ava.lang.NoClassDefFoundError: org/apache/log4j/Category

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org/apache/log4j/Category
ava.lang.NoClassDefFoundError: org/apache/log4j/Category
at com.solarmetric.log.Log4JLogFactory.newLogAdapter(Log4JLogFactory.java:19)
at com.solarmetric.log.LogFactoryAdapter.getLog(LogFactoryAdapter.java:25)
at com.solarmetric.conf.ConfigurationImpl.getLog(ConfigurationImpl.java:115)
at kodo.enhance.JDOEnhancer.run(JDOEnhancer.java:2168)
at kodo.jdbc.integration.eclipse.EnhancerBuilder.build(EnhancerBuilder.java:40)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:615)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:157)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:249)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:202)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:615)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:232)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:268)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:297)
at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:182)

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