construction with huge strings is now much faster.

• erts: A received SIGTERM signal to beam will generate a 'stop' message to the init process and terminate the Erlang VM nicely. This is equivalent to calling init:stop/0.

• kernel: The functions in the file module that take a list of

paths (e.g. file:path_consult/2) will now continue to search in the path if the path contains something that is not a directory.

• kernel: Two OTP processes that are known to receive many

messages are rex (used by rpc) and error_logger. Those processes will now store unprocessed messages outside the process heap, which will potentially decrease the cost of garbage collections.

• public_key: New function pkix_verify_hostname/2,3 implements

certificate hostname checking. See the manual and RFC 6125.

• public_key, ssh: The ssh host key fingerprint generation now also takes a list of algorithms and returns a list of corresponding fingerprints. See public_key:ssh_hostkey_fingerprint/2 and the option
  silently_accept_hosts in ssh:connect.

• ssl: Move PEM cache to a dedicated process, to avoid making

the SSL manager process a bottleneck. This improves scalability of TLS connections.

• stdlib: filename:safe_relative_path/1 to sanitize a relative

path has been added.

• Thanks to more than 20 different contributors

You can find the README and the full listing of changes for this service release at

http://www.erlang.org/download/otp_src_19.3.readme

The source distribution and binary distributions for Windows can be downloaded from

http://www.erlang.org/download/otp_src_19.3.tar.gz http://www.erlang.org/download/otp_win32_19.3.exe http://www.erlang.org/download/otp_win64_19.3.exe

Note: To unpack the TAR archive you need a GNU TAR compatible program.

For installation instructions please consult the README file that is part of the distribution.

The Erlang/OTP source can also be found at GitHub on the official Erlang repository, https://github.com/erlang/otp with tag OTP-19.3

The on-line documentation can be found at: http://www.erlang.org/doc/ You can also download the complete HTML documentation or the Unix manual files

http://www.erlang.org/download/otp_doc_html_19.3.tar.gz http://www.erlang.org/download/otp_doc_man_19.3.tar.gz

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

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