NotSerializableException while Jboss clustering

[Srikanth Adapa]

Hi all ,

I am trying to cluster an application in jboss 4.2.2GA , for which I am getting a NotSerializable exception as follows:

java.io.NotSerializableException: nextapp.echo2.webrender.Connection
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1527)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1492)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1410)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1168)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1527)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1492)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1410)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1168)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.java:1284)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:623)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:963)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1479)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1410)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1168)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at org.jboss.web.tomcat.service.session.SessionBasedClusteredSession.writeExternal(SessionBasedClusteredSession.java:175)
at org.jboss.web.tomcat.service.session.JBossCacheService.externalizeSession(JBossCacheService.java:1027)
at org.jboss.web.tomcat.service.session.JBossCacheService.putSession(JBossCacheService.java:316)
at org.jboss.web.tomcat.service.session.JBossCacheClusteredSession.processSessionRepl(JBossCacheClusteredSession.java:121)
at org.jboss.web.tomcat.service.session.JBossCacheManager.processSessionRepl(JBossCacheManager.java:1097)
at org.jboss.web.tomcat.service.session.JBossCacheManager.storeSession(JBossCacheManager.java:652)
at org.jboss.web.tomcat.service.session.InstantSnapshotManager.snapshot(InstantSnapshotManager.java:49)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:98)
at org.jboss.web.tomcat.service.session.JvmRouteValve.invoke(JvmRouteValve.java:84)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:675)

I am unable to understand why am I getting this exception stack trace.
Please respond me if any one have any idea about this.


Thank you

[Jaikiran Pai]

java.io.NotSerializableException: nextapp.echo2.webrender.Connection

You probably have this object in the session and when the session is being serialized, its throwing this exception because this object is not serializable (does not implement java.io.Serializable).

[Srikanth Adapa]

Hi,

Basically, I am using the Echo2 jars in my applications, of which the Connection class belongs to those. I have modified that Connection class making it to implement Serializable interface. Now, I got a new stacktrace pointing to RequestFacade.java

  11:22:51,362 ERROR [JBossCacheService] externalizeSession():
 exception occurred externalizing session SessionBasedClusteredSession[id: jFdwj9uBb2SnaFbZjiTSaQ**.node1
lastAccessedTime: 1219729960683 version: 17 lastOutdated: 0]
java.io.NotSerializableException: org.apache.catalina.connector.RequestFacade
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1156)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1509)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1474)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
        at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.java:1247)
        at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1461)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1392)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1150)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:326)
        at org.jboss.web.tomcat.service.session.SessionBasedClusteredSession.writeExternal(SessionBasedClusteredSession.java:175)
        at org.jboss.web.tomcat.service.session.JBossCacheService.externalizeSession(JBossCacheService.java:1027)
        at org.jboss.web.tomcat.service.session.JBossCacheService.putSession(JBossCacheService.java:316)
        at org.jboss.web.tomcat.service.session.JBossCacheClusteredSession.processSessionRepl(JBossCacheClusteredSession.java:121)
        at org.jboss.web.tomcat.service.session.JBossCacheManager.processSessionRepl(JBossCacheManager.java:1097)
        at org.jboss.web.tomcat.service.session.JBossCacheManager.storeSession(JBossCacheManager.java:652)
        at org.jboss.web.tomcat.service.session.InstantSnapshotManager.snapshot(InstantSnapshotManager.java:49)
        at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:98)
        at org.jboss.web.tomcat.service.session.JvmRouteValve.invoke(JvmRouteValve.java:84)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
        at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
        at java.lang.Thread.run(Thread.java:619)
  

And I also found that "org.apache.catalina.connector.RequestFacade" is found at "/jboss-4.2.2.GA-src/thirdparty/jboss/web/lib/jbossweb-src/org/apache/catalina/connector" package. But I am not finding way how to avoid this exception.


Please let me know if any of you have ever tried with clustering jboss!! I hope many of you actively participate in this discussion.


