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Cannot access defaults field of Properties

I am having trouble deploying my application to tomcat. It was working before, but i formated my computer and it stopped working.
My pom.xml:
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.academiadecodigo.javabank</groupId>
<artifactId>javabank-step10-show-delete</artifactId>
<version>0.0.1</version>
<packaging>war</packaging>
<name>Java Bank Webapp</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.21.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.11.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring4</artifactId>
<version>3.0.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>5.3.6.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.196</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.12</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version> 3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.0</version>
</dependency>
<!-- JSR-301/3 validation -->
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.2.Final</version>
</dependency>
</dependencies>
<build>
<finalName>Java Bank</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>10</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<url>http://localhost:8080/manager/text</url>
<server>tomcat</server>
<path>/javabank</path>
</configuration>
</plugin>
</plugins>
</build>
This is the error:
Error injecting constructor, java.lang.ExceptionInInitializerError: Cannot access defaults field of Properties
at org.apache.maven.plugin.war.WarMojo.(Unknown Source)
while locating org.apache.maven.plugin.war.WarMojo
I have tried:
https://www.programmersought.com/article/85431846620/
https://www.programmersought.com/article/31114978502/
https://maven.apache.org/plugins/maven-war-plugin/dependency-info.html
Deleting the .m2 folder
"And" all the solutions on stackOverflow
I know this is not the best formulated question but i dont know what else to do...

I followed instructions in Comment by Piotr P. Karwasz. That worked out fine! The problem with one of the solutions i tried was the version number.
Solution:
https://maven.apache.org/plugins/maven-war-plugin/plugin-info.html

What dependency am I missing for org.springframework.mock.web?

I am trying to use MockMultipartFile in existing source code for Egads but I keep getting this error: package org.springframework.mock.web does not exist
Here is the updated pom file:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yahoo.egads</groupId>
<artifactId>egads</artifactId>
<name>EGADS Anomaly Detection System</name>
<description>EGADS system, consumes time series and outputs anomalies.</description>
<version>0.4.0</version>
<organization>
<name>Yahoo Inc.</name>
<url>https://www.yahoo.com/</url>
</organization>
<inceptionYear>2015</inceptionYear>
<developers>
<developer>
<organization>Yahoo Inc.</organization>
<organizationUrl>https://www.yahoo.com/</organizationUrl>
</developer>
</developers>
<licenses>
<license>
<name>GPL V3</name>
<url>https://www.gnu.org/licenses/gpl-3.0.en.html</url>
<distribution>repo</distribution>
</license>
</licenses>
<packaging>jar</packaging>
<issueManagement>
<system>Github</system>
<url>https://github.com/yahoo/egads/issues</url>
</issueManagement>
<ciManagement>
<system>Travis</system>
<url>https://travis-ci.org/yahoo/egads</url>
</ciManagement>
<distributionManagement>
<repository>
<id>bintray-yahoo-egads</id>
<name>yahoo-egads</name>
<url>https://api.bintray.com/maven/yahoo/maven/egads;publish=1</url>
</repository>
</distributionManagement>
<properties>
<spring-boot.version>2.0.3.RELEASE</spring-boot.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<repositories>
<repository>
<id>bintray-yahoo-maven</id>
<name>bintray</name>
<url>http://yahoo.bintray.com/maven</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>bintray-yahoo-maven</id>
<name>bintray-plugins</name>
<url>http://yahoo.bintray.com/maven</url>
</pluginRepository>
</pluginRepositories>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
<dependency>
<groupId>com.github.lbordowitz.openforecast</groupId>
<artifactId>openforecast</artifactId>
<version>0.5.0</version>
</dependency>
<dependency>
<groupId>jfree</groupId>
<artifactId>jfreechart</artifactId>
<version>1.0.13</version>
</dependency>
<dependency>
<groupId>jfree</groupId>
<artifactId>jcommon</artifactId>
<version>1.0.16</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20140107</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>3.2</version>
</dependency>
<!-- TEST DEPENDENCIES -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>5.14.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-mock</artifactId>
<version>2.0.8</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
</dependency>
<dependency>
<groupId>com.github.lbordowitz.openforecast</groupId>
<artifactId>openforecast</artifactId>
</dependency>
<dependency>
<groupId>jfree</groupId>
<artifactId>jfreechart</artifactId>
</dependency>
<dependency>
<groupId>jfree</groupId>
<artifactId>jcommon</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
</dependency>
<!-- TEST DEPENDENCIES -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<classifier>exec</classifier>
</configuration>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<version>2.5.2</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.scm</groupId>
<artifactId>maven-scm-provider-gitexe</artifactId>
<version>1.8.1</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
<executions>
<execution>
<id>deploy</id>
<phase>deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
The end goal for using MockMultiPartFile is to convert the path of a file from a command line argument into a multipart file. But I am unable to add this package to my project as of now.
I want to know what other items I need to add to the pom file in order to use this package in my project. Thank you.

