10:48:59.299 [xxl-job, executor ExecutorRegistryThread] ERROR c.x.j.c.u.XxlJobRemotingUtil - [postBody,143] - Connection refused: connect
java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
	at java.net.Socket.connect(Socket.java:606)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:499)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:594)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:278)
	at sun.net.www.http.HttpClient.New(HttpClient.java:375)
	at sun.net.www.http.HttpClient.New(HttpClient.java:393)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1255)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1182)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1076)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1010)
	at com.xxl.job.core.util.XxlJobRemotingUtil.postBody(XxlJobRemotingUtil.java:99)
	at com.xxl.job.core.biz.client.AdminBizClient.registry(AdminBizClient.java:46)
	at com.xxl.job.core.thread.ExecutorRegistryThread$1.run(ExecutorRegistryThread.java:48)
	at java.lang.Thread.run(Thread.java:750)
