I tried to follow the Hibernate Tutorial posted on official Hibernate site. Here is the link to the tutorial. I was using Apache Maven version 2.2.1 and I had to make a lot of modifications to the tutorial code (specially in pom.xml) to make it work. I want to post these fixes/code updates and maybe it might help someone who is having problems walking through the tutorial.
There were so many issues and the post was getting big so I am splitting it into different posts. you can skip reading the 'preface' section of the other posts in this series.
Problem 2 of 6:
Using Proper Version of slf4j JAR Files
Still trying to launch the HSQL Serverby running the maven command:
mvn exec:java -Dexec.mainClass="org.hsqldb.Server" -Dexec.args="-database.0 file:target/data/tutorial"
And I was getting the following error:
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'exec'.
[INFO] ------------------------------------------------------------------------
[INFO] Building First hibernate tutorials
[INFO] task-segment: [exec:java]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing exec:java
[INFO] No goals needed for project - skipping
[WARNING] While downloading javassist:javassist:3.0
This artifact has been relocated to jboss:javassist:3.0.
[INFO] [exec:java {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. null
tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured while executing the Java class. null
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
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:597)
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.plugin.MojoExecutionException: An exception occured while executing the Java class. null
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:338)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
Caused by: java.lang.reflect.InvocationTargetException
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:597)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ExceptionInInitializerError
at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:31)
at org.hibernate.tutorial.util.HibernateUtil.(HibernateUtil.java:12)
at org.hibernate.tutorial.EventManager.createAndStoreEvent(EventManager.java:37)
at org.hibernate.tutorial.EventManager.main(EventManager.java:25)
... 6 more
Caused by: java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory
at org.slf4j.LoggerFactory.(LoggerFactory.java:60)
at org.hibernate.cfg.Configuration.(Configuration.java:151)
at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:21)
... 9 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 second
[INFO] Finished at: Tue May 11 17:21:02 PDT 2010
[INFO] Final Memory: 5M/15M
[INFO] ------------------------------------------------------------------------
This is due to a change in access modifier from one version of slf4j to the other.
I fixed it by using slf4j jars of version 1.5.3 (instead of 1.5.6). Make the following change in the pom.xml.
org.slf4j
slf4j-simple
1.5.3
Well, that fixed the earlier error but it was not able to find other necessary classes. The next error I got was:
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'exec'.
[INFO] ------------------------------------------------------------------------
[INFO] Building First hibernate tutorials
[INFO] task-segment: [exec:java]
[INFO] ------------------------------------------------------------------------
[INFO] Preparing exec:java
[INFO] No goals needed for project - skipping
[WARNING] While downloading javassist:javassist:3.0
This artifact has been relocated to jboss:javassist:3.0.
[INFO] [exec:java {execution: default-cli}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] An exception occured while executing the Java class. null
name
[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: An exception occured while executing the Java class. null
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
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:597)
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.plugin.MojoExecutionException: An exception occured while executing the Java class. null
at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:338)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
... 17 more
Caused by: java.lang.reflect.InvocationTargetException
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:597)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:283)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ExceptionInInitializerError
at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:31)
at org.hibernate.tutorial.util.HibernateUtil.(HibernateUtil.java:12)
at org.hibernate.tutorial.EventManager.createAndStoreEvent(EventManager.java:37)
at org.hibernate.tutorial.EventManager.main(EventManager.java:25)
... 6 more
Caused by: java.lang.NoSuchFieldError: name
at org.slf4j.impl.SimpleLogger.(SimpleLogger.java:83)
at org.slf4j.impl.SimpleLoggerFactory.getLogger(SimpleLoggerFactory.java:67)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:103)
at org.hibernate.cfg.Configuration.(Configuration.java:151)
at org.hibernate.tutorial.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:21)
... 9 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 second
[INFO] Finished at: Tue May 11 17:45:08 PDT 2010
[INFO] Final Memory: 5M/15M
[INFO] ------------------------------------------------------------------------
I fixed that by adding another dependency as follows:
org.slf4j
slf4j-api
1.5.3
now my pom.xml looks like this:
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
4.0.0
org.hibernate.tutorials
hibernate-tutorial
1.0-SNAPSHOT
First hibernate tutorials
org.hibernate
hibernate-core
3.3.1.GA
javax.servlet
servlet-api
[2.4,)
org.slf4j
slf4j-simple
1.5.3
org.slf4j
slf4j-api
1.5.3
javassist
javassist
[3.0,)
junit
junit
3.8.1
test
hsqldb
hsqldb
1.8.0.10
${artifactId}
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