tomcat 与 resin 兼容问题

500 Servlet Exception
java.lang.NullPointerException
at com.caucho.jsp.JspWriterAdapter.write(JspWriterAdapter.java:137)
at com.caucho.jsp.AbstractBodyContent.println(AbstractBodyContent.java:348)
at _jsp._login__jsp._jspService(/login.jsp:62)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.pageservice(Page.java:571)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:155)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:190)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:177)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221)
at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:392)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:331)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:464)
at com.caucho.util.ThreadPool.run(ThreadPool.java:408)
at java.lang.Thread.run(Thread.java:534)
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Resin-3.0.8 (built Tue, 08 Jun 2004 02:25:40 PDT)