Hello,
My issue can be related to Servlets, but it also can be related to Tomcat.
I'm using tomcat 7.0.27.
In my servlet's post method I have the following:
protected void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
if
(this.hasCredential((String)request.getSession().getAttribute("auth_cookie")))
{
String mac = request.getParameter("subscriber_mac");
Processing.logoutSubscriberByMac(mac); //this is important
request.getSession().setAttribute("subscriber_id",
request.getParameter("subscriber_id"));
response.sendRedirect("/page/to/redirect");
myLogger.info("subscriber with mac " + mac + " logged out by
administrator " + request.getSession().getAttribute("username") + " from
host " + request.getRemoteAddr()); //take care of this also
} else {
//treat this case ...
}
}
TheProcessing.logoutSubscriberByMac(mac) has that code on it:
public static void logoutSubscriberByMac(String mac) {
try {
Process proc = Runtime.getRuntime().exec("logout subscriber
command");
proc.waitFor(); //here is the problem
} catch (IOException e) {
//treat this error
} catch (InterruptedException e) {
//treat this error
}
}
The problem is that if things are like how are presented above, the servlet
does not redirect the page:response.sendRedirect("/page/to/redirect");.
Even if the logs are written: mylogger.info("subscriber with mac ..."), the
browser tries to redirect, but it gets stuck on redirection and after
loading timeout, the browser's failure page appears. If I comment the line
that contains command to wait, proc.waitFor();, everything works well.
Even more, I tried to get the exit value from Process and it returns 0.
Question: Do you have any idea where the problem comes from? Can you give
me some suggestions?
Note: I redirect all traffic that comes to Apache HTTP server to Tomcat
through AJP Connector. But I think that shouldn't represent an issue for
that scenario taking in account that all other redirects are working great.
