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IncompatibleClassChangeError while deploying to eclipse tomcat 9

I am trying to build a RESTfull service for excel type file download service. But when I try to deploy it to tomcat 9. I am getting the error of IncompatibleClassChangeError
The stacktrace is as followed : -
SEVERE: StandardWrapper.Throwable
java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2267)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:803)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1244)
And my pom.xml is
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>com.datastax.cassandra</groupId>
<artifactId>cassandra-driver-core</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
</dependency>
I was able to deploy sucessfully until I added apache.poi dependency.
What might be wrong, as I read some where to increase tomcat size to 1Gb, but it did not help.Please help someone, Thanks in advance.

Do you have two versions of the same library in your tomcat server?
What causes java.lang.IncompatibleClassChangeError?
As there says, Recompile the client code against the new library, and you should be good to go.

Problems creating JAXBContext in OSGI Bundle

Task: Batch process to transform data and store the result as XML-File on disk.
Problem: Marshalling objects, loading JAXBContextFactory in OSGI bundle.
Deadlock caused by java.lang.NoClassDefFoundError: org/eclipse/persistence/internal/libraries/asm/ClassWriter in FutureTask:311. No stacktrace or cause.
Question: What kind of setting or import do I miss to get the JAXBContext instantiation working?
Explanation:
For data processing I need to store my POJO Class as XML-File on Disk.
The POJO Class is generated from an xsd file with jaxb2-maven-plugin (xjc) filled in the batch process and then saved to disk where it will be further processed.
From an different Stack Overflow question I learned that OSGI uses different classloader and I have to use the right newInstance method to instantiate the JAXBContext. (Answer: https://stackoverflow.com/a/1043807/7461710).
This is my current newInstance call, The PrintDocument class is in the auto generated package com.some.package.generated and the ObjectFactory is in the same package and also generated by the jaxb2-maven-plugin.
The Programm fails during the newInstance call.
JAXBContext jaxbContext = JAXBContext.newInstance(PrintDocument.class.getPackage().getName(),
ObjectFactory.class.getClassLoader());
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
Logfile:
DEBUG XMLUtil:24 -Step 4/4: Save result into file. path: /somewhere/result.xml
DEBUG bind:282 - Searching jaxb.properties
DEBUG bind:300 - Searching the system property
DEBUG bind:565 - Trying to load org.eclipse.persistence.jaxb.JAXBContextFactory
[no further output]
We use bnd to Import packages, I have set the bnd.bnd file in the bundle to
Import-Package: \
org.eclipse.persistence.jaxb,\
*
As JAXB implementation I use moxy.
If I add this jaxb.properties file to the generated pojo package:
javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory
A regular class not found exception is thrown. Even in my unit test. (The unit-test performs the marshalling outside of the OSGI bundle)
javax.xml.bind.JAXBException: Provider org.eclipse.persistence.jaxb.JAXBContextFactory not found
- with linked exception:
[java.lang.ClassNotFoundException: org.eclipse.persistence.jaxb.JAXBContextFactory ]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:134)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:293)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:431)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:394)
[...]
But if I change the newInstance call to JAXBContextFactory.createContext based on this Answer https://stackoverflow.com/a/6820113/7461710, my unit-test works again and the programm gets stuck in the Deadlock caused by java.lang.NoClassDefFoundError: org/eclipse/persistence/internal/libraries/asm/ClassWriter as mentioned above.
Project dependencies:
<dependency>
<groupId>biz.aQute.bnd</groupId>
<artifactId>biz.aQute.launcher</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>org.eclipse.platform</groupId>
<artifactId>org.eclipse.osgi</artifactId>
<version>3.11.2</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.5</version>
</dependency>
<dependency>
<groupId>org.ops4j.pax.logging</groupId>
<artifactId>pax-logging-api</artifactId>
<version>1.9.1</version>
</dependency>
<dependency>
<groupId>org.ops4j.pax.logging</groupId>
<artifactId>pax-logging-service</artifactId>
<version>1.9.1</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160810</version>
</dependency>
<dependency>
<groupId>org.zeroturnaround</groupId>
<artifactId>zt-exec</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.io7m.xom</groupId>
<artifactId>xom</artifactId>
<version>1.2.10</version>
</dependency>
<dependency>
<groupId>org.ops4j.pax.jdbc</groupId>
<artifactId>pax-jdbc</artifactId>
<version>0.9.0</version>
<exclusions>
<exclusion>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.ops4j.pax.jdbc</groupId>
<artifactId>pax-jdbc-h2</artifactId>
<version>0.4.0</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.193</version>
</dependency>
<dependency>
<groupId>org.ops4j.pax.jdbc</groupId>
<artifactId>pax-jdbc-oracle</artifactId>
<version>0.9.0</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>6.0.0</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>osgi.cmpn</artifactId>
<version>6.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.scr</artifactId>
<version>2.0.6</version>
</dependency>
<dependency>
<groupId>org.apache.servicemix.bundles</groupId>
<artifactId>org.apache.servicemix.bundles.asm</artifactId>
<version>3.3.1_1</version>
</dependency>
<dependency>
<groupId>org.apache.servicemix.bundles</groupId>
<artifactId>org.apache.servicemix.bundles.saxon</artifactId>
<version>9.7.0-10_1</version>
</dependency>
<dependency>
<groupId>xml-resolver</groupId>
<artifactId>xml-resolver</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.configadmin</artifactId>
<version>1.8.12</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.gogo.shell</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.gogo.command</artifactId>
<version>1.0.0</version>
<exclusions>
<exclusion>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.felix</groupId>
<artifactId>org.apache.felix.gogo.runtime</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.moxy</artifactId>
<version>2.6.4</version>
</dependency>

The default is com.sun.xml.internal.ws.developer.JAXBContextFactory but you should not set it in your bundle as it is a sun private package.
Instead try to use this in your OSGi framework properties:
org.osgi.framework.bootdelegation=com.sun.*
This will allow the JAXBContext to find an instantiate the default JAXBContextImpl.

