Normal usage of Optimize shows warning in logs

09:59:19.227 [qtp288994035-17] WARN  o.e.j.w.jsr356.annotations.JsrEvents - Unable to report throwable to websocket (no @OnError handler declared): org.camunda.optimize.websocket.StatusWebSocket
org.eclipse.jetty.io.EofException: null
	at org.eclipse.jetty.io.ChannelEndPoint.flush(ChannelEndPoint.java:286)
	at org.eclipse.jetty.io.WriteFlusher.flush(WriteFlusher.java:393)
	at org.eclipse.jetty.io.WriteFlusher.write(WriteFlusher.java:277)
	at org.eclipse.jetty.io.AbstractEndPoint.write(AbstractEndPoint.java:380)
	at org.eclipse.jetty.websocket.common.io.FrameFlusher.flush(FrameFlusher.java:218)
	at org.eclipse.jetty.websocket.common.io.FrameFlusher.process(FrameFlusher.java:157)
	at org.eclipse.jetty.util.IteratingCallback.processing(IteratingCallback.java:241)
	at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:224)
	at org.eclipse.jetty.websocket.common.io.FrameFlusher.enqueue(FrameFlusher.java:90)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.outgoingFrame(AbstractWebSocketConnection.java:495)
	at org.eclipse.jetty.websocket.common.WebSocketSession.close(WebSocketSession.java:223)
	at org.eclipse.jetty.websocket.common.WebSocketSession.close(WebSocketSession.java:202)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onConnectionStateChange(AbstractWebSocketConnection.java:353)
	at org.eclipse.jetty.websocket.common.io.IOState.notifyStateListeners(IOState.java:184)
	at org.eclipse.jetty.websocket.common.io.IOState.onReadFailure(IOState.java:498)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:547)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:391)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Broken pipe
	at sun.nio.ch.FileDispatcherImpl.writev0(Native Method)
	at sun.nio.ch.SocketDispatcher.writev(SocketDispatcher.java:51)
	at sun.nio.ch.IOUtil.write(IOUtil.java:148)
	at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:504)
	at org.eclipse.jetty.io.ChannelEndPoint.flush(ChannelEndPoint.java:266)
	... 27 common frames omitted