Problems reloading class

Hi,
I'm working with two spark solaris 9 servers in cluster running sun one 6.1 web servers. The servelets/jsp applications have problems reloading a changed class. The java applications are in a storage engine connected by nfs to the servers. We Ussually work in the master server that it's similar to the slave in its java and webserver configuration. there isn't any difference beetwen the servers in the java applications enviroment. But always we compile in the master server. The changed class loads correctly and quickly (few seconds) in the master server but the slave fails to load it. For the second server we must reload all the application trought the administration server, "load configuration files".
In the server log file i can see the following lines:
WebModule[dataj_dev]: WEB2680: Exception starting filter ControllerFilter java.lang.ClassFormatError: com/huji/data/system/RegularDataSystem (Extra bytes at the end of the class file) at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:537) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1717) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:983) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1431) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1301) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:141) at com.huji.data.ControllerFilter.class$(ControllerFilter.java:34) at com.huji.data.ControllerFilter.<clinit>(ControllerFilter.java:34) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:274) at java.lang.Class.newInstance0(Class.java:308) at java.lang.Class.newInstance(Class.java:261) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:261) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:322) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:120) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3271) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3747) at com.iplanet.ias.web.WebModule.start(WebModule.java:251) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1133) at org.apache.catalina.core.StandardHost.start(StandardHost.java:652) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1133) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:355) at org.apache.catalina.startup.Embedded.start(Embedded.java:995) at com.iplanet.ias.web.WebContainer.start(WebContainer.java:431) at com.iplanet.ias.web.WebContainer.startInstance(WebContainer.java:500) at com.iplanet.ias.server.J2EERunner.confPostInit(J2EERunner.java:161) [03/Sep/2007:14:41:13] failure (11314): WebModule[dataj_dev]: WEB2705: Context startup failed due to previous errors
what's wrong? why it happens?

The servers don't share the same instance dir, each webserver is locally installed. They only share the content directory: java classes , html files and cgi programs. Anyway may be that the secondary server has problem loading the class from the storage. I changed the parameter dynamicreloadinterval to make a bigest delay in this server. Before this change almost in the same time both the servers tryed to load the same class. I didn't test , i hope it works.
The issue is that if this true, i should see the same fenomena with other files types, not only with classes and it doesn't happen.

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Thanks, that's very helpful.
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To answer your questions...
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Rob Woollen <[email protected]> wrote:
Yes, 4 minutes is too long.
I actually own this problem for our next release so I'm pretty
interested to hear more about your situation.
In particular:
1) What hardware is this on?
2) How are you redeploying the application?
a) through the console
b) through the applications directory
c) weblogic.Deployer
d) wldeploy ant task
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If you (or anyone else) wants to give this information privately, you
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Max wrote:
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max
Rob Woollen <[email protected]> wrote:
You should almost never need to restart a server during development.
However, you will need to redeploy your application to pick-up class
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-- Rob
Max wrote:
Hello all,
We are developing applications for wlserver6.1 on JDK 1.3 and the
development
proccess is slow due to the fact that every time that we modify aclass
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or JSP´s) we have to restart the server o redeploy the applicationin order to
reload the new version of the class. I understand that this is becausethe JVM
does not support Hot Code Replace and the Server classloaders do notcheck for
changes in classes only in Servlets (we are running the server in
development
mode).
Is there a work around for this? A custom classloader perhaps? Thirdparty tools?
All replies welcome
Thanks
Max

