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POEOFException when reading serialized object in Servlet
 

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    <p>I have an applet trying to send java serialized object to a servlet (hosted in Tomcat 6). The URLs are correct and the applet reaches the correct servlet, but when it comes to reading anything on the servlet side, I get an error.</p> <p>Here is the applet code :</p> <pre><code> String adresse = "/Applic_ClientsPartners/NewMemberServlet"; URL page = getDocumentBase(); String protocole = page.getProtocol(); String host = page.getHost(); int port = page.getPort(); System.out.println(protocole + "://" + host + ":" + port + adresse); URL serv = new URL(protocole, host, port, adresse); URLConnection conn = serv.openConnection(); conn.setUseCaches(false); conn.setDefaultUseCaches(false); //conn.setRequestProperty("Content-Type", "application/x-java-serialized-object"); conn.setRequestProperty("Content-Type", "application/octet-stream"); conn.setDoInput(true); conn.setDoOutput(true); System.out.println("Connection open"); ObjectOutputStream oos = new ObjectOutputStream(conn.getOutputStream()); ObjectInputStream ois = new ObjectInputStream(conn.getInputStream()); System.out.println("Envoi de 'test'"); //sending a test String String t = "test"; oos.writeObject(t); System.out.println("test flush"); oos.flush(); System.out.println("test between flush & writeObject"); oos.writeObject(nouveau); //this is a serializable custom object oos.flush(); //Boolean result = ois.readBoolean(); ois.close(); oos.close(); System.out.println("Streams fermés"); //streams closed successfully </code></pre> <p>Here is the servlet code :</p> <pre><code> response.setContentType("application/octet-stream"); ObjectInputStream ois = new ObjectInputStream(request.getInputStream()); ObjectOutputStream oos = new ObjectOutputStream(response.getOutputStream()); System.out.println("AVAILABLE " + ois.available()); System.out.println("Pré read test"); String t = (String) ois.readObject(); System.out.println(t + " lu"); Cards.Member nouveau = (Cards.Member) ois.readObject(); System.out.println("Post read test"); oos.close(); ois.close(); System.out.println("Streams fermés"); //Streams closed successfully return; </code></pre> <p>I have a try ... catch(IOException ex) surrounding both of course. The error is the following : </p> <pre><code> java.io.EOFException at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2554) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1297) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at Servlets.NewMemberServlet.doPost(NewMemberServlet.java:96) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:619) </code></pre> <p>I really don't understand what's happening here : The servlet's ObjectInputStream seems to get nothing, but I have another applet-servlet in the same web project, albeit with an http tunnel, and they're working perfectly?!</p> <p>Any help would be greatly appreciated :)</p>
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    1. COThere are two calls to .readObject(), which is the one raising the exception?
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    2. COAnd what are the test outputs that you see on standard out?
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    3. COThe first call to readObject() throws the Exception; as for the test outputs, all of them are displayed for the applet, but the servlet stops at "Pré read test" (so just before the first call to readObject()). Hope this helps.
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