我有一个简单的java应用程序，它的控制器只返回一个hello world jsp。它在非k8s环境中部署时工作正常，但是在k8s上部署时，第一次请求页面时需要大约15秒才能响应。第一次请求后，性能在一瞬间就恢复到正常响应。我启用了spring的调试日志，但没有什么用处。只有15秒没有记录：

2021-08-04 16:38:16,856 DEBUG org.springframework.web.servlet.view.InternalResourceView: Forwarding to [/WEB-INF/jsp/test.jsp]
...
2021-08-04 16:38:31,452 DEBUG org.springframework.security.web.header.writers.HstsHeaderWriter: Not injecting HSTS header since it did not match the requestMatcher org.springframework.security.web.header.writers.HstsHeaderWriter$SecureRequestMatcher@5073a20b
2021-08-04 16:38:31,453 DEBUG org.springframework.security.web.context.HttpSessionSecurityContextRepository$SaveToSessionResponseWrapper: SecurityContext is empty or contents are anonymous - context will not be stored in HttpSession.
2021-08-04 16:38:31,455 DEBUG org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor: Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
2021-08-04 16:38:31,459 DEBUG org.springframework.web.servlet.FrameworkServlet: Completed 200 OK
2021-08-04 16:38:31,459 DEBUG org.springframework.security.web.access.ExceptionTranslationFilter: Chain processed normally
2021-08-04 16:38:31,460 DEBUG org.springframework.security.web.context.SecurityContextPersistenceFilter: SecurityContextHolder now cleared, as request processing completed

我想知道是否有人对可能发生的事情有什么建议，或者我如何进一步调查？