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Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet

I am using eclipse neon.3 version and tomcat 8.5.15,I tried to execute simple hello world program using spring mvc but I am getting this issue=>
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet.
It happened only with spring mvc projects,rather than spring mvc,other codes executed successfully. Also mentioned the jar files which I have uploaded.
Please help me.

There is no javax.servlet-api.jar in the classpath. Maybe it is not in tomcat's lib folder.
Try to add this jar to your WEB-INF/lib directory. To download a jar go to https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api/3.1.0

I had the same problem when I first tried to use Tomcat. If you imported HttpServlet class from jakarta.servlet.http try importing it from javax.servlet.http instead, that's what worked for me. Since I used jakarta-servlet-api dependency I expected to find the HttpServlet class in the javax.servlet.http package, however I was wrong.
I extracted the jakarta-servlet-api.jar and saw that the package is called javax.
So I imported HttpServlet from javax.servlet.http instead and it worked fine.

NoClassDefFoundError for com.sun.xml.internal.ws.fault.SOAPFaultBuilder

Our web service client in live environment recently got the exception:
java.lang.NoClassDefFoundError: Could not initialize class com.sun.xml.internal.ws.fault.SOAPFaultBuilder
at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:107)
at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78)
at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:135)
at com.sun.proxy.$Proxy146.search(Unknown Source)
....
I've done a lot of search online, including a few posts here at StackOverflow:
Catching webservice exception with CXF: NoClassDefFoundError: SOAPFaultBuilder
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. So I'm trying to solve the problem by first recreating it.
I created a simple Web Service server project in Eclipse which has a web method throws a simple fault class annotated by #WebFault. Then I created a simple Web Service client project which consumes the web method. The client project doesn't have any additional libraries/jars in its classpath; all it has is the JRE. To my surprise, it didn't throw the NoClassDefFoundError exception! Instead, I got the javax.xml.ws.soap.SOAPFaultException I defined on the server side.
The class SOAPFaultBuilder is indeed in rt.jar in JRE. So the simple web service projects I created probably just work as they should. However, how come the web service client in our live environment throw the NoClassDefFoundError exception? That project definitely has rt.jar in the classpath.
Can anyone please shed some light on this problem? If it's missing some jar files (either from the jaxws RI or Apache CXF or others), why would the super simple client I created didn't throw the error? Both the live environment and my local environment use Java7u51.

I have encountered the same problem and I could subsequently resolve this.
Due to the following error mentioned in the Problem, the underlying cause of the SOAP Fault could not be found.
I followed the steps mentioned in the following link, to identify the reason for NoClassDefFoundError.
http://javarevisited.blogspot.in/2011/06/noclassdeffounderror-exception-in.html
I could find the following errors in my application log:
java.lang.ExceptionInInitializerError
Caused by: java.lang.ClassCastException: com.sun.xml.bind.v2.runtime.JAXBContextImpl cannot be cast to com.sun.xml.internal.bind.api.JAXBRIContext
The reason for the above classcast exception is due to conflicting jar files.
rt.jar (this is present in jre classpath)
jaxb-impl-2.0.1.jar (this is present in my application classpath).
I have removed the file jaxb-impl-2.0.1.jar from my classpath and the actual error is gone.

I had the same erorr and I resolved this issue by deleting the jax-impl.jar from the tomcat lib folder. It was a possible conflict of the jaxb jar versions with one of my webapps installed in tomcat.
http://programtalk.com/java/i-was-running-gwt-application-on-tomca/

Where to add the jdbc driver on Netbeans/Glassfish in Windows?

I have an enterprise app created in Netbeans 6.8 which comes packaged with a Glassfish V3 server. I've been receiving the following exception from the server log when I try to deploy and run the EAR project:
SEVERE: jdbc.exc_cnfe_ds
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
From googling, the common solution to this is to copy the jar file (mysql-connector-java-5.1.6-bin.jar) containing that class to
$glassfish-v3-install-root/glassfish/domains/domain1/lib.
and in fact that's where it resides on the Unix server. However, I'm testing this on windows and the "domains/domain1" directories don't exist in the default glassfish install. I added them manually and added the jar, but it made no difference. I also added the jar as a variable to the windows classpath, but that also had no effect.
I then tried adding the jar file $glassfish-v3-install-root/glassfish/lib, and that produced a different error:
SEVERE: RAR5111 : Error casting to javax.sql.Datasource
java.lang.ClassCastException: com.mysql.jdbc.Driver cannot be cast to javax.sql.DataSource
I'm using the same jar file as exists for the server. I'm guessing the jar is misplaced? I don't want to put it in the project because that's not how it's deployed in production. Any help appreciated.

