how to resolve HTTP Status 500: java.lang.NoClassDefFoundError [duplicate] - java

This question already has an answer here:
Jira Rest Java Client: missing ApacheHttpClientConfig from Jersey
(1 answer)
Closed 8 years ago.
When i use library(com.sun.jersey.client.apache.config.DefaultApacheHttpClientConfig or another ) returns status 500 with massage
"java.lang.NoClassDefFoundError:
com/sun/jersey/client/apache/config/DefaultApacheHttpClientConfig...",
which means that program don't see this library at runtime(program is a jira plugin which runs on localhost). How i can add this library dynamically to runtime, cause when i build classes at my PC its OK. I tried to configure pom.xml and atlassian-plugin.xml files.

Download the jersey-apache-client.jar with all the dependencies and add it to your classpath.

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Could not get resource firebase-measurement-connector-impl-17.0.5-javadoc.jar [duplicate]

This question already has answers here:
Could not get resource 'http://...firebase-measurement-connector-impl-17.0.5-javadoc.jar
(3 answers)
Closed 4 years ago.
I was trying to built my android application, but build failed because of this error:
org.gradle.api.resources.ResourceException: Could not get resource 'https://dl.google.com/dl/android/maven2/com/google/firebase/firebase-measurement-connector-impl/17.0.5/firebase-measurement-connector-impl-17.0.5-javadoc.jar'.
Any support to fix this will be really appreciated.
fixed it by upgrading the Gradle distribution to 5.x. Go to gradle-wrapper.properties and update:
distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
This question might be a duplicate of:
Could not get resource 'http://...firebase-measurement-connector-impl-17.0.5-javadoc.jar

Error in working with jdbc [duplicate]

This question already has answers here:
Connect Java to a MySQL database
(14 answers)
Closed 4 years ago.
I'm getting an error at runtime saying that: could not load com.mysql.jdbc.driver
But when I'm setting the classpath then at run time I'm getting an error as could not load main class even though I had set up path in advance setting.
What should I do?
I had this problem recently and had to add the mysql-connector-java-8.0.11.jar to my library. https://mvnrepository.com/artifact/mysql/mysql-connector-java/8.0.11 If you're using maven you can just add it in or else download the jar file.
com.mysql.jdbc.Driver with a capital D. Also Class.forName no longer is needed; the jdbc:mysql: URL suffices.

Getting this error: 'Building Workspace' has encountered an error. Errors occurred during the build [duplicate]

This question already has answers here:
'Building workspace' has encountered an error
(8 answers)
Closed 5 years ago.
Im using eclipse neon with maven 3.5.0.
Anytime I make some changes to the pom file and try saving it, it throws me this error. I am unable to fix it and hence unable to proceed ahead in my project.
I found a fix here: https://github.com/SeleniumHQ/selenium/issues/3895
The problem is the empty file selenium-java-3.4.0-javadoc in the javadoc file. Java cannot handle such entries currently (fixed for JDK9): https://bugs.openjdk.java.net/browse/JDK-8048990
The empty file should be removed from the javadoc file.

Building workspace(sleeping) [duplicate]

This question already has answers here:
java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$styleable
(5 answers)
Closed 5 years ago.
I have added android-support-v7-appcompat library to my project I got this error:
"java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$styleable "
then I right clicked on the android-support-v7-appcompat and unchecked "Dependency"
when I run my project, in progress bar I see
Building workspace(Sleeping)
Ok
then it gets cleaned and then the same message will be giving.
I can't upload the print screen
any ideas please
It seems that your ide do not generate R.java properly, or your dependency setting may be wrong. Recheck that you've followed the instruction in this page https://developer.android.com/tools/support-library/setup.html
I'm not familiar with eclipse. If you're sure you have the dependency work done, maybe you can try something like "clean" and then "rebuild".

http 404 error on eclipse [duplicate]

This question already has answers here:
HTTP Status 404 - The requested resource (/ProjectName/) is not available
(3 answers)
Closed 6 years ago.
I have found several replicas of this question, but none helped me.
I was dealing with jsp and hibernet with eclipse and apache server.
The server installation is in port 9090. An downloaded project has imported from D:/.
After clearing the jre path, I Run the project on server and the out put is error
`HTTP Status 404 - /servlet/
type Status report
message /servlet/
description The requested resource is not available.
Apache Tomcat/7.0.32`
The google search gave some remedies and I followed that. The following are the screen shots.
Project:
Server Properties:
Tomcat Overview:
Did I missed anything?
I solved the issue. I had made some mistakes
1. I have failed to include the welcome page in web.xml
2. I had put the project in eclipse workspace and I choose the server location as Use tomcat installation. That was wrong. I should choose workspace meta data as my project is in workspace
Below steps solves 404 problem if server is properly configured.
First:
Check your Context root for this project.
You can edit context root from project-->property->web project settings.
Second:
Restart your server and try to clean and build again. Sometimes that solves 404 problem.
Third:
1) Double click on your server or right click->open
2) Click on open launch configuration
3) Go to classpath tab
4) See in user-entries, commons-daemon.jar is available or not if it not then click on add external jar --> path(which you can find it in TOMCAT_HOME/bin)
5) Click on apply and restart your server
Now access : http://localhost:9090/<project-context-root>

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