iText Acro Form SocketException

[Jelle Victoor]

I'm generating an pdf from a servlet. So when you go to the url, i generate the pdf.
When I close my pdfstamper, i get this stacktrace:

ClientAbortException:  java.net.SocketException: Connection reset by peer: socket write error
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:358)
	at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
	at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:349)
	at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:381)
	at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:370)
	at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
	at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
	at java.io.FilterOutputStream.write(FilterOutputStream.java:80)
	at com.lowagie.text.pdf.OutputStreamCounter.write(OutputStreamCounter.java:107)
	at com.lowagie.text.pdf.PRStream.toPdf(PRStream.java:191)
	at com.lowagie.text.pdf.PdfIndirectObject.writeTo(PdfIndirectObject.java:167)
	at com.lowagie.text.pdf.PdfWriter$PdfBody.add(PdfWriter.java:391)
	at com.lowagie.text.pdf.PdfWriter.addToBody(PdfWriter.java:828)
	at com.lowagie.text.pdf.PdfStamperImp.close(PdfStamperImp.java:229)
	at com.lowagie.text.pdf.PdfStamper.close(PdfStamper.java:177)
	at be.ugent.dbz.alumni.midtier.service.impl.MembershipLetterServiceImpl.writeMembershipLetterOnStream(MembershipLetterServiceImpl.java:190)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy73.writeMembershipLetterOnStream(Unknown Source)
	at be.ugent.dbz.alumni.web.servlet.MembershipLetterDownloadServlet.fillContent(MembershipLetterDownloadServlet.java:93)
	at be.ugent.dbz.alumni.web.servlet.AbstractDownloadServlet.doGet(AbstractDownloadServlet.java:51)
	at be.ugent.dbz.alumni.web.servlet.MembershipLetterDownloadServlet.doGet(MembershipLetterDownloadServlet.java:43)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
	at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
	at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
	at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:740)
	at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
	at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:349)
	at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:764)
	at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:126)
	at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:573)
	at org.apache.coyote.Response.doWrite(Response.java:560)
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353)
	... 68 more
11:37:52,046 FATAL [AbstractDownloadServlet] 
ClientAbortException:  java.net.SocketException: Connection reset by peer: socket write error
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:358)
	at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
	at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:309)
	at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:288)
	at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:98)
	at be.ugent.dbz.alumni.web.servlet.AbstractDownloadServlet.doGet(AbstractDownloadServlet.java:53)
	at be.ugent.dbz.alumni.web.servlet.MembershipLetterDownloadServlet.doGet(MembershipLetterDownloadServlet.java:43)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.h13-feb-2009 11:37:52 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet MembershipLetterServlet threw exception
java.lang.IllegalStateException
	at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:421)
	at javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:118)
	at org.acegisecurity.context.HttpSessionContextIntegrationFilter$OnRedirectUpdateSessionResponseWrapper.sendError(HttpSessionContextIntegrationFilter.java:507)
	at be.ugent.dbz.alumni.web.servlet.AbstractDownloadServlet.doGet(AbstractDownloadServlet.java:59)
	at be.ugent.dbz.alumni.web.servlet.MembershipLetterDownloadServlet.doGet(MembershipLetterDownloadServlet.java:43)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
	at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
13-feb-2009 11:37:52 org.apache.catalina.core.StandardHostValve custom
SEVERE: Exception Processing ErrorPage[errorCode=404, location=/error.jsf]
java.lang.IllegalStateException
	at org.apache.coyote.Response.reset(Response.java:297)
	at org.apache.catalina.connector.Response.reset(Response.java:658)
	at org.apache.catalina.connector.Response.reset(Response.java:925)
	at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:417)
	at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:343)
	at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:287)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
ttp.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
	at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
	at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
	at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
	at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
	at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:740)
	at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:434)
	at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:349)
	at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:764)
	at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:124)
	at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:573)
	at org.apache.coyote.Response.doWrite(Response.java:560)
	at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353)
	... 44 more

The code i'm excecuting is not that special, so I'm going to show you the basics.

