Develop Reference

ClassCastException on JAXBContext after upgrading to Java 11

After upgrading to Java 11 my PDF generation stop working (using Apache FOP) with the following error.
Caused by: jakarta.xml.bind.JAXBException: ClassCastException: attempting to cast
jar:file:jakarta.xml.bind-api-3.0.0.jar!/jakarta/xml/bind/JAXBContext.class to
jar:file:jakarta.xml.bind-api-3.0.0.jar!/jakarta/xml/bind/JAXBContext.class.
Please make sure that you are specifying the proper ClassLoader.
Which make no sense at all since it's the same file. Previous problems solved migrating to jakarta but this remains.

Adding the following dependency solves de issue
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>3.0.0</version>
</dependency>

Exception in thread "main" java.lang.NoClassDefFoundError Could not initialize class org.bytedeco.javacpp.avutil

I have a java application that uses bytedeco/javacv library.
but when I run the application, I am getting the following exception.
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.javacpp.avutil
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.bytedeco.javacpp.Loader.load(Loader.java:386)
at org.bytedeco.javacpp.Loader.load(Loader.java:354)
at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2719)
at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:391)
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:385)
at com.diyoron.ai.examples.VideoFrameProccessor.main(VideoFrameProccessor.java:38)
Error getting static method ID of org/bytedeco/javacpp/Loader/putMemberOffset
The code is as following,
String videoPath = video.getAbsolutePath();
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(videoPath);
grabber.start();
According to this following statement in the README.MD
Additionally, we need to either set the javacpp.platform system
property (via the -D command line option) to something like
android-arm, or set the javacpp.platform.dependencies one to true to
get all the binaries for Android, Linux, Mac OS X, and Windows. On
build systems where this does not work, we need to add the
platform-specific artifacts manually. For examples with Gradle and
sbt, please refer to the README.md file of the JavaCPP Presets.
Another option available for Scala users is sbt-javacv.
~ Reference GitHub.
I added argument -Djavacpp.platform.dependencies="true", But still I am getting the exception. I am not sure what is causing this issue, I have very less experience in working with c++ wrappers.
PS: I have not installed any c++ dependencies/libraries or open-cv in my machine.
And all the solutions are related to Android and I haven't had much luck following those in my java related application.

Adding the following dependencies resolved the issue.
<!-- http://mvnrepository.com/artifact/org.bytedeco/javacv -->
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>1.2</version>
</dependency>
<!-- http://mvnrepository.com/artifact/org.bytedeco/javacpp -->
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacpp</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>opencv</artifactId>
<version>3.1.0-1.2</version>
</dependency>
<dependency>
<groupId>org.bytedeco.javacpp-presets</groupId>
<artifactId>ffmpeg</artifactId>
<version>3.0.2-1.2</version>
</dependency>

Way Too Many Maven Dependencies

I've been trying to setup the simplest of simple hibernate applications and for reasons beyond my mediocre way of thinking I cannot get it running. Maven is easy enough - adding dependencies to the build path, updating the project, blah blah blah yadda yadda yadda
It started off as a single ClassNotFoundException which required a missing dependency. I would import the missing jar and run the app again, only to get another ClassNotFoundException. Next thing I know I HAVE A TON OF JARS AND NO WORKING APPLICATION
*Directories have been masked to protect the unfortunate
I've used both Maven and Hibernate in my last project in Eclipse Kepler and it was almost too easy, ha! Updating to Luna was a real pain trying to get Maven to run correctly - disabling the Java Compilier Compliance Level just to be able to update the Dynamic Web Module, not to mention manually creating the missing src/main/java and src/test/java folders that are standard with a maven-archetype-webapp, the list goes on. I've spent tooooo much time just to get the thing to not fail.
In my last project all I needed to import was:
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>4.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
That' was it! I was swimming in Session Factories and Updating database tables like it was my job (it is).
This leads me to believe some core functionality is missing from this new project. Perhaps I've overlooked something in the IDE Upgrade. Could almost guarantee its my Build Path. Please Help!
About my project - I'm using:
Eclipse Luna (Kepler was 100x easier to setup with Maven)
Maven Webapp Archetype
JDK-1.7
Hibernate Core 4-3.6
My latest Exception was
Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/NamedStoredProcedureQuery
at org.hibernate.cfg.AnnotationBinder.bindDefaults(AnnotationBinder.java:276)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1402)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1844)
at com.boa.ecris.test.Main.main(Main.java:22)
Caused by: java.lang.ClassNotFoundException: javax.persistence.NamedStoredProcedureQuery
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 4 more
If this is specific to the javax persistence-api.jar, it's already in there!!!

