IllegalStateException is coming if I use sendRedirect() method..

[Shashi Kala]

Hi Ranchers,

I am having a HTML page, which is devided as frames. There is 3 frames in this page named as first,left and content. In content frame I have a login page. Here when user clicks on login button, In content frame, some other jsp page should gets displayed(say the jsp page is welcome.jsp).

For this, Previously I have used

 response.sendRedirect("/abc/welcome.jsp");  

But the problem here is..If I login once..it is coming properly. If I click on some other button in another frame and logout..Now in case if I login again an error is coming like..

HTTP Status 500

description The server encountered an internal error() that prevented it from fulfilling this request.

exception

java.lang.IllegalStateException: Cannot forward after response has been committed.
...
...

As shown above the error is coming..So what I did means instead of using sendRedirect() method, I simply assigned the frame location to "/abc/welcome.jsp". Now it is working fine..But I just want to know what was the problem with sendRedirect() method. In which case, the above error will come?

Can anybody make me known..??

Thanks in Advance,
Shashi.

[Seetharaman Venkatasamy]

if you want to use sendRedirect on response. response should not commit already

[Shashi Kala]

response should not commit already

means.. Can you explain in detailed..?

[Amit Ghorpade]

java.lang.IllegalStateException: Cannot forward after response has been committed.

The exception itself gives the reason.
And response has been committed means that you have already written the response to the client , so now you dont have control over it.
Please see this FAQ entry for more information.


Hope this helps

[Shashi Kala]

Thanks All..

I understood what is happening.

[Nishant Kr]

Hi Shashi,

It'll be better if you use

<jsp:forward page ="("/abc/welcome.jsp"/>

in place of

response.sendRedirect("/abc/welcome.jsp");

after checking all the necessary conditions for the login stuff.
This tag doesn't notify the browser about the new page. The new page is opened but you need to notice that the address in the address bar remains the same.

Thank You,
Nishant

[Nishant Kr]

<jsp:forward page ="/abc/welcome.jsp"/>

[Amit Ghorpade]

Hi Nishant Kr welcome to Javaranch ,
If you want to edit a post(posted by you of course), then you can do it by simply clicking the icon.

Hope this helps
[ August 07, 2008: Message edited by: Amit Ghorpade ]

[Nishant Kr]

Mr Ghorpade,

Can you please answer to the topic...? If you don't have that much of ability or kind nature to help somebody, you better be in peace. I find most of your forums to be useless....!

Thank you

[Amit Ghorpade]

Originally posted by Nishant Kr
Can you please answer to the topic...?

Its already posted above by me.

If you don't have that much of ability or kind nature to help somebody, you better be in peace.

Do you have any good reason to say that? If yes please let me know.
But anyways I dont think you are supposed to tell what I should do.

I find most of your forums to be useless....!

I dont have any forum

[Bear Bibeault]

"Nishant Kr", you have previously been warned on one or more occasions regarding adjusting your display name to meet JavaRanch standards. This is not optional. Please take a look at the JavaRanch Naming Policy and adjust your display name to match it prior to your next post.

Your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.

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bear
JavaRanch Sheriff