Putting the jar file in $glassfish-v3-install-root/glassfish/lib turned out to be correct.
The
"SEVERE: RAR5111 : Error casting to javax.sql.Datasource java.lang.ClassCastException: com.mysql.jdbc.Driver cannot be cast to javax.sql.DataSource"
error was, I believe, caused by an incorrect setting for the jdbc pooling on the glassfish server. But going to the admin console, available from the Netbeans "server" tab, going to the "JDBC", "Connection Pools", select "java.sql.driver" as the resource type and "com.mysql.jdbc.driver" as the driver classname will get rid of the casting issue.
Click the "Ping" button near the top to make sure you're connecting.

Axis2 WS consumer in WebMethods8.2

I've got into a scenario where I have to get an Axis2 based ws consumer working within WebMethods as a java service. I've implemented the ws consumer first in netbeans just to see if it works and thus i found that the minimal amount of jars I'll require are the following:
[ xmlschema-1.4.7.jar, apache-mime4j-core-0.7.2.jar,
axiom-api-1.2.13.jar, axiom-impl-1.2.13.jar, axis2-adb-1.6.2.jar,
axis2-kernel-1.6.2.jar, axis2-transport-http-1.6.2.jar,
axis2-transport-local-1.6.2.jar, commons-codec-1.3.jar,
commons-httpclient-3.1.jar, commons-logging-1.1.1.jar,
httpcore-4.0.jar, mail-1.4.jar, neethi-3.0.2.jar, wsdl4j-1.6.2.jar ]
I've uploaded these jar files under the IS/packages/{package_name}/code/jars folder. Whenever I try to execute the java service that would send the request and process the response I get the following exception:
java.lang.reflect.InvocationTargetException:
org.apache.axiom.om.OMFactory.getMetaFactory()Lorg/apache/axiom/om/OMMetaFactory;
From the IS error log file I found that the actual error message is as follows:
org.apache.axiom.om.OMFactory.getMetaFactory()Lorg/apache/axiom/om/OMMetaFactory;
Caused by: java.lang.reflect.InvocationTargetException: null Caused
by:
java.lang.NoSuchMethodError:org.apache.axiom.om.OMFactory.getMetaFactory()Lorg/apache/axiom/om/OMMetaFactory;
The platform is WebMethods 8.2 under Linux environment. The JDK version is 1.6.0_32 and the application server under WebMethods is Jetty.

Actually the solve of this problem was a bit more tricky. First of all I manually had to configure the manifest file of the package on the IS server to use the jars provided in the package abnd thus it wouldn't get in conflict with the Axis used by the IS itself. On the other hand I had to manually add the ClassLoader because WebMethods can't use META-INF based information from jar files as it seems. To solve this problem simply use:
System.setProperty("org.apache.axiom.om.OMMetaFactory", "org.apache.axiom.om.impl.llom.factory.OMLinkedListMetaFactory");
That solves all the problems.

<HTTP> <BEA-101163> <Could not load user defined listener:

I have modified an EAR for Weblogic 10 ( BEA 10 )which is already running on BEA 8..
I am getting the following error while deploying the EAR..
[HTTP:101163]Could not load user defined listener: com.xxx.xxxx.jmx.LifecycleListener java.lang.NoClassDefFoundError: com/tibco/sdk/MException at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357) at java.lang.Class.getConstructor0(Class.java:2671) at java.lang.Class.newInstance0(Class.java:321) at java.lang.Class.newInstance(Class.java:303) at weblogic.servlet.internal.WebComponentContributor.getNewInstance(WebComponentContributor.java:187) at weblogic.servlet.internal.WebComponentContributor.createListenerInstance
Have you faced this error ?Please help me...

From the Exception it seems that some library is missing from your ear file. Make sure that com.xxx.xxxx.jmx.LifecycleListener is a valid package and included correctly in your ear.
If you are developing and building the ear with JDeveloper make sure you add this lib in your application resources. If you do this manualy make sure that this lib exists in your WEB-INF/lib folder