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當我混合使用JSTL 1.0和JSTL 1.1 taglib聲明時，它會在我的一些服務器上導致ParseException，但不是所有服務器都會導致ParseException。當我混合使用JSTL 1.0和JSTL 1.1 taglib聲明時，它會在我的一些服務器上導致ParseException，但不是全部。爲什麼？
這裏是一個真實給我的麻煩代碼塊：
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<c:set var="TEXTVARIABLE">|STRINGOFTEXT|</c:set>
<c:set var="OTHERTEXTVARIABLE">${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}</c:set>
，這裏是例外：
javax.servlet.jsp.JspException：com.caucho.jsp.JspLineParseException： /WEB-INF/jsp/online/system/modules/com.MYCOMPANY.marketing/templates/common/MY_JSP_PAGE.jsp:1：tag ='out'/ attribute ='value'：解析自定義操作屬性「值「值爲」$ {fn：contains（TEXTVARIABLE，'| STRINGOFTEXT |'）}「：org.apache.taglibs.standard.lang.jstl.parser.ParseException：EL函數不是支持的。
不過，如果我更改URI爲核心聲明http://java.sun.com/jsp/jstl/core
因此，這裏的真正怪異的一部分，一切工作正常：由於某種原因，混合1.0和1.1的taglib聲明不僅會導致兩個的例外我的服務器，我的登臺服務器和我的生產服務器。它在我的本地機器或我的開發服務器上完全沒有問題。爲什麼是這樣？什麼可能會導致這種行爲差異？這三臺服務器在安裝和配置上非常相似。
JSP頁面由OpenCMS提供，我正在使用Caucho的Resin Web服務器。我知道你不知道我的服務器或CMS是如何建立的，但真的，我正在尋找的是想法。任何想法都會有所幫助，這個問題一直在令我絕望。即使你不知道什麼可能導致問題，如果你有任何建議，我怎麼可能方法的問題，這將是非常有益的。我只是不明白什麼可能會導致我的服務器之間的行爲差異。
僅供參考，以下是完整的堆棧跟蹤：
javax.servlet.jsp.JspException: com.caucho.jsp.JspLineParseException: /WEB-INF/jsp/online/system/modules/com.MYCOMPANY.marketing/templates/common/MY_JSP_PAGE.jsp:1: tag = 'out'/attribute = 'value': An error occurred while parsing custom action attribute "value" with value "${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}": org.apache.taglibs.standard.lang.jstl.parser.ParseException: EL functions are not supported.
at org.opencms.jsp.CmsJspTagInclude.includeActionWithCache(CmsJspTagInclude.java:369)
at org.opencms.jsp.CmsJspTagInclude.includeTagAction(CmsJspTagInclude.java:241)
at org.opencms.jsp.CmsJspTagInclude.doEndTag(CmsJspTagInclude.java:472)
at _jsp._WEB_22dINF._jsp._online._system._modules._com__MYCOMPANY__marketing._templates._MAIN_0PAGE__jsp._jspService(_MAIN_0PAGE__jsp.java:153)
at com.caucho.jsp.JavaPage.service(JavaPage.java:60)
at com.caucho.jsp.Page.pageservice(Page.java:579)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:179)
at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:175)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:485)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:350)
at org.opencms.flex.CmsFlexRequestDispatcher.includeExternal(CmsFlexRequestDispatcher.java:194)
at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:169)
at org.opencms.loader.CmsJspLoader.service(CmsJspLoader.java:1193)
at org.opencms.flex.CmsFlexRequestDispatcher.includeInternalWithCache(CmsFlexRequestDispatcher.java:423)
at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:173)
at org.opencms.loader.CmsJspLoader.dispatchJsp(CmsJspLoader.java:1227)
at org.opencms.loader.CmsJspLoader.load(CmsJspLoader.java:1171)
at org.opencms.loader.A_CmsXmlDocumentLoader.load(A_CmsXmlDocumentLoader.java:232)
at org.opencms.loader.CmsXmlContentLoader.load(CmsXmlContentLoader.java:52)
at org.opencms.loader.CmsResourceManager.loadResource(CmsResourceManager.java:964)
at org.opencms.main.OpenCmsCore.showResource(OpenCmsCore.java:1498)
at org.opencms.main.OpenCmsServlet.doGet(OpenCmsServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:115)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:92)
at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106)
at com.caucho.filters.CmsGzipFilter.doFilter(CmsGzipFilter.java:177)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:277)
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:106)
at com.caucho.server.dispatch.ForwardFilterChain.doFilter(ForwardFilterChain.java:80)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:207)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:173)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:274)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:514)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:520)
at com.caucho.util.ThreadPool.run(ThreadPool.java:442)
at java.lang.Thread.run(Thread.java:595)
Caused by: com.caucho.jsp.JspLineParseException: /WEB-INF/jsp/online/system/modules/com.MYCOMPANY.marketing/templates/common/MY_JSP_PAGE.jsp:1: tag = 'out'/attribute = 'value': An error occurred while parsing custom action attribute "value" with value "${fn:contains(TEXTVARIABLE, '|STRINGOFTEXT|')}": org.apache.taglibs.standard.lang.jstl.parser.ParseException: EL functions are not supported.
at com.caucho.jsp.java.JspNode.error(JspNode.java:1489)
at com.caucho.jsp.java.JspNode.error(JspNode.java:1480)
at com.caucho.jsp.java.JavaJspGenerator.validate(JavaJspGenerator.java:466)
at com.caucho.jsp.JspCompilerInstance.generate(JspCompilerInstance.java:475)
at com.caucho.jsp.JspCompilerInstance.compile(JspCompilerInstance.java:373)
at com.caucho.jsp.JspManager.compile(JspManager.java:233)
at com.caucho.jsp.JspManager.createPage(JspManager.java:177)
at com.caucho.jsp.JspManager.createPage(JspManager.java:157)
at com.caucho.jsp.PageManager.getPage(PageManager.java:248)
at com.caucho.jsp.PageManager.getPage(PageManager.java:166)
at com.caucho.jsp.QServlet.getSubPage(QServlet.java:292)
at com.caucho.jsp.QServlet.getPage(QServlet.java:210)
at com.caucho.server.dispatch.PageFilterChain.compilePage(PageFilterChain.java:206)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:133)
at shared.filter.RemoteAddrFilterBase.doFilter(RemoteAddrFilterBase.java:57)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:115)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:175)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:485)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:350)
at org.opencms.flex.CmsFlexRequestDispatcher.includeExternal(CmsFlexRequestDispatcher.java:194)
at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:169)
at org.opencms.loader.CmsJspLoader.service(CmsJspLoader.java:1193)
at org.opencms.flex.CmsFlexRequestDispatcher.includeInternalWithCache(CmsFlexRequestDispatcher.java:423)
at org.opencms.flex.CmsFlexRequestDispatcher.include(CmsFlexRequestDispatcher.java:173)
at org.opencms.jsp.CmsJspTagInclude.includeActionWithCache(CmsJspTagInclude.java:364)
... 45 more