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java.net.SocketException: Socket is closed	at sun.security.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1520)	at sun.security.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1541)	at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:71)	at okio.Okio$1.write(Okio.java:78)	at okio.AsyncTimeout$1.write(AsyncTimeout.java:180)	at okio.RealBufferedSink.emit(RealBufferedSink.java:178)	at okhttp3.internal.ws.WebSocketWriter.writeControlFrameSynchronized(WebSocketWriter.java:152)	at okhttp3.internal.ws.WebSocketWriter.writePing(WebSocketWriter.java:79)	at okhttp3.internal.ws.RealWebSocket.sendPing(RealWebSocket.java:143)	at io.fabric8.kubernetes.client.dsl.internal.WatchConnectionManager$1$1.run(WatchConnectionManager.java:141)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)