UPDATE RELEASE-NOTES.md for 2.4.2
+## 2.4.2
+
+### New Features
+
+1. Add Mqtt plugin
+2. Add Shenyu-Agent module support observability
+3. Add opentelemetry plugin on Shenyu-Agent module
+4. Add jaeger plugin on Shenyu-Agent module
+5. Add zipkin plugin on Shenyu-Agent module
+6. Support Shenyu instance register by zookeeper
+7. Support Shenyu response data custom format
+8. Support https for upstream check
+9. Add RpcContextPlugin to transmit header to rpc context
+10. Support cluster model for dubbo plugin
+11. Support Shenyu instance register by ETCD
+
+### API Changes
+
+1.Add configuration properties for HTTP synchronization data
+2.Remove'/shenyu-client/**','/configs/**','/plugin'interface from the whitelist interface of Shenyu admin
+
+### Enhancement
+
+1. Optimize global error handler for flexible processing
+2. Optimized the database access in the loop
+3. Optimize result media type and reset response header
+4. Enhancement crossfilter filter the same headers
+5. Optimize shenyu context module data
+6. Optimize dubbo plugin
+7. Optimize admin db operation
+8. Refactor Response and Cryptor plugin
+9. Optimize Admin Resource Permission loader
+10. Add authentication on shenyu admin when register by http
+11. Optimize netty config.
+12. Optimize SQL files for resource,permission
+13. Add ExcludeOperatorJudge for selector and rule
+14. Add docker-compose on Shenyu-dist
+15. Enhance the ability of jwt plugin
+
+### Refactor
+
+1. Remove SpEL and Groovy plugins
+2. Optimization prompt of ExtensionLoader
+3. Add http client strategy property
+4. Refactor shenyu client
+
+### Bug Fix
+
+1. Fix sentinel Plugin-exception number is not effective
+2. Fix HttpClientProperties.javaresponseTimeout can not config in yaml
+3. Fix Connection reset by peer Exception on webclient
+4. Fix register metadata and uri order
+5. Fix Admin when press the Add button
+6. Fix Spi config
+7. Support Dubbo Plugin Single Parameter Primitive Type
+8. Fix using etcd cluster to sync data init failed
+9. Fix Shiro get white list is null bug
+10. Fix zookeeper sync error handling event bug
+11. Fix modify-response-plugin and cryptor-response-plugin are used in combination, and no information is returned
+12. Fix the bug of missing some field in cryptor rule handler using h2
+
+
## 2.4.1
### New Features
* Add register center for etcd #1161
* Add register center for nacos #1182
* Add register center for zookeeper #1141 #1139
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