Hi all,
I am seeing a ConcurrentModificationException in the jasper compiler every now
and then (v 6.0.18). Can not reproduce it on the spot (as it is probably a
concurrency issue), but it always seems to occur when dispatching from my
servlet to a jsp file.
Code:
RequestDispatcher requestDispatcher =
request.getRequestDispatcher(include);
requestDispatcher.include(request, response);
Error:
SEVERE: Servlet.service() for servlet jsp threw exception
java.util.ConcurrentModificationException
at
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at
org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:305)
at
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:112)
at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
at
org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)
at
nl.gx.webmanager.servlet.ServerParsedHTMLController.doService(ServerParsedHTMLController.java:192)
While google-ing and looking at tomcat svn I did not find anything that
resembles this. However I did find an issue over at Glassfish and they seem to
have resolved it by moving the JspConfig init() method to the constructor.
https://glassfish.dev.java.net/issues/show_bug.cgi?id=6409
Again looking at tomcat code in svn it looks like such meassures have not been
taken over there, but offcourse I can be mistaking :) Is there something I am
doing wrong or can do different to avoid this problem? Any tips would be much
appriciated!
Best Regards,
Bram
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