| 8.1.0 |
| ------------------ |
| #### Project |
| * Support Kafka as an optional trace, JVM metrics, profiling snapshots and meter system data transport layer. |
| * Support Meter system, including the native metrics APIs and the Spring Sleuth adoption. |
| * Support JVM thread metrics. |
| |
| #### Java Agent |
| * [**Core**] Fix the concurrency access bug in the Concurrency ClassLoader Case. |
| * [**Core**] Separate the config of the plugins from the core level. |
| * [**Core**] Support instrumented class cached in memory or file, to be compatible with other agents, such as Arthas. |
| * Add logic endpoint concept. Could analysis any span or tags flagged by the logic endpoint. |
| * Add Spring annotation component name for UI visualization only. |
| * Add support to trace `Call procedures` in MySQL plugin. |
| * Support GraphQL plugin. |
| * Support Quasar fiber plugin. |
| * Support InfluxDB java client plugin. |
| * Support brpc java plugin |
| * Support `ConsoleAppender` in the logback v1 plugin. |
| * Enhance vert.x endpoint names. |
| * Optimize the code to prevent mongo statements from being too long. |
| * Fix WebFlux plugin concurrency access bug. |
| * Fix ShardingSphere plugins internal conflicts. |
| * Fix duplicated Spring MVC endpoint. |
| * Fix lettuce plugin sometimes trace doesn‘t show span layer. |
| * Fix `@Tag` returnedObject bug. |
| |
| #### OAP-Backend |
| * Support Jetty Server advanced configurations. |
| * Support label based filter in the prometheus fetcher and OpenCensus receiver. |
| * Support using k8s configmap as the configuration center. |
| * Support OAP health check, and storage module health check. |
| * Support sampling rate in the dynamic configuration. |
| * Add `endpoint_relation_sla` and `endpoint_relation_percentile` for endpoint relationship metrics. |
| * Add components for Python plugins, including Kafka, Tornado, Redis, Django, PyMysql. |
| * Add components for Golang SDK. |
| * Add Nacos 1.3.1 back as an optional cluster coordinator and dynamic configuration center. |
| * Enhance the metrics query for ElasticSearch implementation to increase the stability. |
| * Reduce the length of storage entity names in the self-observability for MySQL and TiDB storage. |
| * Fix labels are missing in Prometheus analysis context. |
| * Fix column length issue in MySQL/TiDB storage. |
| * Fix no data in 2nd level aggregation in self-observability. |
| * Fix searchService bug in ES implementation. |
| * Fix wrong validation of endpoint relation entity query. |
| * Fix the bug caused by the OAL debug flag. |
| * Fix endpoint dependency bug in MQ and uninstrumented proxy cases. |
| * Fix time bucket conversion issue in the InfluxDB storage implementation. |
| * Update k8s client to 8.0.0 |
| |
| #### UI |
| * Support endpoint dependency graph. |
| * Support x-scroll of trace/profile page |
| * Fix database selector issue. |
| * Add the bar chart in the UI templates. |
| |
| #### Document |
| * Update the user logo wall. |
| * Add backend configuration vocabulary document. |
| * Add agent installation doc for Tomcat9 on Windows. |
| * Add istioctl ALS commands for the document. |
| * Fix TTL documentation. |
| * Add FAQ doc about thread instrumentation. |
| |
| #### CVE |
| * Fix fuzzy query sql injection in the MySQL/TiDB storage. |
| |
| All issues and pull requests are [here](https://github.com/apache/skywalking/milestone/52?closed=1) |
| |
