Jan 26, 2016 · Could not initialize class io.jsonwebtoken.SignatureAlgorithm , java.lang.NoClassDefFoundError, 0 HTTP Status 500 - Handler processing failed; nested exception is java.lang.UnsatisfiedLinkError: The specified module could not be found Mar 14, 2018 · java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDFont. For other file extensions it works fine. Things I have tried out dependencies in apache-tika module.xml to PDFbox Explicitly loaded org.apache.pdfbox from standalone.xml I am getting this exception java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.vmplugin.v7.Java7 and java.lang.NoClassDefFoundError: Could not initialize class org.codehaus.groovy.reflection.ReflectionCache) when i run the spring boot application. I am using below toolsIf 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. –Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsGetting java.lang.NoClassDefFoundError: Could not initialize class oracle.jdbc.OracleDriver exception Hot Network Questions Why did 1990s-2000s LCD all use 60 Hz refresh?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.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 ..."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"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.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 ...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?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: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. –Mar 14, 2018 · java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDFont. For other file extensions it works fine. Things I have tried out dependencies in apache-tika module.xml to PDFbox Explicitly loaded org.apache.pdfbox from standalone.xml 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. 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: when i open apache-jmeter-3.1 and right click the test-plan button,it turns out to be no response and throws lists of errors in the jmeter.log as follows 2016/12/17 16:24:30 ERROR - jmeter.JMeter: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 ... 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 ... 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. 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" 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.DBhelper1 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.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: 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 Mar 16, 2017 · 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... 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. 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 moduleOct 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. 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 importThe setting you showed above doesn’t exist. It’s likely some sort of bug that Lucee is showing a number greater than 115% but unless you’re actually getting memory errors in your app I wouldn’t worry. That said, your app might breath a bit better if you give it more than 512MB, assuming you have it available.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 importJul 7, 2021 · 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. 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.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 ... 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. 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 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 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.PhysicalFontwhen i open apache-jmeter-3.1 and right click the test-plan button,it turns out to be no response and throws lists of errors in the jmeter.log as follows 2016/12/17 16:24:30 ERROR - jmeter.JMeter: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 importThanks 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.Aug 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). 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.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 resolvedThe setting you showed above doesn’t exist. It’s likely some sort of bug that Lucee is showing a number greater than 115% but unless you’re actually getting memory errors in your app I wouldn’t worry. That said, your app might breath a bit better if you give it more than 512MB, assuming you have it available.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): 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 [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.Java.Lang.NoClassDefFoundError: Could Not Initialize Class エラーを根絶するためのソリューション 今日は、別の実行時エラーについて学習します: java.lang.noclassdeffounderror: could not initialize class. まず、このエラーが発生した Java プログラムを調べて、考えられる理由につい ...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 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...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: 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.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 [ 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 ...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. 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 26, 2016 · Could not initialize class io.jsonwebtoken.SignatureAlgorithm , java.lang.NoClassDefFoundError, 0 HTTP Status 500 - Handler processing failed; nested exception is java.lang.UnsatisfiedLinkError: The specified module could not be found 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.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_ictxThe setting you showed above doesn’t exist. It’s likely some sort of bug that Lucee is showing a number greater than 115% but unless you’re actually getting memory errors in your app I wouldn’t worry. That said, your app might breath a bit better if you give it more than 512MB, assuming you have it available.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 ... 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 –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.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.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: Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsDec 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): 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. 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 ... 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? 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."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"Aug 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). 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.Jan 26, 2016 · Could not initialize class io.jsonwebtoken.SignatureAlgorithm , java.lang.NoClassDefFoundError, 0 HTTP Status 500 - Handler processing failed; nested exception is java.lang.UnsatisfiedLinkError: The specified module could not be found 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. 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.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: Mar 14, 2018 · java.lang.NoClassDefFoundError: Could not initialize class org.apache.pdfbox.pdmodel.font.PDFont. For other file extensions it works fine. Things I have tried out dependencies in apache-tika module.xml to PDFbox Explicitly loaded org.apache.pdfbox from standalone.xml 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 ...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 it
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 ... . Spider man cosplay porn
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. 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. 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 ...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 26, 2016 · Could not initialize class io.jsonwebtoken.SignatureAlgorithm , java.lang.NoClassDefFoundError, 0 HTTP Status 500 - Handler processing failed; nested exception is java.lang.UnsatisfiedLinkError: The specified module could not be found 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... 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...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 1.5.6What 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.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.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...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...Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teamsjava.lang.NoClassDefFoundError: Could not initialize class org.jetbrains.kotlin.com.intellij.pom.java.LanguageLevel 5 Difficulties enabling Kotlin in React Native Expo with Bare WorkflowJul 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 ... 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 2.12.1 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.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.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.