Hi, I'm new to Hibernate, as per Hibernate tutorial I tried to download on of the hibernate dependencies. I added the following entry in pom.xml
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>

When I ran maven compile, I got this error:

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).
Project ID: com.hibernate:hibernate-prj
POM Location: /projects/hibernate-prj/pom.xml
Validation Messages:

[0] 'dependencies.dependency.version' is missing for org.hibernate:hibernate-core:jar
Reason: Failed to validate POM for project com.hibernate:hibernate-prj at /projects/hibernate-prj/pom.xml
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.reactor.MavenExecutionException: Failed to validate POM for project com.hibernate:hibernate-prj at /projects/hibernate-prj/pom.xml
at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:404)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:272)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.project.InvalidProjectModelException: Failed to validate POM for project com.hibernate:hibernate-prj at /projects/hibernate-prj/pom.xml
at org.apache.maven.project.DefaultMavenProjectBuilder.processProjectLogic(DefaultMavenProjectBuilder.java:1077)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(DefaultMavenProjectBuilder.java:880)
at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFileInternal(DefaultMavenProjectBuilder.java:508)
at org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:200)
at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:604)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:487)
at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:391)
... 12 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Mon Mar 01 22:15:29 GMT 2010
[INFO] Final Memory: 1M/3M
[INFO] ------------------------------------------------------------------------

Can anyone pl. let me know what I'm doing wrong here? If I add any other dependency like log4j mentioned below everything works
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.12</version>
<scope>compile</scope>
</dependency>

When I add the above dependency then I'm not getting pom exceptions and it is downloaded properly.

Hi,

You need to specify the version of Hibernate Core that you want to use. For example, for Hibernate 3.3.1GA:



As you can see, in your other dependency you have specified a version, that's the reason why it does not fail :)

Regards,
Nuno Guerreiro

Thanks Nuno, Yes, I came around this problem after doing some research, I gave the dependency version as you mentioned and it worked. Should this thing have been mentioned in the sample pom.xml in the tutorial? After all any newbie like me fall in this trap!

Yes, I believe it should have been included in the tutorial. AFAIK, you can only omit the version in plugins, not in artifacts on which a project depends.