Hibernate MultiMap cannot be found while code generation

Question

While i'm trying generate some classes by Hibernate using existing db relation it generates some error:

org.hibernate.console.HibernateConsoleRuntimeException: Received a NoClassDefFoundError, probably the console configuration classpath is incomplete or contains conflicting versions of the same class
Received a NoClassDefFoundError, probably the console configuration classpath is incomplete or contains conflicting versions of the same class
org.hibernate.console.HibernateConsoleRuntimeException: Received a NoClassDefFoundError, probably the console configuration classpath is incomplete or contains conflicting versions of the same class
Received a NoClassDefFoundError, probably the console configuration classpath is incomplete or contains conflicting versions of the same class
java.lang.NoClassDefFoundError: org/apache/commons/collections/MultiMap
org/apache/commons/collections/MultiMap
java.lang.ClassNotFoundException: org.apache.commons.collections.MultiMap cannot be found by org.jboss.tools.hibernate.runtime.v_5_1_5.0.1.Final-v20160331-1852-B88
org.apache.commons.collections.MultiMap cannot be found   byorg.jboss.tools.hibernate.runtime.v_5_1_5.0.1.Final-v20160331-1852-B88

My maven file:

<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
  <plugin>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.3</version>
    <configuration>
      <source>1.8</source>
      <target>1.8</target>
    </configuration>
  </plugin>
</plugins>
</build>
<dependencies>
<dependency>
    <groupId>org.firebirdsql.jdbc</groupId>
    <artifactId>jaybird-jdk18</artifactId>
    <version>2.2.10</version>
</dependency>
<dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-core</artifactId>
   <version>5.1.0.Final</version>
</dependency>
<dependency>
    <groupId>commons-collections</groupId>
    <artifactId>commons-collections</artifactId>
    <version>3.2.2</version>
</dependency>

I see apache common-collections jar in Maven Dependencies and i am able to use apache's MultiMap in my code.

Answer 1

I had the same issue. Here is how I fixed it: Open Edit Configuration dialog and go to Classpath tab, remove project-name (default classpath), click the button "Add Projects..." to add your project. Then it works.

Or you can try using previous version instead of v5.1. In hibernate perspective, "your configuration" / Edit configuration, Change hibernate version to previous version like v4.3.

Answer 2

Just to chime in: Eclipse Mars. Hibernate 5.1.0. JDK 8. As Gordon and Kevin mentioned above, changing the version of Hibernate to 4.3 in in Edit Configuration worked for me.