Re: socket write error

[Felix G. <fel...@ne...>]

Hello Mike,

according to your stacktrace the exception is thrown by the Tomcat 
DefaultServlet which is responsible for delivering static content like 
images, stylesheets etc. Probably your page contains references to such 
resources which would explain why the exception is thrown when you 
reload your page.
A socket write error usually occurs, when a client (the browser) closes 
the socket before all data has been sent by the server. Googeling for 
DefaultServlet and copyRange or SocketException brings up quite a lot of 
similar stacktraces. Since the problem is not caused by actioncache I'd 
recommend to upgrade to the latest Tomcat version or to use another 
Connector implementation.

To trace which resource exactly causes the exception you could map a 
Servlet-Filter to /* with the following doFilter() method body:

try {
    filterChain.doFilter(request, response);
}
catch (Exception e) {
    String url = ((HttpServletRequest) request).getRequestURL().toString();
    System.out.println("An error occured while processing " + url);
    e.printStackTrace();
}

Hope this helps,
Felix