Skip to main content

CloneNotSupportedException

java.lang.CloneNotSupportedException

CloneNotSupportedException is described in the javadoc comments as:

Thrown to indicate that the clone method in class Object has been called to clone an object, but that the object's class does not implement the Cloneable interface.

Applications that override the clone method can also throw this exception to indicate that an object could not or should not be cloned.
author: unascribed version: 1.11, 12/19/03 see: java.lang.Cloneable see: java.lang.Object#clone() since: JDK1.0

Where is this exception thrown?

Following, is a list of exception messages cross-referenced to the source code responsible for throwing them. Click on the method link to view the code and see how the exception is thrown.

How is this exception thrown?

The following sub-sections identify where this exception is thrown, and how (or why) the code is throwing the exception.

Any source code quoted in this section is subject to the Java Research License unless stated otherwise.

java.lang.Enum.clone()

/**
     * Throws CloneNotSupportedException.  This guarantees that enums
     * are never cloned, which is necessary to preserve their 'singleton'
     * status.
     * @return (never returns)
     */
protected final Object clone() throws CloneNotSupportedException {
    throw new CloneNotSupportedException();
}

Source: "Java SE Downloads: Java SE 6 JDK Source Code", at: http://www.oracle.com/technetwork/java/javase/downloads/index.html

java.security.MessageDigest.clone()

/**    
     * Returns a clone if the implementation is cloneable.    
     * @return a clone if the implementation is cloneable.
     * @exception CloneNotSupportedException if this is called on an
     * implementation that does not support <code>Cloneable</code>.
     */
public Object clone() throws CloneNotSupportedException {
    if (this instanceof Cloneable) {
        return super.clone();
    } else {
        throw new CloneNotSupportedException();
    }
}

Source: "Java SE Downloads: Java SE 6 JDK Source Code", at: http://www.oracle.com/technetwork/java/javase/downloads/index.html

java.security.MessageDigestSpi.clone()

/**    
     * Returns a clone if the implementation is cloneable.    
     * @return a clone if the implementation is cloneable.
     * @exception CloneNotSupportedException if this is called on an
     * implementation that does not support <code>Cloneable</code>.
     */
public Object clone() throws CloneNotSupportedException {
    if (this instanceof Cloneable) {
        return super.clone();
    } else {
        throw new CloneNotSupportedException();
    }
}

Source: "Java SE Downloads: Java SE 6 JDK Source Code", at: http://www.oracle.com/technetwork/java/javase/downloads/index.html

java.security.Signature.clone()

/**
     * Returns a clone if the implementation is cloneable.
     * @return a clone if the implementation is cloneable.
     * @exception CloneNotSupportedException if this is called
     * on an implementation that does not support <code>Cloneable</code>.
     */
public Object clone() throws CloneNotSupportedException {
    if (this instanceof Cloneable) {
        return super.clone();
    } else {
        throw new CloneNotSupportedException();
    }
}

Source: "Java SE Downloads: Java SE 6 JDK Source Code", at: http://www.oracle.com/technetwork/java/javase/downloads/index.html

java.security.SignatureSpi.clone()

/**
     * Returns a clone if the implementation is cloneable.
     * @return a clone if the implementation is cloneable.
     * @exception CloneNotSupportedException if this is called
     * on an implementation that does not support <code>Cloneable</code>.
     */
public Object clone() throws CloneNotSupportedException {
    if (this instanceof Cloneable) {
        return super.clone();
    } else {
        throw new CloneNotSupportedException();
    }
}

Source: "Java SE Downloads: Java SE 6 JDK Source Code", at: http://www.oracle.com/technetwork/java/javase/downloads/index.html

Comments

Popular posts from this blog

Connection refused: No available router to destination

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators.
Symptom

The following exception occurs in WebLogic server logs. Most likely to occur during WebLogic server start-up, but similar exceptions may occur at other times.
java.net.ConnectException: t3://myserver:8000: Destination unreachable; nested exception is: java.net.ConnectException: Connection refused: connect; No available router to destination] at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:49) at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:773) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:363) at weblogic.jndi.Environment.getContext(Environment.java:307) at weblogic.jndi.Environment.getContext(Environment.java:277)
Cause
This message (Connection refused: connect; No available router to destination) is a kind of "catch…

BAD_CERTIFICATE - A corrupt or unuseable certificate...

This is a simple symptom-cause-solution blog entry only. I hope these blogs will help fellow administrators.
Symptom
In wls_utc, when trying to test a webservice using SSL, the following error message is received: javax.net.ssl.SSLKeyException: FATAL Alert:BAD_CERTIFICATE - A corrupt or unuseable certificate was received.
If SSL debugging is enabled, the following error also appears in the logs: ExecuteThread: '4' for queue: 'weblogic.kernel.Default (self-tuning)' <1254822672320>>
verification failed because RSA key public exponent [3] is too small
Cause
The certificate encryption is of a weaker strength than expected by newer versions of Java.
Solution
Add the flag "-Dweblogic.security.SSL.allowSmallRSAExponent=true" to the server startup parameters.
References


None.

WebLogic Admin Console

WebLogic Admin Console
The WebLogic Admin Console is a web-based, user interface used to configure and control a set of WebLogic servers or clusters (i.e. a "domain"). In any logical group of WebLogic servers there must exist one admin server, which hosts the WebLogic Admin Console application and manages the associated configuration files.
WebLogic Administrators will use the Administration Console for a number of tasks, including:
Starting and stopping WebLogic servers or entire clusters.Configuring server parameters, security, database connections and deployed applications.Viewing server status, health and metrics. Note: It is not strictly necessary to use the Weblogic Admin Console to perform these tasks, as they can be scripted using WLST (the WebLogic Scripting Tool).
Accessing the Admin Console
WebLogic Admin Console Url: http://hostname:port/console.
To access the WebLogic Administration Console, assuming the admin server has been started, goto the above url. Where hostname…