Satellite 5.6 does not start and stuck with "Waiting for tomcat to be ready ..."

Issue

• Satellite 5.6 does not start and stuck with "Waiting for tomcat to be ready ..."

# rhn-satellite start
Starting spacewalk services...
Initializing jabberd processes ...
Starting router:                                           [  OK  ]
Starting sm:                                               [  OK  ]
Starting c2s:                                              [  OK  ]
Starting s2s:                                              [  OK  ]
Starting Oracle Net Listener ...                           [  OK  ]
Starting Oracle DB instance "rhnsat" ...                   [  OK  ]
Starting tomcat6:                                          [  OK  ]
Waiting for tomcat to be ready ...