Java.lang.noclassdeffounderror could not initialize class - Jul 2, 2021 · when we migrated from Oracle JDK-8 to Open JDK-11, Apache POI excel generation has issues tried already -Djava.awt.headless=true org.springframework.web.util.NestedServletException: Handler dispatch

 
Nov 1, 2020 · Today, I updated it and everything went downhill. I've been having different errors throughout my attempt to fix this. First error: could not initialize class org.codehaus.groovy.runtime.invokerhelper. Second error: could not initialize class org.codehaus.groovy.reflection.ReflectionCache. Anyways, I've been researching and I've done the following. . The return of the disaster class hero manga

Dec 15, 2018 · 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? 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.Apr 26, 2017 · 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 = ... 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 Jul 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. 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). Apr 4, 2021 · 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 Workflow 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 importI am writing a plugin for nexus oss . where I am using axis for making webservice calls . It throws an. InvocationTargetException : target : java.lang.NoClassDefFoundError: Could not initialize class org.apache.axis.client.AxisClientThe root cause of the issue is correct - missed "Microsoft Visual C++ Redistributable" but I haven't had installed exact version - "Microsoft Visual C++ 2015 Redistributable х64", and the similar environment works well without errors.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 Jul 2, 2021 · when we migrated from Oracle JDK-8 to Open JDK-11, Apache POI excel generation has issues tried already -Djava.awt.headless=true org.springframework.web.util.NestedServletException: Handler dispatch 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 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. Apr 20, 2020 · Could not initialize class org.codehaus.groovy.runtime.InvokerHelper. In a similar question in stack-overflow Android Studio Could not initialize class org.codehaus.groovy.runtime.InvokerHelper it was recommended to . install java jdk-14 ; upgrade to gradle version 6.3; I changed the jdk to 14 in IntelliJ in 2 places: 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.4 Answers Sorted by: 6 Generally, this kind of issue happens when there is an uncaught exception inside your singleton object. Try putting a try catch clause inside to get the origin of your error. ShareIf you are using Java 8 Update 151 (8u151) or later, also check this:. New Features New Security property to control crypto policy. This release introduces a new feature whereby the JCE jurisdiction policy files used by the JDK can be controlled via a new Security property.2 Answers Sorted by: 1 This is an old question, but I think it deserves a better answer. There are actually two things going on here. Some time before the exception that the Question is talking about, the JVM has attempted to execute the static initialization for the AccessorFactory class. 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... I'm trying to run tests in a legacy Java project and I get this error: java.lang.NoClassDefFoundError: Could not initialize class org.powermock.modules.junit4.rule.PowerMockRule The code that is causing the issue is like that: @Rule public PowerMockRule rule = new PowerMockRule(); And the PowerMock version is 1.5.6Could 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 ...The ClientConfiguration of aws-java-sdk-osgi-1.11.26.jar is dependent of Jackson-databind.jar Jackson-databind.jar is dependent on Jackson-core.jar So it is not able to initialize ClientConfiguration. Added Import-Package importing all from jackson-core-osgi.jar in Manifest of Jackson-databind-osgi.jar. Then the issue is resolvedI 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.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. hibernate -annotation.jar and hibernate-common-annotation.jar are different? i included hibernate-common-annotation.jar but i still getting java.lang.NoClassDefFoundError: Could not initialize class org.hibernate.ejb.Ejb3Configuration. i am using hibernate with jpa specification –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: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. 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. [Solved] java.lang.NoClassDefFoundError: Could not initialize class org.hibernate.validator.engine.ConfigurationImpl37.1k 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_ictxYou'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 ...Dec 15, 2014 · This seems to be caused by Ubuntu using the non no_aop version of guice.jar in maven 3.6.3 (which needs the no_aop guice.jar). As a workaround in Ubuntu you could (if you don't care breaking some other ubuntu package actually needing the non no_aop jar): 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: 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.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 importAug 1, 2022 · 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). For this problem not very clear why occur. in order to fix the problem. we can manual use Security.addSecurity method to load jca or analogous component again. like BouncyCastle. now it work fine for me.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...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.As you may see first exception that we have NPE at (Plugins.java:17) and I think it's somehow connected with ClassLoaders. I can get same issue for jUnit module also. I can get same issue for jUnit module also. Mar 8, 2020 · I'm trying to run tests in a legacy Java project and I get this error: java.lang.NoClassDefFoundError: Could not initialize class org.powermock.modules.junit4.rule.PowerMockRule The code that is causing the issue is like that: @Rule public PowerMockRule rule = new PowerMockRule(); And the PowerMock version is 1.5.6 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?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.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 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 ... Jul 2, 2021 · when we migrated from Oracle JDK-8 to Open JDK-11, Apache POI excel generation has issues tried already -Djava.awt.headless=true org.springframework.web.util.NestedServletException: Handler dispatch 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 ...Nov 28, 2017 · Seems like you are missing a class on your CLASSPATH.That may be caused by various issues, you have to make sure org.owasp.esapi.reference.DefaultValidator is found by the server's CLASSPATH. 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 the latter though you'll need to include a Constructor to your ...