> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/connectors/c/3.1/3.1.5.md).

# Connector/C 3.1.5 Release Notes

Release notes for MariaDB Connector/C 3.1.5, a Stable (GA) release published 11 November 2019.

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<p align="center">The most recent release of <a href="/docs/connectors/mariadb-connector-c.md">MariaDB Connector/C</a> is: <a href="/docs/release-notes/connectors/c/3.4/3.4.11.md"><strong>3.4.11</strong></a></p>

<p align="center"><a href="https://mariadb.com/downloads/connectors/connectors-data-access/c-connector" class="button primary">Download Connector/C 3.4.11</a></p>
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[Download](https://mariadb.com/downloads/#connectors)[Release Notes](/docs/release-notes/connectors/c/3.1/3.1.5.md)[Changelog](/docs/release-notes/connectors/c/changelogs/3.1/3.1.5.md)[About MariaDB Connector/C](/docs/connectors/mariadb-connector-c.md)

**Release date:** 11 Nov 2019

This is a [***Stable (GA)***](/docs/release-notes/community-server/about/release-criteria.md) release of the MariaDB\
Connector/C, formerly known as MariaDB Client Library for C.

**For a description of this library see the**[**MariaDB Connector/C**](/docs/connectors/mariadb-connector-c.md) **page.**

## Notable Changes

* [MDEV-20469](https://jira.mariadb.org/browse/MDEV-20469): Plugin dialog could not be loaded (wrong path)
* [ODBC-440](https://jira.mariadb.org/browse/ODBC-440): Fixed typo in sha256\_password cmake configuration
* [CONC-418](https://jira.mariadb.org/browse/CONC-418): For unknown/not handled schannel error codes FormatMessage function will be used instead of returning "Unknown error" message.
* [CONC-417](https://jira.mariadb.org/browse/CONC-417), [MDEV-13492](https://jira.mariadb.org/browse/MDEV-13492): At irregular intervals older windows versions (prior Windows 10) fail to establish a secure (TLS) connection and return errors SEC\_E\_INVALID\_TOKEN, SEC\_E\_BUFFER\_TOO\_SMALL or SEC\_E\_MESSAGE\_ALTERED. This is a bug in windows schannel library and was only fixed in recent versions, also OpenSSL provided a workaround (see [1350](https://github.com/openssl/openssl/pull/1350)). Since we are unable to fix this, in case of an error during TLS handshake the errorcode Connector/C will try to reconnect up to three times if the error code was SEC\_E\_INVALID\_TOKEN, SEC\_E\_BUFFER\_TOO\_SMALL or SEC\_E\_MESSAGE\_ALTERED.
* Included in [MariaDB 10.4.10](/docs/release-notes/community-server/old-releases/10.4/10.4.10.md), [MariaDB 10.3.20](/docs/release-notes/community-server/old-releases/10.3/10.3.20.md), and [MariaDB 10.2.29](/docs/release-notes/community-server/old-releases/10.2/10.2.29.md)

## Changelog

For a list of changes made in this release, with links to detailed information on each push, see the [changelog](/docs/release-notes/connectors/c/changelogs/3.1/3.1.5.md).

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Be notified of new MariaDB Server releases automatically by [subscribing](https://lists.mariadb.org/postorius/lists/announce.lists.mariadb.org/) to the MariaDB Foundation community announce 'at' lists.mariadb.org announcement list (this is a low traffic, announce-only list). MariaDB plc customers will be notified for all new releases, security issues and critical bug fixes for all MariaDB plc products thanks to the Notification Services.

MariaDB may already be included in your favorite OS distribution. More information can be found on the [Distributions which Include MariaDB](/docs/general-resources/distributions-including-mariadb.md) page.
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