Corrupt form data: premature ending

I am trying to upload files using the FileReference class. Files >2MB all work correctly but files <2MB cause this error:

"java.io.IOException: Corrupt form data: premature ending"

On the server I am using the com.oreilly.servlet package to handle the request.

I have used this package many times to successfully handle file uploads from flex, but for some reason, now I am having this problem.

Here is the stack trace for some more info:

java.io.IOException: Corrupt form data: premature ending
    at com.oreilly.servlet.multipart.MultipartParser.<init>(MultipartParser.java:205)
    at com.oreilly.servlet.MultipartRequest.<init>(MultipartRequest.java:222)
    at com.oreilly.servlet.MultipartRequest.<init>(MultipartRequest.java:173)
    at com.mydomain.FileUploadServlet.doPost(FileUploadServlet.java:46)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:414)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)

Solution

It seems that there is a bug that exists when using com.orielly.servlet.MultipartRequest class and the org.apache.struts2.dispatcher.ActionContextCleanUp filter together. This is what was causing small file uploads to fail.