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Getting java.lang.NoClassDefFoundError: Could not initialize class oracle.jdbc.OracleDriver exception Hot Network Questions Why did 1990s-2000s LCD all use 60 Hz refresh?. Buy a brick single family house in massachusetts

What Is java.lang.NoClassDefFoundError? When the Java Runtime runs a Java program, it does not load all the classes and dependencies at once. Instead, it calls upon the Java Classloader to load classes in memory as-and-when-required. While loading a class, if the Classloader cannot find the class’s definition, it throws the NoClassDefFoundError.May 13, 2022 · java.lang.IllegalAccessError: class org.apache.spark.storage.StorageUtils$ (in unnamed module @0x12a94400) cannot access class sun.nio.ch.DirectBuffer (in module java.base) because module java.base does not export sun.nio.ch to unnamed module I'm trying to connect to a Apache Ignite server with Apache Ignite built-in tool, SQLLine. I get the error: java.lang.NoClassDefFoundError: Could not initialize class org.apache.ignite.IgniteJdbcThinDriver. Background. I have Apache Ignite running in a container and CentOS7 running in another container.Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers.So, the java.lang.noclassdeffounderror: could not initialize class error by our server means it cannot locate the class file. It can be caused by different reasons that are listed below. The issue can be in the static block (also called a static initializer).I think ill-behaved plugins could cause ImageIO to crash during initialization and cause the problem you see. And to answer one of your questions, yes, any Java 7 JRE must contain java.awt.* and javax.imageio.* packages. – Harald K.Aug 4, 2017 · Apparently it was an issue with the server environment, probably the environment variables where not pointing to the right place, don't know for sure but after we talk about it the person in charge fixed the problem. Could not initialize class org.apache.jmeter.protocol.http.proxy.ProxyControl Hot Network Questions Looking for a series of books that starts with a girl looking in her fridge, realizing she doesn’t like what’s in there and switches itSame goes for the name of the class inside the file. 2) Location: Make sure the WEB-INF you put the file in is the same WEB-INF used to run the server. 3) You are putting the MyClassR.class file in the classpath, and not MyClassR.java right? 4) You put the package statement at the top of the class definition. Jun 28, 2021 · I have seen this: java.lang.NoClassDefFoundError: Could not initialize class XXX And this: Different methodologies for solving bugs that only occur in production But my question is, given what the ... 20. I'm working on XUbuntu 13.04 and developing swing applications. As I just wanted to try that application I ran into java.lang.NoClassDefFoundError: Could not initialize class java.awt.Toolkit on startup. I've found several questions about server/client vms and noticed that I have a server VM and that for Linux 64 there is no client VM anymore.May 15, 2017 · There is a solution to this problem (Cassandra Startup failure on ARM64 machine (java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native)), Soultion suggests changes in cassandra-env.sh. I tried it but it is not working for me. I checked with these options (separately) in cassandra-env.sh While writing on ES through hadoop job ,it freezes with logs as :Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.common.lucene.Lucene,What might be the reaso...This is another common reason for java.lang.NoClassDefFoundError, when your class performs some static initialization in a static block like many Singleton classes initialized itself on the static block to take advantage of thread-safety provided by JVM during the class initialization process, and if static block throws an Exception, the class ...I am trying to migrate a project from Java8 into Java9 but I am running into the run time exception below, I tried every possible solution suggested by the Stack-overflow community and other blogs ...20. Try running this code in a constructor of a servlet. System.setProperty ("java.awt.headless", "true"); or. Use this parameter in the startup script of the server: -Djava.awt.headless=true. Here is an example of this problem documented and explaned in Apache POI when you want to create a sheet with auto size columns.Sep 6, 2014 · Part of DBhelper.java class (There are also other static members, the full code is below): public