using regexp in JSPs on Tomcat

[Albert Wang <Al...@bms.com>]

Hi all,

I have a Java class which uses the Jakarta regexp package for some 
string parsing.  It works perfectly fine on its own.  I'm developing a 
set of JSPs, one of which instantiates this class and calls some 
methods.  However, Tomcat is throwing me the following exception:

javax.servlet.ServletException: org/apache/regexp/RESyntaxException
    at 
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:471)
    at org.apache.jsp.viewSample$jsp._jspService(viewSample$jsp.java:367)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at 
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
    at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
    at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
    at 
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
    at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
    at 
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
    at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
    at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
    at 
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
    at 
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
    at 
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
    at java.lang.Thread.run(Thread.java:484)

As you can see, it's a regexp exception, but it's not my class that's 
throwing it, it's Jasper.  When I do not instantiate this class of mine, 
the JSP displays perfectly.  Is there some documented incompatibility 
with using regexp within JSPs on Tomcat?  The only workaround I can 
think of is to use some other regular expression package that isn't used 
inherently within Tomcat.  Any suggestions?

Thanks for any help,
-Al

-- 
------------------------------------------------------
Albert Wang
DDED Informatics
Bristol-Myers Squibb Pharmaceutical Research Institute



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