Runnable dashboarding_m is not starting

Runnable dashboarding_m doesn't start, this is the last message in the log file -

2018-08-11 13:37:31,981|INFO||||||org.apache.catalina.loader.WebappClassLoaderBase

checkStateForResourceLoading - Illegal access: this web application instance has been stopped already. Could not load [net.sf.ehcache.util.concurrent.ConcurrentHashMap$ValueIterator]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. 

java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [net.sf.ehcache.util.concurrent.ConcurrentHashMap$ValueIterator]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.