class DBhelper { public static String getString() {return "Hi!";} } And the exception: HTTP Status 500 - Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.sher.wtpractice.dao.DBhelper You're probably missing some dependant library. In Eclipse you can look inside the jar file from project explorer and verify that there is a package 'org.apache.axis.client' and it contains class AxisClient. (If you're not in Eclipse then otherwise you can just unpack your jar and see that the class is there - many possibilities for that, you ... Oct 25, 2020 · java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7 I don't understand why this happens because I'm not even using Gradle! I'm using Maven as in any of my Spring Boot Projects but this problem only happens whenever I add the Spring Data Cassandra Dependency. Could not initialize class org.nd4j.linalg.factory.Nd4j in docker container. I am trying to import a KERAS file in a docker container with a program that has the following java code sample: String weights = getFile (_modelFile).getAbsolutePath (); String modelConfiguration = getFile (_configFile).getAbsolutePath (); _model = KerasModelImport ...That also worked just fine for me while using OpenJDK 11. w/o any code modification. I am using java.base.* enc/dec on my fronted class instead of javax.xml.bind.DatatypeConverter, but jjwt (0.9.0) brings it back in when generating the token.I am using Windows10, eclipse-neon with JDK1.8 version, I am getting the following exception. Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.jav...Jasperreport in Java 11. java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser Hot Network Questions Paid beta seems to have skipped large portions of my manuscriptAfter much searching, I found several instances of this including java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7, but most are older posts on older versions of gradle and groovy or they are related to android. Here is my version info:Aug 4, 2017 · Apparently it was an issue with the server environment, probably the environment variables where not pointing to the right place, don't know for sure but after we talk about it the person in charge fixed the problem. Weblogic Start Failed java.lang.NoClassDefFoundError: weblogic/Server Hot Network Questions What are the conditions necessary for a programming language to have no undefined behavior?Yes, Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found.Jan 11, 2022 · Could not initialize class org.nd4j.linalg.factory.Nd4j in docker container. I am trying to import a KERAS file in a docker container with a program that has the following java code sample: String weights = getFile (_modelFile).getAbsolutePath (); String modelConfiguration = getFile (_configFile).getAbsolutePath (); _model = KerasModelImport ... Assuming by 'standard' you both mean Oracle, there is no difference in JSSE between Oracle and OpenJDK (and no difference in the rest of JCE except that in versions before late 2017 Oracle defaulted to the 'limited' crypto policy due to former US export rules, and you needed to add the 'unlimited policy' download, while OpenJDK ddi not).java.lang.NoClassDefFoundError: Could not initialize class org.jetbrains.kotlin.com.intellij.pom.java.LanguageLevel 5 Difficulties enabling Kotlin in React Native Expo with Bare WorkflowOct 25, 2020 · java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7 I don't understand why this happens because I'm not even using Gradle! I'm using Maven as in any of my Spring Boot Projects but this problem only happens whenever I add the Spring Data Cassandra Dependency. Jun 23, 2017 · I have updated my dependecies like you said in your comment and i have this now : org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org. Jan 5, 2021 · 1. I've decided to post this question because it took me the whole morning to find a solution... especially because the most common reason for java.lang.NoClassDefFoundError: Could not initialize class weblogic.jndi.Environment to occur, is when weblogic.jar and wlfullclient.jar aren't being properly located by any of IDE, WebApp, or WL. 4 Answers. This problem is caused by not including the asm dependencies that cglib has. Solution 1: Add the correct versions of asm and asm-util to your classpath. Solution 2: Use the cglib-nodep version (which includes both asm dependencies). I can't thank you enough for your valuable answer for the problem.Downloaded apache 3.2.0 the latest one as well as the hadoop file java Java SE Development