Premature ending error while uploading file using multipartrequest

Hi,

I am using oreilly's multipartrequest for uploading.

It is giving me following error. Does anybody have idea why it is coming and how it can be solved?

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:109)

at com.oreilly.servlet.MultipartRequest.<init>(MultipartRequest.java:89)

at com.fujitsu.baycare.controller.contest.ContestController.processRequest(ContestController.java:52)

at com.fujitsu.baycare.servlet.BayCareOnlineServlet.service(BayCareOnlineServlet.java:219)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)

at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)

at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)

at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)

at java.lang.Thread.run(Thread.java:595)

java.lang.NullPointerException

at com.fujitsu.baycare.controller.contest.ContestController.processRequest(ContestController.java:56)