JVM crash if Request size is more than 4MB ?

I have a strange problem. I have a File Upload servlet, whenever I try to
upload a file larger than 4MB, the JVM simply crashes.

Apache Server Service is still available but I can see that one of the
2 java.exe processes has died and I get 'INTERNAL SERVER ERROR' page.

What I can think of a workaround is not to parse the request if its larger than 4MB, but I just dont like doing that.

I wanna know if there is *ANY* restriction that kills the process ? IF so, what should I do to make my code handle larger requests...?

If I upgrade to a newer JDK will that help ?

I would appreciate any help from you guys...

Thanks.

-Ved

Browser : IE 5.0.x, IE 5.5.x, IE 6.0.x
JDK versions
-------------
Java Runtime Environment 1.3.1_01 (Sun Microsystems Inc.)
Java Virtual Machine specification Java Virtual Machine Specification - 1.0
(Sun Microsystems Inc.)
Java Virtual Machine implementation Java HotSpot(TM) Client VM - 1.3.1_01
(Sun Microsystems Inc.)
Java Runtime Environment specification Java Platform API Specification - 1.3
(Sun Microsystems Inc.)

could u please copy and paste the error stack trace here

Ved,
You haven't told us what upload library (or container for that matter) that you're using.
I'm sure you'll get a lot more help if you take some time to let us know the details.

Hi,

There is nothing special about the container, its an ordinary servlet which first parses the request data. If the request is fine, I read the line into a buffer and finally create a blob out of it before committing to the db.

When the request size is large (mostly > 4MB), the JVM dies. The stack is too huge but the crux is : Error : java.io.IOException: Stream closed prematurely

This happens mostly when I try with files more than 4MB.

I appreciate your help...

Thanks

Most of us don't write upload handlers ourselves and therefore probably haven't run into this issue.

I use Commons Fileupload from Apache.
http://jakarta.apache.org/commons/fileupload

There are several others out there that get mentioned in this and the JSP forum. This one is open source so you might see a workaround to your issue if you inspect the source.

Yes Ben, I agree that its impractical to write upload handlers ourselves but
there are people like me...but I will surely check the code from
Commons Fileupload from Apache.

Thanks a lot.

-Ved

You might also want to post some more of your setup.
What conatiner are you using?
Are you using it as a standalone?
If not, what webserver and what connector are you using?

I know there was an issue in one of the Tomcat/ISS connectors with large multipart requests at one point.

Maybe you can increase xmx settings? I use own upload code and write result in blob. I have no problems to upload files bigger than 4GB. Actually I met some problem, when content length limited to 4GB because uses int, so I parsed this header in long.