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.May 8, 2019 · 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. 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_ictxMay 2, 2011 · The message Could not initialize class org.hibernate.cfg.Configuration means that the JVM has already tried and failed to initialize the class org.hibernate.cfg.Configuration. The source code of the class contains the following line: Since this field is marked static, the field's value is set when the class has initialized. 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 am writing a plugin for nexus oss . where I am using axis for making webservice calls . It throws an. InvocationTargetException : target : java.lang.NoClassDefFoundError: Could not initialize class org.apache.axis.client.AxisClientSep 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 [ 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. Jul 2, 2021 · when we migrated from Oracle JDK-8 to Open JDK-11, Apache POI excel generation has issues tried already -Djava.awt.headless=true org.springframework.web.util.NestedServletException: Handler dispatch 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 ... This is my hibernate util code public class HibernateUtil { private static final SessionFactory sessionFactory = buildSessionFactory(); private static SessionFactory buildSessionFactory() { ...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.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?Same 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.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 listsJan 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). May 8, 2019 · 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. Could not initialize class sun.awt.X11FontManager using openjdk 8 on alpine linux 6 OpenJDK 11 java.lang.ClassCastException: class sun.font.CompositeFont cannot be cast to class sun.font.PhysicalFontWhile 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...Oct 14, 2015 · After wasting almost one day and finding that the jar is already on my class path, i further debugged it and found that when java's reflection mechanism was trying to find a method which was already present in the "methods list" it was not able to find due to some version conflict between Jedis version (2.7.2) not compatible with Spring Data Redis (1.5.0.RELEASE), this issue has already been ... 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 importApr 4, 2021 · 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 Workflow Could not initialize class .....javax.xml.transform.FactoryFinder (in our case). In the article, where we found the solution, it was the class SessionFactory. Class Under Test. We wanted to write a test for a utils class with static members. 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?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.The ClientConfiguration of aws-java-sdk-osgi-1.11.26.jar is dependent of Jackson-databind.jar Jackson-databind.jar is dependent on Jackson-core.jar So it is not able to initialize ClientConfiguration. Added Import-Package importing all from jackson-core-osgi.jar in Manifest of Jackson-databind-osgi.jar. Then the issue is resolvedI 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 [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... 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.1 Answer. Sorted by: 1. It is happening because your variable is static and within consutructir you are trying to change the variable. It will attempt to reinitialize which is not possible . Share. Follow.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.The root cause of the issue is correct - missed "Microsoft Visual C++ Redistributable" but I haven't had installed exact version - "Microsoft Visual C++ 2015 Redistributable х64", and the similar environment works well without errors.2 Answers Sorted by: 1 This is an old question, but I think it deserves a better answer. There are actually two things going on here. Some time before the exception that the Question is talking about, the JVM has attempted to execute the static initialization for the AccessorFactory class.Oct 29, 2021 · 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. Dec 15, 2014 · This seems to be caused by Ubuntu using the non no_aop version of guice.jar in maven 3.6.3 (which needs the no_aop guice.jar). As a workaround in Ubuntu you could (if you don't care breaking some other ubuntu package actually needing the non no_aop jar): Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsJul 2, 2021 · when we migrated from Oracle JDK-8 to Open JDK-11, Apache POI excel generation has issues tried already -Djava.awt.headless=true org.springframework.web.util.NestedServletException: Handler dispatch 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).

2 Answers Sorted by: 1 This is an old question, but I think it deserves a better answer. There are actually two things going on here. Some time before the exception that the Question is talking about, the JVM has attempted to execute the static initialization for the AccessorFactory class.. Mature anal

java.lang.noclassdeffounderror could not initialize class

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).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.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. 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... Seems like you are missing a class on your CLASSPATH.That may be caused by various issues, you have to make sure org.owasp.esapi.reference.DefaultValidator is found by the server's CLASSPATH.I keep getting java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser The full stacktrace is: java.lang ...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).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.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 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.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.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. Oct 1, 2022 · If you are working on spring MVC web application and you are trying to use JSR-303 validation annotations then you might face this exception. Exception stack trace looks like this. Apr 4, 2021 · 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 Workflow Jan 21, 2022 · If 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. – 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.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 ...After wasting almost one day and finding that the jar is already on my class path, i further debugged it and found that when java's reflection mechanism was trying to find a method which was already present in the "methods list" it was not able to find due to some version conflict between Jedis version (2.7.2) not compatible with Spring Data Redis (1.5.0.RELEASE), this issue has already been ....

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