Kit 17.0.1 is installed too i am not even able to initialize input : import pyspark from pyspark.sql importIf the exception message says "Could not initialize class...", as it does in this question, then the class does exist and can be found, but the JVM has already tried and failed to perform static initialization on the class and so gives up doing it again. –Yes, Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found.Jan 6, 2020 · 1. That is almost certainly not the complete stack trace. Either that stack trace or an earlier one in the log file will tell you what caused the initialization of sun.awt.X11.XToolkit to fail. However, I'd hazard a guess that the root cause is that the JVM running the web countainer is "headless"; i.e. it doesn't have an accessible display. Jun 23, 2017 · I have updated my dependecies like you said in your comment and i have this now : org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org. Aug 10, 2015 · Spark Error: Could not initialize class org.apache.spark.rdd.RDDOperationScope. I've created a spark standalone cluster on my laptop, then I go into an sbt console on a spark project and try to embed a spark instance as so: val conf = new SparkConf ().setAppName ("foo").setMaster (/* Spark Master URL*/) val sc = new SparkContext (conf) sc ... Sep 23, 2014 · I want to use SAP JCo to select user data for my Java program. But all I got is: Sep 23, 2014 1:34:28 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [ May 13, 2022 · java.lang.IllegalAccessError: class org.apache.spark.storage.StorageUtils$ (in unnamed module @0x12a94400) cannot access class sun.nio.ch.DirectBuffer (in module java.base) because module java.base does not export sun.nio.ch to unnamed module Oct 4, 2018 · If this specific jar doesn't suit you, there are a few others where chis class could be found. If you use Eclipse, there is a handy tool that allows you to see what jars contain the class you need, and this way you can see what makes most sense given what you are doing. Under Mac, you can press CMD+Shift+T and enter the class name. Hope this helps. I had this issue when working on a spring-boot application. The problem was caused by hibernate-validator 6.0.11 which seems to have an erroneous dependency on javax validation-api 2.0.1.Final. The solution that worked for me is to convert your object to a class that extends Serializable and just instantiate it where you need it. So basically, if I'm not wrong you have. object test { def foo = ... } which would be used as test.foo in your main, but you need at minimum. class Test extends Serializable { def foo = ...Apr 2, 2019 · NoClassDefFoundError: Could not initialize class org.apache.cxf.attachment.AttachmentUtil means that JVM failed to initialize the AttachmentUtil class.. Apache CXF 3.3.X should support JDK 11 as per FAQ. I have updated my dependecies like you said in your comment and i have this now : org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.I want to use SAP JCo to select user data for my Java program. But all I got is: Sep 23, 2014 1:34:28 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [And I get the following error: java.lang.NoClassDefFoundError: Could not initialize class org.apache.spark.eventhubs.EventHubsConf$ Cluster Configuration: Databricks Runtime Version: 7.0 (includes Apache Spark 3.0.0, Scala 2.12) Driver & Worker Type: 14.0 GB Memory, 4 Cores, 0.75 DBU Standard_DS3_v2; I have installed the following library:Jul 27, 2020 · 1 Answer. You shouldn't need to import util.HibernateUtil. You may need to either declare the HibernateUtil class as static eg public static class HibernateUtils { and then using by writing HibernateUtil.doAThing (); or instantiate a HibernateUtil Object eg HibernateUtil hibUtil = new HibernateUtil (); and use hibUtil.doAThing (); instead.For ... Getting java.lang.NoClassDefFoundError: Could not initialize class oracle.jdbc.OracleDriver exception Hot Network Questions Why did 1990s-2000s LCD all use 60 Hz refresh?Sep 4, 2016 · "java.lang.NoClassDefFoundError: Could not initialize class org.apache.xml.security.Init" the confusing part is if I remove the xmlsec.jar from libs, it still knows the . import "org.apache.xml.security.Init" but when I delete that and try to rewrite the same: import "org.apache.xml.security.Init" I am using Windows10, eclipse-neon with JDK1.8 version, I am getting the following exception. Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.jav...Oct 20, 2012 · Here's a snippet of how a test calls Order api when it fails. val orderNumber = Order.createOrder () This is the entire stack trace when the test fails: java.lang.NoClassDefFoundError: Could not initialize class com.api.Order$ at com.CreateOrder.setUpOnce (CreateOrder.scala:35) Line 35 in that class, CreateOrder.scala is: Prerequisites I'm trying to rewrite test written with Mockito to avoid open Kotlin classes. For that I use Annotations API as most similar to those in Mockito. In example on website I see an @InjectMockKs over TrafficSystem class without...1 Usually it is caused by class conflict. There is multiple version of the jar used in your project,and java picked the incorrect one. You can check which version is really in dependency hierarchy by passing the artifactId.I keep getting java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser The full stacktrace is: java.lang ...5 Answers. I think you might be using the wrong version of Java. From the doc: Spark runs on Java 8/11, Scala 2.12, Python 3.6+ and R 3.5+. Python 3.6 support is deprecated as of Spark 3.2.0. Java 8 prior to version 8u201 support is deprecated as of Spark 3.2.0. For the Scala API, Spark 3.2.0 uses Scala 2.12.Jan 9, 2021 · Assuming by 'standard' you both mean Oracle, there is no difference in JSSE between Oracle and OpenJDK (and no difference in the rest of JCE except that in versions before late 2017 Oracle defaulted to the 'limited' crypto policy due to former US export rules, and you needed to add the 'unlimited policy' download, while OpenJDK ddi not). Oct 20, 2012 · Here's a snippet of how a test calls Order api when it fails. val orderNumber = Order.createOrder () This is the entire stack trace when the test fails: java.lang.NoClassDefFoundError: Could not initialize class com.api.Order$ at com.CreateOrder.setUpOnce (CreateOrder.scala:35) Line 35 in that class, CreateOrder.scala is: Aug 1, 2020 · Glassfish 5 will not start after enable-secure-admin command 2 java.lang.NoSuchMethodError: sun.security.ssl.SSLSessionImpl.<init> in Spring, Hibernate and JSF project running on Glassfish with Java 8 20. I'm working on XUbuntu 13.04 and developing swing applications. As I just wanted to try that application I ran into java.lang.NoClassDefFoundError: Could not initialize class java.awt.Toolkit on startup. I've found several questions about server/client vms and noticed that I have a server VM and that for Linux 64 there is no client VM anymore.Jan 9, 2021 · Assuming by 'standard' you both mean Oracle, there is no difference in JSSE between Oracle and OpenJDK (and no difference in the rest of JCE except that in versions before late 2017 Oracle defaulted to the 'limited' crypto policy due to former US export rules, and you needed to add the 'unlimited policy' download, while OpenJDK ddi not). Could not initialize class org.apache.jmeter.protocol.http.proxy.ProxyControl Hot Network Questions Looking for a series of books that starts with a girl looking in her fridge, realizing she doesn’t like what’s in there and switches itPart of DBhelper.java class (There are also other static members, the full code is below): public class DBhelper { public static String getString() {return "Hi!";} } And the exception: HTTP Status 500 - Handler processing failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.sher.wtpractice.dao.DBhelperFor me the issue was due to the fact that in my pom.xml Java 13 was mentioned, on the server machine java 17 was installed. So updated server java version to be what it is in pom.xml If you have multiple versions of JDK on Linux please use this command to choose the correct oneI think ill-behaved plugins could cause ImageIO to crash during initialization and cause the problem you see. And to answer one of your questions, yes, any Java 7 JRE must contain java.awt.* and javax.imageio.* packages. – Harald K.Prerequisites I'm trying to rewrite test written with Mockito to avoid open Kotlin classes. For that I use Annotations API as most similar to those in Mockito. In example on website I see an @InjectMockKs over TrafficSystem class without...6. Due to the recent vulnerability found on Log4j, We were tasked to move to version >= 2.16.0. Initially, my project was using <version>1.2.17</version>. After adding the necessary dependency, and making the necessary changes, on initiating a request I get the below error: Caused by: java.lang.NoClassDefFoundError: Could not initialize class ...20. Try running this code in a constructor of a servlet. System.setProperty ("java.awt.headless", "true"); or. Use this parameter in the startup script of the server: -Djava.awt.headless=true. Here is an example of this problem documented and explaned in Apache POI when you want to create a sheet with auto size columns.I am using Windows10, eclipse-neon with JDK1.8 version, I am getting the following exception. Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.jav...There is a solution to this problem (Cassandra Startup failure on ARM64 machine (java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native)), Soultion suggests changes in cassandra-env.sh. I tried it but it is not working for me. I checked with these options (separately) in cassandra-env.shJul 25, 2019 · I installed apache-jmeter-5.1.1 and java 1.8.0_221 (8), and was walking through the getting started guide to build a web test plan in the GUI. But when I click save to save the Test Plan I receive the below error: Uncaught Exception java.lang.NoClassDefFoundError: Could not initialize class org.apache.jmeter.gui.util.FileDialoger. Nov 9, 2022 · What Is java.lang.NoClassDefFoundError? When the Java Runtime runs a Java program, it does not load all the classes and dependencies at once. Instead, it calls upon the Java Classloader to load classes in memory as-and-when-required. While loading a class, if the Classloader cannot find the class’s definition, it throws the NoClassDefFoundError. I had this issue when working on a spring-boot application. The problem was caused by hibernate-validator 6.0.11 which seems to have an erroneous dependency on javax validation-api 2.0.1.Final.I want to use SAP JCo to select user data for my Java program. But all I got is: Sep 23, 2014 1:34:28 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [Spark Error: Could not initialize class org.apache.spark.rdd.RDDOperationScope. I've created a spark standalone cluster on my laptop, then I go into an sbt console on a spark project and try to embed a spark instance as so: val conf = new SparkConf ().setAppName ("foo").setMaster (/* Spark Master URL*/) val sc = new SparkContext (conf) sc ...Nov 20, 2020 · I tried copying a bunch of custom plugins into my C:\\apache-jmeter-5.3\\lib\\ext folder. But when I try to open C:\\Projects\\centaurjmeter\\src\\test\\unittests\\mytree\\loadtest.mytree.jmx, I get this err... Aug 1, 2020 · Glassfish 5 will not start after enable-secure-admin command 2 java.lang.NoSuchMethodError: sun.security.ssl.SSLSessionImpl.<init> in Spring, Hibernate and JSF project running on Glassfish with Java 8 Jul 8, 2012 · I have the following code that's trying to establish a connection to a remote database. It's throwing an exception, and I can't figure out why. import java.util.List; import java.util.Arr... Weblogic Start Failed java.lang.NoClassDefFoundError: weblogic/Server Hot Network Questions What are the conditions necessary for a programming language to have no undefined behavior?Glassfish 5 will not start after enable-secure-admin command 2 java.lang.NoSuchMethodError: sun.security.ssl.SSLSessionImpl.<init> in Spring, Hibernate and JSF project running on Glassfish with Java 8While writing on ES through hadoop job ,it freezes with logs as :Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.common.lucene.Lucene,What might be the reaso...Jasperreport in Java 11. java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser Hot Network Questions Removing certain elements from a list of listsI had this issue when working on a spring-boot application. The problem was caused by hibernate-validator 6.0.11 which seems to have an erroneous dependency on javax validation-api 2.0.1.Final.Dec 21, 2021 · Following this cause: Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.fasterxml.jackson.databind.ObjectMapper The class is there (at least I can find it manually). In my build.gradle I have these two related dependencies: Jun 23, 2017 · I have updated my dependecies like you said in your comment and i have this now : org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org. It seems Apache POI is trying to load the class org.apache.xmlbeans.XMLOptions but it cannot find this class. The message Could not initialize class SomeClass indicates that the JVM has twice tried and failed to load and statically initialize the class SomeClass. In this case, the class in question is org.apache.poi.POIXMLDocument.I tried copying a bunch of custom plugins into my C:\\apache-jmeter-5.3\\lib\\ext folder. But when I try to open C:\\Projects\\centaurjmeter\\src\\test\\unittests\\mytree\\loadtest.mytree.jmx, I get this err...