You have a mess in your Spring Framework dependencies. Remove the specific <version> tags and let spring-boot-starter-parent mange the dependencies:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
You are trying to use Spring Framework 3.X, 4.X, 5.X (from Spring Boot 2.X) components at the same time, these are not compatible!
Most likely one of the 3.X dependencies is downgrading spring-test to version which doesn't have package org.springframework.mock.web. You can confirm this by inspecting mvn dependency:tree.

Maven project setup

I currently got a project with flat structure with following dependency;
Core --> core.jar
Service --> WAR
Domain --> domain.jar
Web -> WAR
Pretty much, everything depends on core.jar from Core module, and Web depend on domain jar from Domain module, which is depend on Core.
I'm planning to convert this to Maven, I need some feed back on possible best structure I should use.
Choices I have is to keep the current structure then produce jar files from each module and use them as part of dependency with maven. Or
Re structure the modules in some sort of hierarchy, where I need some help.
I want to follow some sort of best practice use of Maven.

Set up a parent pom, which you can use to keep the dependencies managed across the child projects. Then set up each of your jar/war artifacts as modules.
Each module sources its dependencies using the normal <dependencies> in the module pom.
so have this:
parent-project [pom]:
modules:
core [jar]
domain [jar] - depends on core
service [war] - depends on core
web [war] - depends on domain
And as a concrete example, here's a sample of one of my projects:
parent pom
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>myproject-parent</artifactId>
<version>1.0.0</version>
<packaging>pom</packaging>
<name>myproject-parent</name>
<url>http://maven.apache.org</url>
<properties>
<jersey.version>2.6</jersey.version>
<jsonunit.version>1.5.5</jsonunit.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.1.4.RELEASE</spring.version>
</properties>
<modules>
<module>api-client</module>
<module>load-tests</module>
<module>regression-tests</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.18.1</version>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>cobertura-maven-plugin</artifactId>
<version>2.7</version>
</plugin>
</plugins>
</reporting>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.connectors</groupId>
<artifactId>jersey-apache-connector</artifactId>
<version>${jersey.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
<dependency>
<groupId>commons-cli</groupId>
<artifactId>commons-cli</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.10</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
<version>2.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.0.5-beta</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path-assert</artifactId>
<version>2.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.22</version>
</dependency>
<dependency>
<groupId>net.javacrumbs.json-unit</groupId>
<artifactId>json-unit</artifactId>
<version>${jsonunit.version}</version>
</dependency>
<dependency>
<groupId>net.javacrumbs.json-unit</groupId>
<artifactId>json-unit-fluent</artifactId>
<version>${jsonunit.version}</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
</dependencies>
</dependencyManagement>
api-client
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>api-client</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>org.example</groupId>
<artifactId>myproject-parent</artifactId>
<version>1.0.0</version>
</parent>
<properties>
<xmlunit.version>2.0.0-alpha-03</xmlunit.version>
</properties>
<name>api-client</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.connectors</groupId>
<artifactId>jersey-apache-connector</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>commons-cli</groupId>
<artifactId>commons-cli</artifactId>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path-assert</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
</dependency>
<dependency>
<groupId>org.xmlunit</groupId>
<artifactId>xmlunit-core</artifactId>
<version>${xmlunit.version}</version>
</dependency>
<dependency>
<groupId>org.xmlunit</groupId>
<artifactId>xmlunit-matchers</artifactId>
<version>${xmlunit.version}</version>
</dependency>
<dependency>
<groupId>net.javacrumbs.json-unit</groupId>
<artifactId>json-unit</artifactId>
</dependency>
<dependency>
<groupId>net.javacrumbs.json-unit</groupId>
<artifactId>json-unit-fluent</artifactId>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
</dependencies>
<build>
<plugins>
... snip ...
</plugins>
</build>
</project>
and finally load-tests, which depends on api-client
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>load-tests</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>org.example</groupId>
<artifactId>myproject-parent</artifactId>
<version>1.0.0</version>
</parent>
<name>load-tests</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.example</groupId>
<artifactId>api-client</artifactId>
<version>${parent.version}</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>jaxen</groupId>
<artifactId>jaxen</artifactId>
<version>1.1.1</version>
</dependency>
</dependencies>
<build>
<plugins>
... snip ...
</plugins>
</build>
</project>

