forward and sendRedirect issue. "Cannot call sendRedirect() after the response has been committed"

Question

i want to implement this..
In my page1.jsp i have a link and the link triggers a servlet

    <a href="Servlet">link1</a>

So, when the user press the link1, the servlet among other things i want to do two things.
1 Pass to the next page page2.jsp an object and
2 redirect the user to the page2.jsp

In the Servlet i wrote:

     request.setAttribute("cis", myObjet);
     RequestDispatcher disp = getServletContext().getRequestDispatcher("/page2.jsp");
     disp.forward(request, response);
     response.sendRedirect("page2.jsp");

After i run the application, i get an error in console that says:

Cannot call sendRedirect() after the response has been committed

i read some topics relevant to this, but i havent solve it. Also the application continue to work, although i have this error in the console... thank you a lot!

Why have you added the `sendRedirect`, given that you are already forwarding to the same page? — Rohit Jain, Aug 06 '13 at 11:47
well you have right!! it worked.. Submit it as an answer if you want, to accept it.. thx @RohitJain — yaylitzis, Aug 06 '13 at 11:56

score 5 · Answer 1 · answered Feb 17 '15 at 10:05

if you have to more than one redirect lines which checks conditions each own, to not get exception you should control the response is committed.

HttpServletResponse response = (HttpServletResponse) getResponse();

if (!response.isCommitted()){
// redirect or dispatch whereever you want
}

score 2 · Accepted Answer · edited May 23 '17 at 12:16

2

First of all, you can't call sendRedirect(), after you have already used forward(). So, you get that exception.

However, it seems like the use of sendRedirect() there is really not needed. You seem to be believing that you need to use sendRedirect() after forward(), since you have used the same page in both of them. Actually, it's not like that.

Simply remove the sendRedirect line, and you'll be fine.

See also:

java.lang.IllegalStateException: Cannot (forward | sendRedirect | create session) after response has been committed

edited May 23 '17 at 12:16

Community

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answered Aug 06 '13 at 11:59

Rohit Jain

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in my case checking for null pointer exception and fixing it by avoiding that scenario altogether fixed it. – Smart Coder Jul 07 '20 at 21:49

score 1 · Answer 3 · answered Aug 06 '13 at 11:40

What you are trying to do is fundamentally wrong. You can't do a redirect after a forward or vice versa. You can do either forward or redirect.

Read up these links:

http://docs.oracle.com/javaee/6/api/javax/servlet/RequestDispatcher.html#forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse)

http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#sendRedirect(java.lang.String)

http://javapapers.com/jsp/difference-between-forward-and-sendredirect/

Hope this helps.

Sahil

score 0 · Answer 4 · answered Aug 06 '13 at 12:22

0

You can work with the combination of rd.include(req,res); and res.sendRedirect(-); at the same time but you can't with the combination of rd.forward(req,res); and res.sendRedirect(-); at the same time. Because both the forwards to the new page.

answered Aug 06 '13 at 12:22

Manohar Ch

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forward and sendRedirect issue. "Cannot call sendRedirect() after the response has been committed"

4 Answers4