Changes by Version
==================
Release Notes.

8.3.0
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#### Project

#### Java Agent
* Support propagate the sending timestamp in MQ plugins to calculate the transfer latency in the async MQ scenarios.
* Support auto-tag with the fixed values propagated in the correlation context.   
* Make HttpClient 3.x, 4.x, and HttpAsyncClient 3.x plugins to support collecting HTTP parameters.
* Make the Feign plugin to support Java 14
* Make the okhttp3 plugin to support Java 14
* Polish tracing context related codes.

#### OAP-Backend
* Add the `@SuperDataset` annotation for BrowserErrorLog.
* Add the thread pool to the Kafka fetcher to increase the performance.
* Add `contain` and `not contain` OPS in OAL.
* Support keeping collecting the slowly segments in the sampling mechanism.
* Support choose files to active the meter analyzer.
* Improve Kubernetes service registry for ALS analysis.
* Improve the queryable tags generation. Remove the duplicated tags to reduce the storage payload.

#### UI

#### Document

All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/62?closed=1)

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Find change logs of all versions [here](changes).