import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

private static Logger LOGGER = LoggerFactory.getLogger(myClass.class);

Caused by: java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory
at com.ibm.beans.session.HijRequestBusinessServices.<clinit>(HijRequestBusinessServices.java:99)
at java.lang.J9VMInternals.initializeImpl(Native Method)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:236)
... 130 more