Thank you!!
Sri.
[ August 26, 2008: Message edited by: Ulf Dittmer ]

[Srikanth Adapa]

Hi,

Here is the test case I am testing with. You can please suggest me accordingly.

  public class SessionTestServlet extends WebContainerServlet implements
Serializable {
 
private static final long serialVersionUID = 1L;
 
public ApplicationInstance newApplicationInstance() {
 
return new SessionTest();
 
}
 
}
 
class SessionTest extends ApplicationInstance implements Serializable{
 
private static final long serialVersionUID = 1L;
 
public HttpServletRequest req;
public HttpServletResponse res;
public HttpSession session;
public Connection conn;
TextField objTextArea1;
TextField objTextArea2;
SplitPane objSplitPane;
 
public Window init() {
 
Window window = new Window();
window.setTitle("Welcome my Hibernate Application in Echo2");
ContentPane contentPane = new ContentPane();
window.setContent(contentPane);
contentPane.add(getSplitPane());
 
return window;
}
 
public Component getSplitPane() {
objSplitPane = new SplitPane(SplitPane.ORIENTATION_VERTICAL_TOP_BOTTOM,
new Extent(150));
Grid objGrid = new Grid(2);
objGrid.setInsets(new Insets(10));
 
objSplitPane.add(objGrid);
objTextArea1 = new TextField();
objTextArea2 = new TextField();
 
objGrid.add(new Label("Enter 1st no: "));
objGrid.add(objTextArea1);
objGrid.add(new Label("Enter 2nd no: "));
objGrid.add(objTextArea2);
 
Button objButton = new Button("Submit");
objButton.addActionListener(new CustomAL("Submit"));
objButton.setActionCommand("Submit");
objGrid.add(objButton);
 
return objSplitPane;
}
 
private class CustomAL implements ActionListener, Serializable{
 
private static final long serialVersionUID = 1L;
String s;
 
public CustomAL(String s) {
this.s = s;
}
 
public void actionPerformed(ActionEvent e) {
if (s.equals("Submit")) {
 
System.out.println("now we are in Submit");
conn = WebContainerServlet.getActiveConnection();
System.out.println("connection object : " + conn);
req = conn.getRequest();
res = conn.getResponse();
session = req.getSession();
System.out.println("Session Object" + session);
ApplicationInstance aplicationIns = SessionTest.getActive();
 
session.setAttribute("a1", objTextArea1.getText());
session.setAttribute("a2", objTextArea2.getText());
session.setAttribute("aplicationIns", aplicationIns);
 
Button objButton = new Button("continue");
//Button objButton3 = new Button("Moveforward");

objButton.addActionListener(new CustomAL("continue"));
//objButton3.addActionListener(new CustomAL("Moveforward"));

objButton.setActionCommand("continue");
objSplitPane.removeAll();
objSplitPane.add(objButton);
//objSplitPane.add(objButton3);
objSplitPane.add(new Label(session.toString()));
 
aplicationIns = (ApplicationInstance) session
.getAttribute("aplicationIns");
 
} else if (s.equals("continue")) {
 
objSplitPane.removeAll();
try {
System.out.println("now we are in continue");
 
ApplicationInstance aplicationIns = (ApplicationInstance) session
.getAttribute("aplicationIns");
String s1 = (String) session.getAttribute("a1");
String s2 = (String) session.getAttribute("a2");
int a1 = Integer.parseInt(s1);
int a2 = Integer.parseInt(s2);
 
//Button objButton = new Button("come again");
Button objButton2 = new Button("First");
//objButton2.setActionCommand("First");
//objButton.setActionCommand("come again");
    objButton2.addActionListener(new CustomAL("Fist"));
//objButton.addActionListener(new CustomAL("come again"));
objSplitPane.add(new Label(
"some of the two (above)  intgers : " + (a1 + a2)));
//objSplitPane.add(objButton);
objSplitPane.add(objButton2);
 
} catch (NumberFormatException e1) {
 
System.out.println("we are catch of continue");
objSplitPane.add(new Label("Please enter two intgers.!!!!!! "));
Button objButton = new Button("Try again");
objButton.setActionCommand("come again");
objButton.addActionListener(new CustomAL("come again"));
objSplitPane.add(objButton);
e1.printStackTrace();
}
 
} else {
 
System.out.println("now we are in else");
objSplitPane.removeAll();
 
Grid objGrid = new Grid(2);
objGrid.setInsets(new Insets(10));
 
objSplitPane.add(objGrid);
objGrid.add(new Label("Enter 1st no: "));
objGrid.add(objTextArea1);
objTextArea1.setText("");
objTextArea2.setText("");
objGrid.add(new Label("Enter 2nd no: "));
objGrid.add(objTextArea2);
 
Button objButton = new Button("Submit");
objButton.addActionListener(new CustomAL("Submit"));
objGrid.add(objButton);
}
}
}
}  

Thank you!!

Sri

[Ulf Dittmer]

Please do not post the same question to multiple forums: CarefullyChooseOneForum

Let's continue the discussion in this duplicate thread.