Tomcat 7.x causing random read errors ?

Hello,

I have deployed a cxf (2.4.2) web service over Camel (2.8.0) on a Tomcat (7.x)
This WS receives an xml and a pdf file.
While reading the pdf file, there is randomly the following error.
I can't figure out if this is really a tomcat problem.
I used to have "Read timed out" socket exceptions before but it seems this has been solved by going from cxf 2.4.1 to 2.4.2.
I am a bit lost.
Thanks in advance for any help.

Luc

java.lang.ArrayIndexOutOfBoundsException: 8636
at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:379)
at org.apache.catalina.connector.InputBuffer.readByte(InputBuffer.java:300)
at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:108)
at java.io.FilterInputStream.read(FilterInputStream.java:66)
at java.io.FilterInputStream.read(FilterInputStream.java:66)
at java.io.PushbackInputStream.read(PushbackInputStream.java:122)
at org.apache.cxf.attachment.AttachmentDeserializer.readNext(AttachmentDeserializer.java:198)
at org.apache.cxf.attachment.LazyAttachmentCollection$1.hasNext(LazyAttachmentCollection.java:94)
at org.apache.cxf.transport.http.AbstractHTTPDestination.cacheInput(AbstractHTTPDestination.java:429)
at org.apache.cxf.transport.http.AbstractHTTPDestination.flushHeaders(AbstractHTTPDestination.java:453)
at org.apache.cxf.transport.http.AbstractHTTPDestination.flushHeaders(AbstractHTTPDestination.java:446)
at org.apache.cxf.transport.http.AbstractHTTPDestination$WrappedOutputStream.onFirstWrite(AbstractHTTPDestination.java:589)
at org.apache.cxf.io.AbstractWrappedOutputStream.write(AbstractWrappedOutputStream.java:42)
at com.ctc.wstx.io.UTF8Writer.flush(UTF8Writer.java:100)
at com.ctc.wstx.sw.BufferingXmlWriter.flush(BufferingXmlWriter.java:225)
at com.ctc.wstx.sw.BufferingXmlWriter.close(BufferingXmlWriter.java:198)
at com.ctc.wstx.sw.BaseStreamWriter._finishDocument(BaseStreamWriter.java:1400)
at com.ctc.wstx.sw.BaseStreamWriter.writeEndDocument(BaseStreamWriter.java:532)
at org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor$SoapOutEndingInterceptor.handleMessage(SoapOutInterceptor.java:282)
at org.apache.cxf.binding.soap.interceptor.SoapOutInterceptor$SoapOutEndingInterceptor.handleMessage(SoapOutInterceptor.java:270)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)
at org.apache.cxf.interceptor.AbstractFaultChainInitiatorObserver.onMessage(AbstractFaultChainInitiatorObserver.java:104)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:323)
at org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:77)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:263)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:118)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:208)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:223)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:205)
at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:113)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:184)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:163)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:403)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:301)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:162)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)