Develop Reference

NoClassDefFoundError for DataSourceFactory on starting Tomcat9 server?

I am deploying a JAR file to the classpath/lib folder which contains the customized subclass of org.apache.tomcat.jdbc.pool.DataSourceFactory and I am feeding it as a factory class for dataSource's Resource tag in server.xml. The appropriate libraries are being added (Hence no compile time error) but on starting the server it is giving the the following error log and failing to start :
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8013]]
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at org.apache.catalina.startup.Catalina.start(Catalina.java:682)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:350)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:492)
Caused by: java.lang.NoClassDefFoundError: org/apache/tomcat/jdbc/pool/DataSourceFactory
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.naming.factory.FactoryBase.getObjectInstance(FactoryBase.java:61)
at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
at org.apache.naming.NamingContext.lookup(NamingContext.java:840)
at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
at org.apache.naming.NamingContext.lookup(NamingContext.java:827)
at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1015)
at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:556)
at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:252)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:762)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
... 7 more
Caused by: java.lang.ClassNotFoundException: org.apache.tomcat.jdbc.pool.DataSourceFactory
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 32 more
Can anybody help me? any information will be helpful. Thank you in advance ;-)

Getting Rita.WordNet to work

According to Rita Homepage you just have to download Rita.jar and
WordNet-3.1 and add both to thebuild path of your java project.
I did it like that and everytime i try to use it:
RiWordNet wordNet = new RiWordNet(Test.class.getResource("/WordNet-3.1").getPath());
I get:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at rita.wordnet.jwnl.util.factory.Element.install(Unknown Source)
at rita.wordnet.jwnl.JWNL.initialize(Unknown Source)
at rita.RiWordNet.initWordNet(Unknown Source)
at rita.RiWordNet.<init>(Unknown Source)
at rita.RiWordNet.<init>(Unknown Source)
at de.hof.iisys.relationExtraction.analyzer.utils.Rita.main(Rita.java:13)
Caused by: rita.wordnet.jwnl.JWNLException: The properties file must specify a dictionary path
at rita.wordnet.jwnl.util.factory.AbstractValueParam.create(Unknown Source)
at rita.wordnet.jwnl.dictionary.FileBackedDictionary.installStatic(Unknown Source)
... 10 more
Caused by: rita.wordnet.RiWordNetError:
[ERROR] Couldn't find file: .\WordNet-3.1\dict\index.verb
at rita.wordnet.WordnetDictionaryFile.openFile(Unknown Source)
at rita.wordnet.jwnl.dictionary.file.AbstractDictionaryFile.open(Unknown Source)
at rita.wordnet.jwnl.dictionary.file.DictionaryCatalog.open(Unknown Source)
at rita.wordnet.jwnl.dictionary.file.DictionaryCatalogSet.open(Unknown Source)
at rita.wordnet.jwnl.dictionary.file_manager.FileManagerImpl.<init>(Unknown Source)
at rita.wordnet.jwnl.dictionary.file_manager.FileManagerImpl.create(Unknown Source)
at rita.wordnet.jwnl.util.factory.AbstractValueParam.create(Unknown Source)
... 11 more

The data files are no longer supplied as part of the installation. You need to download the WordNet version for your platform and then pass it to the constructor, as documented here.

CodenameOne stopped working after build

I have an odd issue with codenameone, and I'm not even sure what went wrong. I've tried to "send windows phone build", and don't think I have changed anything else since then. However, after I did so the simulator wouldn't launch and kept saying my imports were wrong. They weren't, the suggested solution was importing once that were already in.
The errors I get
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.codename1.impl.javase.Simulator.main(Simulator.java:59)
Caused by: java.lang.ClassNotFoundException: com.mycompany.myapp.MyApplication
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.findSystemClass(Unknown Source)
at com.codename1.impl.javase.ClassPathLoader.findClass(ClassPathLoader.java:100)
at com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:50)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.codename1.impl.javase.Executor.main(Executor.java:45)
... 5 more
All the classes he can't find are actually in my solution, I already tried re-adding them to the build path. Any suggestions?

That is odd.
First check that you indeed still have the package com.mycompany.myapp where you have the public class MyApplication. Do a clean build of the project and see if this class makes it into the jar file under the dist folder.

How to run RMI Chat Application in JAVA in Eclipse IDE

I am developing a RMI Chat application in Java. I am trying to run simple RMI application in eclipse IDE. But it issues following problem. I know how to run it from command prompt and its running without any problem. If you could suggest me the ways to run RMI application in Eclipse IDE is really appreciated. Thank you!
Error:
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: examples.credit.CreditChecker
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: examples.credit.CreditChecker
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadProxyClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
at java.io.ObjectInputStream.readProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 13 more

Sorry. i am not sure about that it is right or wrong. because i have not work on RMI
applications. but i am sure that following link solve your problem.
running rmi server, classnotfound

Install4j is bypassing the custom installation steps

We have an application packed with install4j.
The initial step is to choose between typical and custom installations.
The custom installation is usually bringing up the option to choose the localsettings folder, the appdata folder and in the next step, the installation folder (default: Program Files).
For some reason, in a specific environment, when checking neither of the options, the installation proceeds without asking for the desired folder paths.
An error file was created as well:
java.lang.ClassNotFoundException: I4jScript_Internal_12
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.install4j.runtime.installer.ContextImpl.runScript(Unknown Source)
at com.install4j.runtime.installer.ContextImpl.runScript(Unknown Source)
at com.install4j.runtime.installer.ContextImpl.runBooleanScript(Unknown Source)
at com.install4j.runtime.installer.ContextImpl.runBooleanScript(Unknown Source)
at com.install4j.runtime.installer.ContextImpl.runBooleanScript(Unknown Source)
at com.install4j.runtime.installer.controller.Controller.executeActions(Unknown Source)
at com.install4j.runtime.installer.controller.Controller.handleCommand(Unknown Source)
at com.install4j.runtime.installer.controller.Controller.start(Unknown Source)
at com.install4j.runtime.installer.Installer.main(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)
at com.install4j.runtime.launcher.WinLauncher.main(Unknown Source)
Could you please let me know, what could be the reason for this behavior?

The class that is not found is for a script in your install4j project. This can only happen if there is an inconsistency in your installation directory, i.e. if .install4j/user.jar and .install4j/i4jparams.conf are not from the same installer.