[show] java.text.ParseException: Unparseable date: "2021-08-17"

javax.servlet.ServletException: javax.servlet.jsp.JspException: java.text.ParseException:
Unparseable date: "2021-08-17"
	at com.caucho.jsp.PageContextImpl.handlePageException(PageContextImpl.java:1211)
	at _jsp._WEB_22dINF._jsp._template._seo._dianping._commentTag._serialGroupCondition__jsp._jspService(_serialGroupCondition__jsp.java:433)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at cn.pcauto.seo.auth.AuthFilter.doFilter(AuthFilter.java:57)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.gelivable.web.EnvFilter.doFilter(EnvFilter.java:83)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)
Caused by: javax.servlet.jsp.JspException: java.text.ParseException: Unparseable
date: "2021-08-17"
	at com.caucho.jstl.rt.FmtParseDateTag.doEndTag(FmtParseDateTag.java:203)
	at _jsp._WEB_22dINF._jsp._template._seo._dianping._commentTag._serialGroupCondition__jsp._jspService(WEB-INF/jsp/template/seo/dianping/commentTag/serialGroupCondition.jsp:231)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at cn.pcauto.seo.auth.AuthFilter.doFilter(AuthFilter.java:57)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.gelivable.web.EnvFilter.doFilter(EnvFilter.java:83)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.text.ParseException: Unparseable date: "2021-08-17"
	at java.text.DateFormat.parse(DateFormat.java:337)
	at com.caucho.jstl.rt.FmtParseDateTag.doEndTag(FmtParseDateTag.java:189)
	at _jsp._WEB_22dINF._jsp._template._seo._dianping._commentTag._serialGroupCondition__jsp._jspService(WEB-INF/jsp/template/seo/dianping/commentTag/serialGroupCondition.jsp:231)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:293)
	at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:111)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:816)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at cn.pcauto.seo.auth.AuthFilter.doFilter(AuthFilter.java:57)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.gelivable.web.EnvFilter.doFilter(EnvFilter.java:83)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)