I think what I m trying to demonstrate will match your choice.
Create a POM Project as Parent
Add each jar and war as Module
Choices I have is to keep the current structure then produce jar files from each module and use them as part of dependency with maven.

java.lang.LinkageError: loader constraint violation: when resolving method

I have the following:
1. EJB in business tier
package ejb.x.y;
#Stateless
public class FileFormatConvertor {
public byte[] fromExcelToCsv(Workbook workbook, Sheet sheet, String delimiter) throws Exception {
...
}
2. Bean in the web tier
package web.x.y;
#Named
#SessionScoped
public class FileUploadViewAction implements Serializable {
#EJB
private FileFormatConvertor fileFormatConvertor ;
// Other declarations
if (fileType == Type.EXCEL) {
bytesToUpload = fileFormatConvertor.fromExcelToCsv(workbook, sheet, delimiter);
}
// Rest of code
}
3. POM Files
Ear pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>xy-portal</artifactId>
<groupId>com.xy</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xy</groupId>
<artifactId>ear-x-y</artifactId>
<version>${project.version}</version>
<packaging>ear</packaging>
<name>ear-x-y</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<finalName>ear-x-y</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ear-plugin</artifactId>
<version>2.6</version>
<configuration>
<version>6</version>
<defaultLibBundleDir>lib</defaultLibBundleDir>
<modules>
<webModule>
<groupId>com.xy</groupId>
<artifactId>web-x-y</artifactId>
<contextRoot>/xy</contextRoot>
<bundleFileName>xy-portal-web.war</bundleFileName>
</webModule>
<ejbModule>
<groupId>com.xy</groupId>
<artifactId>ejb-x-y</artifactId>
<bundleFileName>xy-portal-ejb.jar</bundleFileName>
</ejbModule>
</modules>
</configuration>
</plugin>
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<configuration>
<skip>false</skip>
<hostname>0.0.0.0</hostname>
<!--<hostname>xy</hostname>-->
<port>0000</port>
<filename>xy-portal-ear.ear</filename>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.xy</groupId>
<artifactId>xy-portal-ejb</artifactId>
<version>${project.version}</version>
<type>ejb</type>
</dependency>
<dependency>
<groupId>com.xy</groupId>
<artifactId>xy-portal-web</artifactId>
<version>${project.version}</version>
<type>war</type>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>2.3.1.GA</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>2.3.1.GA</version>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>xy-client</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>xy-datamodel</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
</project>
Ejb pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>xy-portal</artifactId>
<groupId>com.xy</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xy</groupId>
<artifactId>xy-portal-ejb</artifactId>
<version>${project.version}</version>
<packaging>ejb</packaging>
<name>xy-portal-ejb</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.jboss.as</groupId>
<artifactId>jboss-as-ejb3</artifactId>
<version>7.1.2.Final</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-6.0</artifactId>
<version>3.0.3.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.infinispan</groupId>
<artifactId>infinispan-core</artifactId>
<version>6.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.testng</groupId>
<artifactId>arquillian-testng-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-api</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-api-maven</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-api-maven-archive</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.resolver</groupId>
<artifactId>shrinkwrap-resolver-impl-maven-archive</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.eu.ingwar.tools</groupId>
<artifactId>arquillian-suite-extension</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.opencsv</groupId>
<artifactId>opencsv</artifactId>
<version>3.7</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-ejb-plugin</artifactId>
<version>2.3</version>
<configuration>
<ejbVersion>3.1</ejbVersion>
<archive>
<manifestEntries>
<Dependencies>org.infinispan export</Dependencies>
</manifestEntries>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
Web pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>xy-portal</artifactId>
<groupId>com.xy</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>xy-portal-web</artifactId>
<version>${project.version}</version>
<packaging>war</packaging>
<name>xy-portal-web</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.14</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.primefaces.themes</groupId>
<artifactId>all-themes</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>5.2</version>
</dependency>
<dependency>
<groupId>org.omnifaces</groupId>
<artifactId>omnifaces</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>org.primefaces.extensions</groupId>
<artifactId>primefaces-extensions</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>font-awesome</artifactId>
<version>4.6.1</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>xy-client</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>xy-portal-ejb</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>${project.groupId}</groupId>
<artifactId>xy-datamodel</artifactId>
<version>${project.version}</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
</exclusion>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</exclusion>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-jpamodelgen</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>2.3.1.GA</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>2.3.1.GA</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>jaxrs-api</artifactId>
<version>3.0.8.Final</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.1.2.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.spec</groupId>
<artifactId>jboss-javaee-web-6.0</artifactId>
<version>3.0.3.Final</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>jboss</groupId>
<artifactId>jbosssx</artifactId>
<version>3.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jboss</groupId>
<artifactId>jboss-jaas</artifactId>
<version>3.2.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>net.glxn</groupId>
<artifactId>qrgen</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>net.sf.barcode4j</groupId>
<artifactId>barcode4j-light</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
</project>
4. Exception
Caused by: javax.faces.el.EvaluationException: java.lang.LinkageError: loader constraint violation: when resolving method "ejb.x.y.FileFormatConvertor.fromExcelToCsv(Lorg/apache/poi/ss/usermodel/Workbook;Lorg/apache/poi/ss/usermodel/Sheet;Ljava/lang/String;)[B" the class loader (instance of org/jboss/modules/ModuleClassLoader) of the current class, web.x.y.FileUploadViewAction, and the class loader (instance of org/jboss/modules/ModuleClassLoader) for resolved class, ejb.x.y.FileFormatConvertor, have different Class objects for the type Lorg/apache/poi/ss/usermodel/Workbook;Lorg/apache/poi/ss/usermodel/Sheet;Ljava/lang/String;)[B used in the signature
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final]
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.1.7-jbossorg-2.jar:]
... 36 more
What am I doing wrong to be getting this exception?
So far I have done the following:
1. Check for cyclic class path dependencies
2. Move the ejb to web tier as managed bean (solves the problem but the bean is accessed elsewhere by other clients, making the business tier a more natural home)
3. Searched this site for similar problem/solution trails but have found none
Please help...

