Hi, i have the same problem:
[WARN ] [e.jetty.util.thread.QueuedThreadPool] - QueuedThreadPool[ESH-httpClient-common]@1963c8a{STOPPING,10<=10<=40,i=1,q=7}[org.eclipse.jetty.util.thread.TryExecutor$$Lambda$116/8301263@1fad03c] Couldn't stop Thread[ESH-httpClient-common-97,5,main]
and found this
see here from @mhilbush
but do not understand at all what to do ( as i’m a Dummy 
)