https://issues.apache.org/bugzilla/show_bug.cgi?id=46075
Summary: FileUpload memory usage
Product: Tomcat 6
Version: 6.0.18
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Servlet & JSP API
AssignedTo: dev@tomcat.apache.org
ReportedBy: [EMAIL PROTECTED]
The DefaultFileItem class in pacakge org.apache.tomcat.util.http.fileupload
creates a ByteArrayOutputStream of the full threshold size for every control on
the submitted form. I have a form with 63 controls (checkboxes, text boxes and
one File input), and I set the threshold to 20 Meg to allow upload of large
image files into memory. I get an OutOfMemory exception since it tries to
allocate 63 lots of 20M, although only 1 control requires the requested size.
I think it would be much more sensible to create the ByteArrayOutputStream with
an initial size of only a few kilobytes size it automatically increases its
size as data is written to it.
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