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thank you to all those who helped me with dealing with time in my Movie class. My other problem is I can't return the charges (val) once a movie is hired. I need my Movie class to output the following when applied to the TestMovie class.
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//CPT12 - Assignment2
//Written by Suzanne Howarth, 88886, Tutor - Clemens Meyr
//This is the class of an object orientated programme to manage the hiring of movies
import java.util.*;
import java.text.*;
//Defined instance variables set to private
public class Movie {
//Defined constuctor for the Movie class
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         private String description;
         private String classification;
         private float dailyRate;
         private char status;
         private String hirer;
         private String s;
         private GregorianCalendar dob;
         private GregorianCalendar d;
         private GregorianCalendar dC;
         private double val;
         private long daysHired;
         private long age;
         private boolean valid;
//Defined accessors for the Movie class
    public String getID() {
        return ID;
    public String getDescription() {
        return description;
    public String getClassification() {
        return classification;
    public float getDailyRate() {
        return dailyRate;
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        return status;
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        return hirer;
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        age = (d.getTimeInMillis() - dob.getTimeInMillis())/(365*24*60*60*1000);
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        daysHired = (dC.getTimeInMillis() - d.getTimeInMillis())/(24*60*60*1000);
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        return dC;
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        val = daysHired * dailyRate;
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        System.out.println("Classification - " + classification);
        System.out.println("Status - " + status);
        System.out.println("Daily Rate - " + dailyRate);
        System.out.println("Hirer ID - " + hirer);
        System.out.println("Date and Time of hire - " + s);
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import java.util.GregorianCalendar;
public class TestMovie
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      GregorianCalendar dob1 = new GregorianCalendar(1989,01,22,15,15);
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         System.out.println("Movie " + mov.getID() + " could not be hired to " + hirer1ID);
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      GregorianCalendar d2 = new GregorianCalendar(2007,3,15,15,30);
      GregorianCalendar dob2 = new GregorianCalendar(1989,12,20,10,12);
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      if (mov.hire(hirer2ID, dob2, d2) == true)
         System.out.println("Movie " + mov.getID() + " is hired to " + mov.getHirer());
      else
         System.out.println("Movie " + mov.getID() + " cannot be hired to " + hirer2ID);
      // Completing the hiring of the movie
      GregorianCalendar d1C = new GregorianCalendar(2007,3,18,10,30);
      double val = mov.hireComplete(d1C);
      if ( val > 0.0 )
         System.out.println("Movie " + mov.getID() + " is returned by " + mov.getHirer());
         System.out.println("Total Charges = " + val);
      Another attempt to hire the movie (after earlier hire is completed,
      but with hirer too young to hire a PG rated movie)
      GregorianCalendar d3 = new GregorianCalendar(2007,3,19,16,30);
      GregorianCalendar dob3 = new GregorianCalendar(1995,12,20,10,12);
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      if (mov.hire(hirer3ID, dob3, d3) == true)
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      else
         System.out.println("Movie " + mov.getID() + " cannot be hired to " + hirer3ID);
      // Hiring the movie with the correct age again
      GregorianCalendar d4 = new GregorianCalendar(2007,3,19,18,30);
      GregorianCalendar dob4 = new GregorianCalendar(1985,12,20,10,12);
      String hirer4ID = "PC99999";
      if (mov.hire(hirer4ID, dob4, d4) == true)
         System.out.println("Movie " + mov.getID() + " is hired to " + mov.getHirer());
      else
         System.out.println("Movie " + mov.getID() + " cannot be hired to " + hirer4ID);
      // Printing the details of Movie object referred by mov
      mov.print();
}The problem must be with how I coded my Movie class. It just won't output that the movie has been returned and the total charges.
Any help would be very much appreciated.

Do u mean to put it like this:
//CPT12 - Assignment2
//Written by Suzanne Howarth, 88886, Tutor - Clemens Meyr
//This is the class of an object orientated programme to manage the hiring of movies
import java.util.*;
import java.text.*;
//Defined instance variables set to private
public class Movie {
//Defined constuctor for the Movie class
    public Movie(String movieID, String description, String classification, float dailyRate) {
        ID = movieID;
        this.description = description;
        this.classification = classification;
        status = 'A';
        this.dailyRate = dailyRate;
         private String ID;
         private String description;
         private String classification;
         private float dailyRate;
         private char status;
         private String hirer;
         private String s;
         private GregorianCalendar dob;
         private GregorianCalendar d;
         private GregorianCalendar dC;
         private double val;
         private long daysHired;
         private long age;
         private boolean valid;
//Defined accessors for the Movie class
    public String getID() {
        return ID;
    public String getDescription() {
        return description;
    public String getClassification() {
        return classification;
    public float getDailyRate() {
        return dailyRate;
    public char getStatus() {
        return status;
    public boolean hire(String hirerID, GregorianCalendar hirerDOB, GregorianCalendar dateTime) {
        hirer = hirerID;
        dob = hirerDOB;
        d = dateTime;
        boolean valid = false;
    if (status == 'A') {
            if (classification.equals("PG")) {
         valid = true;
        else {
         if (age<18) {
            valid = true;
    if (valid) {
     status = 'H';
    return valid;
    public String getHirer() {
        return hirer;
    public GregorianCalendar getDob() {
        return dob;
    public GregorianCalendar getD() {
        return d;
    public String getS() {
        SimpleDateFormat formatter = new SimpleDateFormat("d");
        GregorianCalendar d = new GregorianCalendar();
        s = formatter.format(d.getTime());
        return s;
    public long getAge() {
        age = (d.getTimeInMillis() - dob.getTimeInMillis())/(365*24*60*60*1000);
        return age;
    public double hireComplete(GregorianCalendar date_time2) {
        dC = date_time2;
        if ((status == 'H') && (val > 0.0)) {
            val = daysHired * dailyRate;
            return val;
        else
            return val = -1.0;
    public long getDaysHired() {
        daysHired = (dC.getTimeInMillis() - d.getTimeInMillis())/(24*60*60*1000);
        return daysHired;
    public GregorianCalendar getDC() {
        return dC;
    public double getVal() {
        return val;
    public void print() {
        System.out.println("Movie ID - " + ID);
        System.out.println("Movie - " + description);
        System.out.println("Classification - " + classification);
        System.out.println("Status - " + status);
        System.out.println("Daily Rate - " + dailyRate);
        System.out.println("Hirer ID - " + hirer);
        System.out.println("Date and Time of hire - " + s);
}I must be wrong because I am still not getting the desired output.