Java APIs change over time. You need to find the correct version of your dependency (namely the one which contains the version of the API which you want/need to use). Since you told Maven to use version 1.0.2 of persistance-api, that's what Maven will do - you might know better.
If the error doesn't go away, then your next step should be the Maven central repo, specifically the "find class for me" search dialog: http://search.maven.org/#search%7Cga%7C1%7Cfc%3Ajavax.persistence.NamedStoredProcedureQuery
Next, you need to understand which dependencies you want in your project and select the correct one from the list. Since Maven doesn't know about your constraints, that is something you have to figure out yourself.
A word of wisdom: A computer doesn't have a brain, bring your own.

When you have ClassNotFoundException, first of all you have to look at your repository site. You can get maven repository url from settings file in .m2 folder. Then you can search your dependency at that site with your artifact id and version. If your version is not there, you can see some other version and put it instead yours. So you can provide stability at your project without manual adding.

Luna can create the maven project hierarchy too. On the New maven project dialog check the Create a simple project (skip archetype selection) checkbox.

ClassNotFoundException HttpRequestInterceptor

I am getting this weird exception on this line:
HttpSolrServer server = new HttpSolrServer("http://localhost:8080/solr/");
Stack trace:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/HttpRequestInterceptor
at com.polgar.dipl.index.SolrIndex.init(SolrIndex.java:36)
at com.polgar.dipl.index.SolrIndex.getInstance(SolrIndex.java:30)
at com.polgar.dipl.main.ArticleIndexer.main(ArticleIndexer.java:44)
Caused by: java.lang.ClassNotFoundException: org.apache.http.HttpRequestInterceptor
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 3 more

Getting the same problem. We both must be playing with Solr 3.6
I had to download the HttpClient jars from the HttpComponents project. They didn't seem to be included with Solr 3.6
http://hc.apache.org/downloads.cgi
3.6 Has a new version of the client that uses the new HttpComponents (4.0) stuff, not the old HttpClient (3.1) stuff. The old 3.1 jar is there, but not the new one.
Once I copied the jars over, it worked.
I copied the following (not all may be needed).
httpclient-4.1.3.jar
httpclient-cache-4.1.3.jar
httpcore-4.1.4.jar
httpmime-4.1.3.jar
works for me, now.

If you are using Maven to include SOLRJ, you'll also want the following phrases in your POM:
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.2.1</version>
</dependency>

Looks like you are missing the HttpClient Jar file in your runtime classpath.

I was also facing this issue. To resolve this, I have done following:
Checked the versions available of http components in your "~.m2\repository\org\apache\httpcomponents" directory
Based on that add following entries in your pom.xml file and rebuild your project by running mvn clean install and mvn eclipse:eclipse command one by one.
(If you are behind the proxy, make sure you have provided essential configuration in your settings.xml file)
This should resolve the problem, It did for me. :)
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.2.3</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.2.3</version>
</dependency>

Does JAXB work under Java 5?

Building with maven I get "package javax.xml.bind.annotation does not exist"
What do I need to make JAXB work with Java 5?

JAXB APIs are bundled in JDK1.6, but these are not available in JDK <1.6 (ex: JDK1.5).
I have a Java to XML code written in JDK1.6 and once I switched to JDK1.5, I got the following error:
*Exception in thread "main" java.lang.RuntimeException: javax.xml.bind.JAXBException
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]
...
Caused by: javax.xml.bind.JAXBException
- with linked exception:
[java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory]*
...
JDK1.5 doesnt contain the JAXB APIs and therefore I applied the following fix:
I used JDK1.5 and the following two JARS: jaxb-api-2.0.jar and jaxb-impl-2.0.jar in my classpath and the error was resolved.
I hope this helps.
Another Reference: http://www.mkyong.com/java/jaxb-hello-world-example/

You can download the reference implementation (RI) from http://jaxb.dev.java.net/.
I can't advise you on how to make it work with maven though - more trouble than it's worth, if you ask me.
Java6 included a slightly modified version of the RI, but the RI itself works just fine with Java5.

Using the following versions will work with JDK5:
<!--
versions after 2.2.4 requires jdk6, please refer
to https://java.net/jira/browse/JAXB-890
-->
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.2.4-1</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>javax.xml.soap</groupId>
<artifactId>saaj-api</artifactId>
<version>1.3.3</version>
</dependency>

It seems there are many versions and differing paths to get JAXB from a maven repository.
My best guess for the correct artifact is javax.xml.bind:jaxb-api:2.2
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2</version>
<scope>compile</scope>
</dependency>

Jaxb should work with Java 5 but it seems that there are more people having issues with it.
Could it be that are missing some jars?
Check out this forum post.