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Apache Nifi - refused to connect to localhost error.Can anyone suggest what is the cause of this issue? Nifi version- 1.9.2,installed on windows machine

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Apache Nifi - refused to connect to localhost error.Can anyone suggest what is the cause of this issue? Nifi version- 1.9.2,installed on windows machine

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org.apache.nifi.web.server.JettyServer Failed to start web server... shutting down. java.net.BindException: Address already in use: bind

at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:331) at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:299) at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80) at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:235) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.server.Server.doStart(Server.java:398) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:935) at org.apache.nifi.NiFi.(NiFi.java:158) at org.apache.nifi.NiFi.(NiFi.java:72) at org.apache.nifi.NiFi.main(NiFi.java:297) 2020-02-27 11:51:11,834 INFO [Thread-1] org.apache.nifi.NiFi Initiating shutdown of Jetty web server... 2020-02-27 11:51:11,836 INFO [Thread-1] o.eclipse.jetty.server.AbstractConnector Stopped ServerConnector@355ee205{HTTP/1.1,[http/1.1]}{0.0.0.0:8080} 2020-02-27 11:51:11,837 INFO [Thread-1] org.eclipse.jetty.server.session node 0 Stopped scavenging

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