This is a missing jars in the class path issue. I had this issue and found that with by adding the missing jars to the class path it resolved the issue. From the below article java.dzone.com article I found that the minimal jars necessary are...Now The versions numbers have changed but with these libraries only I managed to get it working.. Class wp rest term meta fields

java.lang.noclassdeffounderror could not initialize class

I have the following code that's trying to establish a connection to a remote database. It's throwing an exception, and I can't figure out why. import java.util.List; import java.util.Arr...java.lang.IllegalAccessError: class org.apache.spark.storage.StorageUtils$ (in unnamed module @0x12a94400) cannot access class sun.nio.ch.DirectBuffer (in module java.base) because module java.base does not export sun.nio.ch to unnamed moduleMay 13, 2022 · java.lang.IllegalAccessError: class org.apache.spark.storage.StorageUtils$ (in unnamed module @0x12a94400) cannot access class sun.nio.ch.DirectBuffer (in module java.base) because module java.base does not export sun.nio.ch to unnamed module This is another common reason for java.lang.NoClassDefFoundError, when your class performs some static initialization in a static block like many Singleton classes initialized itself on the static block to take advantage of thread-safety provided by JVM during the class initialization process, and if static block throws an Exception, the class ...Feb 15, 2011 · This is a missing jars in the class path issue. I had this issue and found that with by adding the missing jars to the class path it resolved the issue. From the below article java.dzone.com article I found that the minimal jars necessary are...Now The versions numbers have changed but with these libraries only I managed to get it working. This is another common reason for java.lang.NoClassDefFoundError, when your class performs some static initialization in a static block like many Singleton classes initialized itself on the static block to take advantage of thread-safety provided by JVM during the class initialization process, and if static block throws an Exception, the class ... Could not initialize class com.sun.xml.internal.ws.fault.SOAPFaultBuilder java.lang.NoClassDefFoundError: Could not initialize class com.sun.xml.internal.ws.fault.SOAPFaultBuilder And my understanding was our client received a SOAP Fault from the server and it's missing some jar file.Assuming by 'standard' you both mean Oracle, there is no difference in JSSE between Oracle and OpenJDK (and no difference in the rest of JCE except that in versions before late 2017 Oracle defaulted to the 'limited' crypto policy due to former US export rules, and you needed to add the 'unlimited policy' download, while OpenJDK ddi not).Jasperreport in Java 11. java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser Hot Network Questions Removing certain elements from a list of lists1 Usually it is caused by class conflict. There is multiple version of the jar used in your project,and java picked the incorrect one. You can check which version is really in dependency hierarchy by passing the artifactId.java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7 I don't understand why this happens because I'm not even using Gradle! I'm using Maven as in any of my Spring Boot Projects but this problem only happens whenever I add the Spring Data Cassandra Dependency.Oct 4, 2018 · If this specific jar doesn't suit you, there are a few others where chis class could be found. If you use Eclipse, there is a handy tool that allows you to see what jars contain the class you need, and this way you can see what makes most sense given what you are doing. Under Mac, you can press CMD+Shift+T and enter the class name. Hope this helps. Nov 9, 2022 · What Is java.lang.NoClassDefFoundError? When the Java Runtime runs a Java program, it does not load all the classes and dependencies at once. Instead, it calls upon the Java Classloader to load classes in memory as-and-when-required. While loading a class, if the Classloader cannot find the class’s definition, it throws the NoClassDefFoundError. I had this issue when working on a spring-boot application. The problem was caused by hibernate-validator 6.0.11 which seems to have an erroneous dependency on javax validation-api 2.0.1.Final.37.1k 15 99 111 asked Sep 6, 2011 at 20:12 Leon 8,151 11 45 51 Is the appropriate directory structure in your jar to match the class package? – John B Sep 6, 2011 at 20:14 need to see some source, many things can cause this. for example, a 'package' statement but the file not actually residing in the corresponding path – jcomeau_ictx.

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