	
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String fileNameIdentifier = null;
		try {
			Map<String, String> paramMap = convertParamArrayMap(req.getParameterMap());
			for(Map.Entry<String, String> param : paramMap.entrySet()){
				if(!validId(param.getKey())){
					resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
					break;
				}
				fileNameIdentifier += " " + param.getValue();
			}

			OutputStream outputStream = resp.getOutputStream();
			resp.setContentType(getMimeType());
			resp.setHeader("Content-Disposition", "attachment; filename=\"" + getFilename(fileNameIdentifier) + "\"");

			fillContent(paramMap, outputStream);

			outputStream.flush();
			outputStream.close();
		} catch (Exception e) {
			// All exceptions are forwarded to the 404 page, the error is
			// available in the log
			LOGGER.fatal(e.getMessage(), e);
			resp.sendError(HttpServletResponse.SC_NOT_FOUND);
		}
	}

@Override
	public void fillContent(Map<String, String> paramMap, OutputStream outputStream) throws IOException {
		if (StringUtils.isNotBlank(paramMap.get("id")) && StringUtils.isNotBlank(paramMap.get("associationid"))) {
			Personalia personalia = null;
			Association association = null;
			try {
				personalia = alumniService.getPersonaliaForId(Long.valueOf(paramMap.get("id")));
				association = associationService.findAssociationFromId(Long.valueOf(paramMap.get("associationid")));
			} catch (NumberFormatException numberFormatException) {
				throw new RuntimeException("The id could not be parsed as a long");
			}
			if (personalia != null && association != null) {
				try {
					membershipLetterService.writeMembershipLetterOnStream(outputStream, personalia, association);
				} catch (DocumentException e) {
					throw new IOException(e);
				}
			} else {
				throw new RuntimeException("Personalia for id " + paramMap.get("id") + " or Association for id "
						+ paramMap.get("associationId") + " not found.");
			}
		}

	}

	@Override
	public void writeMembershipLetterOnStream(OutputStream outputStream, Personalia personalia, Association association)
			throws IOException, DocumentException {
		PdfReader reader = new PdfReader(templateFileName);
		PdfStamper stamper = new PdfStamper(reader, outputStream);

		personalia = personaliaDAO.merge(personalia);
		association = associationDAO.merge(association);

		membershipLetterPdfOutputHelper.writeMembershipLetterOnStamper(stamper, personalia, getMembershipLetterData()
				.getLogo(), association, getMembershipLetterData());

		stamper.setViewerPreferences(PdfWriter.PrintScalingNone);
		stamper.setFormFlattening(true);
		try {
			stamper.close();
			reader.close();
		} catch (Exception illegalStateException) {
			LOG.error(illegalStateException.getMessage(), illegalStateException);
		}
	}

public void writeMembershipLetterOnStamper(PdfStamper stamper, Personalia personalia, ImageWrapper logo, Association association ,MembershipLetterData membershipLetterData) throws IOException, DocumentException {
		Map<String, String> fields = new HashMap<String, String>();
		fillLetterFields(fields, membershipLetterData);
		fillPersonaliaFields(fields, personalia);
		fillAssociationFields(fields, association);
		write(stamper, fields, personalia.getUgentId(), logo);
	}

public void write(PdfStamper stamper, Map<String, String> fields, String ugentId, ImageWrapper logoUgent) throws IOException, DocumentException {
		write(stamper, fields);
		writeBarcode(stamper, ugentId, barcodeX, barcodeY);
		writeImage(stamper, logoUgent, logoUgentMaxWidth, logoUgentMaxHeight, logoUgentX, logoUgentY);
	}

public void write(PdfStamper stamper, Map<String, String> fields) throws IOException, DocumentException {
		writeFields(stamper, fields);
	}
private void writeFields(final PdfStamper stamper, Map<String, String> fields) throws IOException, DocumentException {
		LOGGER.debug("start writing fields");
		AcroFields form = stamper.getAcroFields();
		Map<String, Item> formFields = (HashMap<String, Item>) form.getFields();
		for (Entry<String, Item> field : formFields.entrySet()) {
			String value = (String) fields.get(field.getKey());
			if (value != null) {
				LOGGER.debug("writing " + field.getKey());
				form.setField(field.getKey(), value);
			}

		}
		LOGGER.debug("stop writing fields");
	}

I know it is allot of code but it comse from the multiple tiers in the application, i hope it is clear. We are using tomcat to run the application.

[Jelle Victoor]

This was a very stupid mistake. I had set the response.setstatus and my code continued. It did not matter where i go the error, i would get it every time because the set status was causing the abort.

sorry for this post.