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+# Release Notes
+        Release Notes - Apache ServiceComb - Version service-center-2.2.0
+
+## Bug
+- [SCB-2816](https://issues.apache.org/jira/browse/SCB-2816) - no log print when panic
+- [SCB-2817](https://issues.apache.org/jira/browse/SCB-2817) - syncer init failed
+- [SCB-2818](https://issues.apache.org/jira/browse/SCB-2818) - frontend SSRF
+- [SCB-2820](https://issues.apache.org/jira/browse/SCB-2820) - return 'no permission' when discover provider in specify env
+- [SCB-2826](https://issues.apache.org/jira/browse/SCB-2826) - syncer log print typo
+- [SCB-2827](https://issues.apache.org/jira/browse/SCB-2827) - gov list return wrong kind
+- [SCB-2828](https://issues.apache.org/jira/browse/SCB-2828) - failed to create match-group policy
+- [SCB-2829](https://issues.apache.org/jira/browse/SCB-2829) - sync config without history
+- [SCB-2830](https://issues.apache.org/jira/browse/SCB-2830) - failed to create match-group policy
+- [SCB-2835](https://issues.apache.org/jira/browse/SCB-2835) - allow blank account/role name
+- [SCB-2837](https://issues.apache.org/jira/browse/SCB-2837) - fix syncer document reading problem
+## New Feature
+- [SCB-2821](https://issues.apache.org/jira/browse/SCB-2821) - servicecomb turbo 
+- [SCB-2825](https://issues.apache.org/jira/browse/SCB-2825) - add batch create accounts API
+- [SCB-2831](https://issues.apache.org/jira/browse/SCB-2831) - add properties filter in ListServiceDetail API 
+- [SCB-2834](https://issues.apache.org/jira/browse/SCB-2834) - implement syncer config resource interface
+- [SCB-2617](https://issues.apache.org/jira/browse/SCB-2617) Service center and istio integration
+- [SCB-2836](https://issues.apache.org/jira/browse/SCB-2836) - add instanceIsolation kind
+
+## Improvement
+- [SCB-2819](https://issues.apache.org/jira/browse/SCB-2819) - bad performance in login API
+- [SCB-2822](https://issues.apache.org/jira/browse/SCB-2822) - allow batch create account without password
+- [SCB-2823](https://issues.apache.org/jira/browse/SCB-2823) - allow creating account with ID
+- [SCB-2824](https://issues.apache.org/jira/browse/SCB-2824) - always authenticate the request with HTTP Header 'Authorization'
+- [SCB-2831](https://issues.apache.org/jira/browse/SCB-2831) - optimize codec to gain up to 50% better performance
+- [SCB-2833](https://issues.apache.org/jira/browse/SCB-2833) - refactor policy validator