Simple Message Queue (formerly MNS):Java SDK release notes

Features

• Improved the error message for BatchSendMessage when oversized message bodies are blocked.

• Added the messageGroupId property to the message class for FIFO message support.

• Topic message attributes now support the new versions of email and text message subscription clients.

Breaking changes

• Minimum JDK version raised to JDK 8.

Download: GitHub Releases

Bug fixes

• Fixed a serialization parsing exception that occurred when consuming messages from a dead-letter queue (DLQ) in certain scenarios.

Download: GitHub Releases

Features

• Added user-defined attributes and system attributes to the message class.

Download: GitHub Releases

Features

• Changed the default socketTimeout value to 40 seconds.

• Deprecated message count-related properties and methods in the QueueMeta class. Use CloudMonitor APIs to retrieve these metrics instead.

Bug fixes

• Fixed a jaxb-runtime incompatibility in the JDK 8 runtime environment.

• Fixed an issue where some requests timed out in extreme scenarios.

Download: GitHub Releases

Dependencies

• Upgraded aliyun-java-sdk-core to version 4.7.1.

Breaking changes

• Receiving or deleting messages from a queue now requires explicit exception handling. Catch and handle exceptions to prevent uncaught exceptions from interrupting loop-based execution (such as a while loop).

Download: GitHub Releases

Features

• Improved the readability of the [Message]:null error message for invalid BatchDeleteMessage requests.

Download: GitHub Releases

Features

• AccessKey ID and AccessKey secret can now be loaded from environment variables. For more information, see Configure endpoints and credentials.

• Queue-based and topic-based message production and consumption now support optional Base64 encoding and decoding.

• Added sample code for the preceding features.

• Added sample code for sending and consuming large files.

• A RequestId is now returned when sending or publishing a message to simplify troubleshooting.

Bug fixes

• Fixed a 500 error caused by the concurrent sample code in the official documentation.

• Fixed an issue where retrieving a message from a queue still triggered a long wait even when waitseconds was set to 0.

• Fixed a getCredentials inconsistency that caused request failures in extreme scenarios.

• Fixed incorrect client version reporting that returned an old version or the SDK version of a different product.

Other changes

• Sample code moved from the main directory to the test directory.

Download: GitHub Releases

Dependencies

• Replaced the Log4j dependency with SLF4J.

Download: aliyun-sdk-mns-1.1.9.1.jar

Features

• Added support for the OpenService API.

Bug fixes

• Fixed the client throwing an I/O reactor status: STOPPED exception due to network jitter in certain scenarios.

Download: aliyun-sdk-mns-1.1.9.jar

Features

• Added a batch text message sending API for topic subscriptions.

Download: aliyun-sdk-mns-1.1.8.8.jar

Features

• The getMNSClient method now returns the same Java object across multiple calls.

• Added a JSON format option for topic subscriptions.

Bug fixes

• General bug fixes.

Download: aliyun-sdk-mns-1.1.7.1.jar

Features

• Added one-to-many message broadcasting.

• Added sample code for Java SDK performance testing.

Download: aliyun-sdk-mns-1.1.5.jar

Features

• Queues and email addresses are now supported as subscription endpoints.

• Added message filtering for topics.

Bug fixes

• Fixed long polling request timeouts caused by the number of requests exceeding maxConnectionsPerRoute.

Download: aliyun-sdk-mns-1.1.4.jar

Features

• Added HTTPS support.

Breaking changes

• Removed the default initial values of priority, dequeueCount, and delaySeconds in the Message object.

Download: aliyun-sdk-mns-1.1.3.jar

Bug fixes

• Fixed an issue where the waitseconds parameter for popMessage used the value from QueueMeta instead of 0 when no parameter was passed.

Download: aliyun-sdk-mns-1.1.2.jar

Bug fixes

• Fixed an issue where Chinese messages were encoded in UTF-8 instead of the platform's default character set.

Download: aliyun-sdk-mns-1.1.1.jar

Features

• Added topic support for publish/subscribe messaging.

• Added Security Token Service (STS) token support.

• Base64 encoding for messages is now optional.

Download: aliyun-sdk-mns-1.1.0.jar

Bug fixes

• Fixed a memory leak that occurred when multiple CloudAccount objects existed.

Dependencies

• Upgraded httpasyncclient to version 4.1.

Download: aliyun-sdk-mns-1.0.5.jar

Bug fixes

• Fixed thread aborts in extreme cases of network abnormalities.

• Fixed the resident thread that reclaims idle connections after they are closed.

Download: aliyun-sdk-mns-1.0.4.jar

Features

• Added support for BatchSendMessage, BatchReceiveMessage, BatchPeekMessage, and BatchDeleteMessage.

• Added sample code.

Bug fixes

• Fixed SDK hangs caused by too many connections in the CLOSE_WAIT state.

Other changes

• Upgraded the API protocol version: x-mns-version=2015-06-06.

Download: aliyun-sdk-mns-1.0.3.jar

Other changes

• Optimized XML parsing logic for improved performance.

Download: aliyun-sdk-mqs-1.0.2.jar

Other changes

• Increased the default thread pool size to 50, resolving a performance bottleneck during high-concurrency synchronization.

Download: aliyun-sdk-mqs-1.0.1.jar