XML mapping inheritance problem; missing class indicator field

Hi!
I am currently working on a project which involves mapping a large domain model on a XSD schema. For this we use Toplink 10.1.3.1 which is mostly great. But now I have a problem while wanting to use class inheritance.
In my XSD I have the following defined
<xs:complexType name="Traject">
     <xs:sequence>
          <xs:element name="SoortTraject" type="SoortTraject"/>
     </xs:sequence>
</xs:complexType>
<xs:complexType name="SpecialTraject">
     <xs:complexContent>
          <xs:extension base="Traject">
               <xs:sequence>
                             [some elements]
               </xs:sequence>
          </xs:extension>
     </xs:complexContent>
</xs:complexType>My XML is an implementation of this XSD and looks like this
<Trajecten>
        <Traject xsi:type="SpecialTraject">
                 [implementation of the elements]
         </Traject>
</Trajecten>My domain model corresponts to the XSD, so there is a Traject object and an inherited SpecialTraject object.
In the mapping I used the Advanced properties->inheritance on both descriptors telling the Traject descriptor that it was the 'Root Parent Descriptor' ('Use class indicator field' -> 'use XML Schema Type attribute', 'Use class indicator dictionary') and the SpecialTraject what it Child Descriptor was ('Traject').
When I test my mapping it always results in the same error (no matter how I configure this inheritance mapping). It says :
[TOPLINK-44] missing class indicator field
Descriptor: XMLDescriptor(Traject --> [])What am I doing wrong? Does anybody know a sollution?
Best regards,
Jouke Stoel
Developer

This is the changed XML descriptor file. When I deploy the file it automaticly overrides the old file so it ain't possible that I was still using the wrong file
<toplink:class-indicator-mappings>
    <toplink:class-indicator-mapping>
        <toplink:class>Traject</toplink:class>
        <toplink:class-indicator xsi:type="xsd:string">Traject</toplink:class-indicator>
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    </toplink:class-indicator-mapping>
</toplink:class-indicator-mappings>I have posted the stacktrace but I had to translate a bit because my exception was in Dutch :)
Locale is a great invention
Exception [TOPLINK-44] (Oracle TopLink - 10g Release 3 (10.1.3.1.0) (Build 061004)): oracle.toplink.exceptions.DescriptorException
Exception description: Missing class indicator field of database row [UnmarshalRecord()].
Descriptor: XMLDescriptor(Traject --> [])
     at oracle.toplink.exceptions.DescriptorException.missingClassIndicatorField(DescriptorException.java:887)
     at oracle.toplink.internal.ox.QNameInheritancePolicy.classFromRow(QNameInheritancePolicy.java:84)
     at oracle.toplink.internal.ox.XMLRelationshipMappingNodeValue.processChild(XMLRelationshipMappingNodeValue.java:13)
     at oracle.toplink.internal.ox.XMLCompositeCollectionMappingNodeValue.startElement(XMLCompositeCollectionMappingNodeValue.java:62)
     at oracle.toplink.ox.record.UnmarshalRecord.startElement(UnmarshalRecord.java:352)
     at oracle.xml.parser.v2.NonValidatingParser.parseElement(NonValidatingParser.java:1288)
     at oracle.xml.parser.v2.NonValidatingParser.parseRootElement(NonValidatingParser.java:336)
     at oracle.xml.parser.v2.NonValidatingParser.parseDocument(NonValidatingParser.java:303)
     at oracle.xml.parser.v2.XMLParser.parse(XMLParser.java:205)
     at oracle.toplink.internal.ox.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:189)
     at oracle.toplink.internal.ox.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:147)
     at oracle.toplink.ox.XMLUnmarshaller.unmarshal(XMLUnmarshaller.java:228)
.

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