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Unable to connect to Scylla API server: java.net.ConnectException: Connection refused
java.lang.IllegalStateException: Unable to connect to Scylla API server: java.net.ConnectException: Connection refused	at com.scylladb.jmx.api.APIClient.post(APIClient.java:116)	at org.apache.cassandra.service.StorageService.forceKeyspaceFlush(StorageService.java:645)	at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at mx4j.server.ReflectionMBeanInvoker.invokeImpl(ReflectionMBeanInvoker.java:156)	at mx4j.server.ReflectionMBeanInvoker.doInvoke(ReflectionMBeanInvoker.java:117)	at mx4j.server.ReflectionMBeanInvoker.invoke(ReflectionMBeanInvoker.java:52)	at mx4j.server.interceptor.InvokerMBeanServerInterceptor.invoke(InvokerMBeanServerInterceptor.java:238)	at mx4j.server.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:120)	at mx4j.server.interceptor.SecurityMBeanServerInterceptor.invoke(SecurityMBeanServerInterceptor.java:84)	at mx4j.server.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:120)	at mx4j.server.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:120)	at mx4j.server.interceptor.ContextClassLoaderMBeanServerInterceptor.invoke(ContextClassLoaderMBeanServerInterceptor.java:203)	at mx4j.server.MX4JMBeanServer.invoke(MX4JMBeanServer.java:1043)	at mx4j.server.ChainedMBeanServer.invoke(ChainedMBeanServer.java:196)	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)	at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:324)	at sun.rmi.transport.Transport$1.run(Transport.java:200)	at sun.rmi.transport.Transport$1.run(Transport.java:197)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.Transport.serviceCall(Transport.java:196)	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)	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)