I got this to work. My answer is just to emphasize what mvera is saying here..
E.g. Both pom.xml content for war and ejb modules shared the following dependency:
<dependencies>
...
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
</dependency>
...
</dependencies>
Here is what i did ...
Copy this dependency entry (and all shared dependencies) to the pom.xml in your ear module.
Mark the shared dependencies as provided in the pom.xml files of your ejb and war modules such that resultant dependency entry in the pom.xml files now looks similar to below
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.14</version>
<scope>provided</scope>
</dependency>
Rebuild your project!

You war and ejb.jar have each their own classloader, so each classloader has its own definition of poi classes.
You should try to put poi jars and all common jars to your ejb.jar and war in ear/lib. Mark dependencies as "provided" in you pom.xml for ejb.jar and war.
This way both war and ejb.jar will inherit of classes defined by their parent classloader, the ear classloader.
You should never try to pass a class defined in a classloader to another classloader but use a class defined in a common classloader.

compile assembly:single error

I used to compile my project using this command
mvn clean compile assembly:signle
It always worked until today when I got this error
Could not find goal 'signle' in plugin
org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5 among
available goals directory, assembly, directory-single, attached,
single, help, unpack, directory-inline -> [Help 1]
here is my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>notifier</groupId>
<artifactId>notifier</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<spring.version>3.2.2.RELEASE</spring.version>
<junit.version>4.11</junit.version>
<jdk.version>1.6</jdk.version>
</properties>
<build>
<!-- run: mvn clean compile assembly:single -->
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.zoovila.notifier.jobs.send.NotificationsJob</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.8</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.5.8</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
<!--iOS Push Notifications-->
<dependency>
<groupId>com.relayrides</groupId>
<artifactId>pushy</artifactId>
<version>0.2</version>
</dependency>
<!-- Spring framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- MySQL database driver -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>
<!--Amazon AWS SKD-->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk</artifactId>
<version>1.7.2</version>
</dependency>
<!--Velocity Templating Engine-->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-tools</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.8.4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
I didn't change pom.xml. any idea how can I fix this?

You have an error in calling maven:
mvn clean compile assembly:signle
^^^
It must be
mvn clean compile assembly:single