"TimeoutException" and "No resource class match"

When I start openHAB from Eclipse, I get this Exception again and again:

java.util.concurrent.TimeoutException: Idle timeout expired: 30002/30000 ms
	at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:171)
	at org.eclipse.jetty.io.IdleTimeout.idleCheck(IdleTimeout.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
org.eclipse.jetty.util [org.eclipse.jetty.io.WriteFlusher] DEBUG : ignored: WriteFlusher@3288549e{IDLE}->null
java.util.concurrent.TimeoutException: Idle timeout expired: 30002/30000 ms
	at org.eclipse.jetty.io.IdleTimeout.checkIdleTimeout(IdleTimeout.java:171)
	at org.eclipse.jetty.io.IdleTimeout.idleCheck(IdleTimeout.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
org.eclipse.jetty.util [org.eclipse.jetty.io.AbstractEndPoint] DEBUG : Ignored idle endpoint SocketChannelEndPoint@5bd4f306{l=/0:0:0:0:0:0:0:1:8080,r=/0:0:0:0:0:0:0:1:49883,OPEN,fill=-,flush=-,to=30002/30000}{io=0/0,kio=0,kro=1}->HttpConnection@6f6add2[p=HttpParser{s=CONTENT,0 of -1},g=HttpGenerator@7c74553e{s=COMMITTED}]=>HttpChannelOverHttp@3897c463{s=HttpChannelState@7d28f932{s=WAITING rs=ASYNC os=COMMITTED is=IDLE awp=false se=false i=false al=2},r=1,c=false/false,a=WAITING,uri=//localhost:8080/rest/events/states,age=90095}
org.eclipse.jetty.util [org.eclipse.jetty.io.IdleTimeout] DEBUG : SocketChannelEndPoint@2914820b{l=/0:0:0:0:0:0:0:1:8080,r=/0:0:0:0:0:0:0:1:49881,OPEN,fill=-,flush=-,to=30006/30000}{io=0/0,kio=0,kro=1}->HttpConnection@66ee6362[p=HttpParser{s=CONTENT,0 of -1},g=HttpGenerator@57c284ea{s=COMMITTED}]=>HttpChannelOverHttp@27d36959{s=HttpChannelState@23ece97b{s=WAITING rs=ASYNC os=COMMITTED is=IDLE awp=false se=false i=false al=2},r=1,c=false/false,a=WAITING,uri=//localhost:8080/rest/events/states,age=150429} idle timeout check, elapsed: 30006 ms, remaining: -6 ms
org.eclipse.jetty.util [org.eclipse.jetty.io.IdleTimeout] DEBUG : SocketChannelEndPoint@2914820b{l=/0:0:0:0:0:0:0:1:8080,r=/0:0:0:0:0:0:0:1:49881,OPEN,fill=-,flush=-,to=30006/30000}{io=0/0,kio=0,kro=1}->HttpConnection@66ee6362[p=HttpParser{s=CONTENT,0 of -1},g=HttpGenerator@57c284ea{s=COMMITTED}]=>HttpChannelOverHttp@27d36959{s=HttpChannelState@23ece97b{s=WAITING rs=ASYNC os=COMMITTED is=IDLE awp=false se=false i=false al=2},r=1,c=false/false,a=WAITING,uri=//localhost:8080/rest/events/states,age=150429} idle timeout expired
org.eclipse.jetty.util [org.eclipse.jetty.io.FillInterest] DEBUG : onFail FillInterest@13210858{null}

Also sometimes I get this messages:

org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : Resource class org.openhab.core.io.rest.sse.SseResource may get selected, request path : org.openhab.core.io.rest.sse.SseResource, resource class @Path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.io.rest.core.internal.link.ItemChannelLinkResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.automation.rest.internal.RuleResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.ui.icon.internal.IconSetResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.io.rest.core.internal.thing.ThingResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.io.rest.core.internal.service.ConfigurableServiceResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.io.rest.core.internal.channel.ChannelTypeResource, request path : /events
org.apache.cxf.cxf-rt-frontend-jaxrs [org.apache.cxf.jaxrs.utils.JAXRSUtils] DEBUG : No resource class match for org.openhab.core.automation.rest.internal.ModuleTypeResource, request path : /events

Where does this come from and what can I do about it?