Wildfly10 Server giving ClassCastException on deploying EJB module

I'm trying to move from wildfly9 to wildfly 10.
My code works properly on wildfly9
But when I try to deploy my ejb module on wildfly 10 I get the following error:
java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory
I tried all the options available out there to correct this error but nothing helped me.
Here are the dependencies that i have in my pom
<dependencies>
<dependency>
<groupId>za.co.ecommunicate</groupId>
<artifactId>pl4sms-billing</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- ehcache dependency -->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>2.9.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>5.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
<!-- ehcache dependency -->
<dependency>
<groupId>za.co.ecommunicate</groupId>
<artifactId>pl4sms-persistence</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- dependencies require for test asserts -->
<!-- <dependency> <groupId>za.co.ecommunicate</groupId> <artifactId>pl4sms-web</artifactId>
<version>1.0-SNAPSHOT</version> </dependency> -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8.13</version>
</dependency>
<dependency>
<groupId>org.apache.openejb</groupId>
<artifactId>tomee-embedded</artifactId>
<version>1.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
According to the solutions available I have found the the problem is related to hibernate, I have updated hibernate dependencies, changing the scope and also adding dom4j dependency but nothing worked.
The same module gets deployed without any problem on wildfly 9.
Can anybody help me out in resolving this error.

I have found the solution of my question may be it will help others.
i got the solution from this blog.
I added the line in my war's MANIFEST.MF file:
Open {your war}/META-INF/MANIFEST.MF
Add this line at the end - Dependencies: org.dom4j export
and added the following line in persistence.xml:
<property name="hibernate.listeners.envers.autoRegister" value="false"/ >
And it worked for me.

You problem is this:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.1.0.Final</version>
</dependency>
It brings in the old dom4j jar: Reference this ticket: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory.
You either need to remove it, declare it as provided in scope, or not run the application on the Wildfly Server (which is probably not your preferred option).

Kafka Consumer Example throws ClassNotFoundException

I have Kafka 0.8 built using Scala 2.8; the steps followed from this site. I could also run the kafka-console-producer and kafka-console-consumer examples successfully. I am now experimenting with Consumer Group Example (Please the "Full Source Code" section). The exception I get is below:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
at java.lang.Thread.run(Thread.java:701)
Caused by: java.lang.NoClassDefFoundError: scala/Tuple2$mcJJ$sp
at kafka.consumer.ConsumerConfig.<init>(Unknown Source)
at ConsumerGroupExample.createConsumerConfig(ConsumerGroupExample.java:55)
at ConsumerGroupExample.<init>(ConsumerGroupExample.java:18)
at ConsumerGroupExample.main(ConsumerGroupExample.java:64)
... 6 more
Caused by: java.lang.ClassNotFoundException: scala.Tuple2$mcJJ$sp
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
... 10 more
My dependencies looks like this:
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.10</artifactId>
<version>0.8.0</version>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.3</version>
</dependency>
<dependency>
<groupId>com.yammer.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>2.2.0</version>
</dependency>
As a note I could get it running with a Python client. But I really need this done in Java. Would really appreciate any help!

You're using kafka built against 2.10 (see, that _2.10 in artifact name)
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.10</artifactId>
<version>0.8.0</version>
</dependency>
with scala 2.8.0
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.8.0</version>
</dependency>
Major scala versions (2.8.*, 2.9.*, 2.10.*) are binary incompatible between each other -- pick the right version of either kafka artifact or project's scala library and everything will be fine.

Apache Directory

I am using this doc.
But pom.xml is bit changed (because dependencies from example is not resolved and i have maven error messages), so part of pom.xml i next:
<dependency>
<groupId>org.apache.directory.server</groupId>
<artifactId>apacheds-core</artifactId>
<version>2.0.0-M15</version>
</dependency>
<dependency>
<groupId>org.apache.directory.server</groupId>
<artifactId>apacheds-all</artifactId>
<version>1.5.7</version>
</dependency>
<dependency>
<groupId>org.apache.directory.server</groupId>
<artifactId>apacheds-server-integ</artifactId>
<version>1.5.7</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>org.apache.directory.client.ldap</groupId>
<artifactId>ldap-client-api</artifactId>
<version>0.1</version>
</dependency>
Then I am running test from example i am receiving such error:
Exception in thread "main" java.lang.IncompatibleClassChangeError: Class org.apache.directory.server.core.DefaultDirectoryService does not implement the requested interface org.apache.directory.server.core.DirectoryService
at org.apache.directory.server.core.integ.FrameworkRunner.run(FrameworkRunner.java:170)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:77)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
Any ideas?
Test Class: http://pastebin.com/aPisMRSx

Change the version of apacheds-all to the same version as apacheds-core