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    ApsaraMQ for RocketMQ:Release notes for the TCP client SDK for C++

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    ApsaraMQ for RocketMQ:Release notes for the TCP client SDK for C++

    Last Updated:Mar 11, 2026

    The following release notes cover all versions of the TCP client SDK for C++, including release dates, download links, and changes. Select a version that meets your business requirements to send and receive messages.

    Before you begin

    Set up your development environment after downloading the SDK:

    Version compatibility

    Important

    SDK V3.x.x only supports instances that contain namespaces. If your instance does not contain a namespace, do not upgrade to V3.x.x.

    All ApsaraMQ for RocketMQ 5.x instances contain namespaces by default. For ApsaraMQ for RocketMQ 4.x instances, check whether your instance contains a namespace in the Basic Information section of the Instance Details page in the ApsaraMQ for RocketMQ console.

    V3.x.x

    V3.x.x (2021-10-18)

    Download: ons-client-cpp on GitHub

    Note

    For a full list of API changes in this release, see Release notes.

    Improvements

    • Load balancing: Now message-based, distributing loads more evenly across consumers.

    • Dashboard: Added metrics for accumulated message count, duration, and success rate of each step from production to consumption.

    • Message trace: Trace query results now include parameters for scheduled messages, delayed messages, transactional messages, and message consumption.

    • Ordered messages: The maximum retry count is now 16.

    • Broadcasting consumption: The consumer offset can be set when starting a consumer.

    • Push mode: Added consumption throttling. Optimized processing logic for abnormal consumption thread counts.

    Earlier versions

    1.1.0

    Release dateDescriptionDownload link for WindowsDownload link for Linux
    2017-07-25

    Fixed issues

    • The following issue is fixed: Core dumps are caused when a consumer is shut down.
    • The following issue is fixed: Access over HTTP is unavailable to the underlying URL class in Windows.
    • The following issue is fixed: Timestamp errors occur in message traces.
    • The following issue is fixed: Incorrect local IP addresses are displayed in message traces.
    • Memory leaks in Windows are fixed.
    		aliyun-mq-windows-cpp-sdk.zipaliyun-mq-linux-cpp-sdk.tar.gz

    1.0.9

    Release dateDescriptionDownload link for WindowsDownload link for Linux
    2016-12-29

    Added features

    • Messages can be sent in one-way mode.
    • Ordered messages are supported.
    • The timeout period for sending messages can be set.
    • The maximum number of retries for messages can be set.

    Fixed issues

    • Resource leaks during shutdown are fixed.
    • Core dumps during shutdown are fixed.
    		None.None.

    1.0.8

    Release dateDescriptionDownload link for WindowsDownload link for Linux
    2016-12-02

    Added features

    • The earlier version of the SDK for C# is no longer supported. An updated version of the SDK for C# is generated by using SWIG. The updated version provides more stable support for ASP.NET.
    • Log paths can be customized.
    • Built-in UTF-8 encoding is provided to support implicit encoding and decoding.
    • The MQ_GUIDE documentation is provided. The ASP.NET demo is provided.

    Optimized features

    • The boost library is updated to V1.6.2.

    Fixed issues

    • The following issue is fixed: Core dumps occur when the producers or consumers of ordered messages are shut down.
    		None.None.

    1.0.7

    Release dateDescriptionDownload link for WindowsDownload link for Linux
    2016-11-15

    Added features

    • Consumption throttling is supported for consumers. By default, 1,000 messages are pulled and stored in the memory and then called back by the callback function one by one.
    • Ordered messages are supported.
    • The timeout period for sending messages can be set.
    • The maximum number of retries for messages can be set.

    Optimized features

    • The message tracing feature is optimized. A separate thread pool is used to send trace data.
    • The granularity of the TCP lock is optimized.

    Fixed issues

    • Issues related to message tracing are fixed.
    • Core dumps caused by shutdown are fixed.
    • Memory leaks are fixed.
    • The following issue is fixed: An exception is thrown if a message tag contains double vertical bars (||).
    		None.None.