java.lang.IllegalStateException: java.net.ConnectException: Connection refused

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java.net.ConnectException: Connection refused
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java.net.ConnectException: Connection refused
java.lang.IllegalStateException: java.net.ConnectException: Connection refused	at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:107)	at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:1)	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:382)	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:336)	at org.springframework.boot.devtools.classpath.ClassPathFileChangeListener.publishEvent(ClassPathFileChangeListener.java:68)	at org.springframework.boot.devtools.classpath.ClassPathFileChangeListener.onChange(ClassPathFileChangeListener.java:64)	at org.springframework.boot.devtools.filewatch.FileSystemWatcher$Watcher.fireListeners(FileSystemWatcher.java:306)	at org.springframework.boot.devtools.filewatch.FileSystemWatcher$Watcher.updateSnapshots(FileSystemWatcher.java:299)	at org.springframework.boot.devtools.filewatch.FileSystemWatcher$Watcher.scan(FileSystemWatcher.java:259)	at org.springframework.boot.devtools.filewatch.FileSystemWatcher$Watcher.run(FileSystemWatcher.java:239)	at java.lang.Thread.run(Thread.java:745)Caused by: java.net.ConnectException: Connection refused	at java.net.PlainSocketImpl.socketConnect(Native Method)	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)	at java.net.Socket.connect(Socket.java:589)	at java.net.Socket.connect(Socket.java:538)	at sun.net.NetworkClient.doConnect(NetworkClient.java:180)	at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)	at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)	at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)	at sun.net.www.http.HttpClient.New(HttpClient.java:308)	at sun.net.www.http.HttpClient.New(HttpClient.java:326)	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1168)	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1104)	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:998)	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:932)	at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:78)	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)	at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:93)	at org.springframework.boot.devtools.remote.client.HttpHeaderInterceptor.intercept(HttpHeaderInterceptor.java:57)	at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:85)	at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:69)	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)	at org.springframework.boot.devtools.remote.client.ClassPathChangeUploader.onApplicationEvent(ClassPathChangeUploader.java:102)	... 12 more