-none- 2007-08-16 - By Christopher Schultz
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DAvid,
David Hesson wrote:
> The
> content-length has a maximum value of 2.x billion, which is right under
> two gigabytes.
Is this a limit on commons-upload? The header itself can contain an
arbitrarily high number, so there's no inherent file-size limit on
uploads over HTTP.
> A 2.xGB file will result in a negative content length
> from integer overflow into the final, negative bit position.
I don't think so. Java doesn't overflow like C does. Attempting to read
an int that's too big results in an exception, not a negative result:
$ cat > IntReadTest.java
public class IntReadTest
{
public static void main(String[] args)
{
System.out.println(Integer.parseInt(args[0]));
}
}
^D
$ javac IntReadTest
$ java IntReadTest 2147483647
2147483647
$ java IntReadTest 2147483648
Exception in thread "main" java.lang.NumberFormatException: For input
string: "2147483648"
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:463)
at java.lang.Integer.parseInt(Integer.java:497)
at IntReadTest.main(IntReadTest.java:5)
$
Now, if you were using an old version of mod_jk (which you didn't
mention), it's possible that the Content-Length header is being
corrupted. Since you have a filter chain, can you print the (String)
value of the Content-Length header before processing begins? That would
be helpful.
- -chris
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