�资源垃圾回收问题。（<a href=https://github.com/istio/istio/issues/16818>Issue #16818</a>）</li><li><strong>修复</strong> 在失败时不更新 webhook 的问题。（<a href=https://github.com/istio/istio/pull/17820>Pull Request #17820</a>）</li><li><strong>Improved</strong> OpenCensus 跟踪适配器的性能问题。(<a href=https://github.com/istio/istio/issues/18042>Issue #18042</a>）</li></ul><h2 id=minor-enhancements>小的增强</h2><ul><li><strong>增强</strong> SDS 服务的可靠