org.slf4j.LoggerFactory could not be successfully initialized. See also http://www.slf4j.org/codes.html#unsuccessfulInit

Caused by: java.lang.IllegalStateException: org.slf4j.LoggerFactory could not be successfully initialized. See also http://www.slf4j.org/codes.html#unsuccessfulInit
 at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:310)
 at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276)
 at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:156)