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java.lang.IllegalStateException: Already connected	at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3014)	at sun.net.www.protocol.https.HttpsURLConnectionImpl.setRequestProperty(HttpsURLConnectionImpl.java:316)	at org.glassfish.jersey.client.internal.HttpUrlConnector.setOutboundHeaders(HttpUrlConnector.java:421)	at org.glassfish.jersey.client.internal.HttpUrlConnector.access$100(HttpUrlConnector.java:96)	at org.glassfish.jersey.client.internal.HttpUrlConnector$4.getOutputStream(HttpUrlConnector.java:384)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:200)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:194)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:262)	at org.glassfish.jersey.message.internal.OutboundMessageContext.commitStream(OutboundMessageContext.java:816)	at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:545)	at org.glassfish.jersey.client.internal.HttpUrlConnector._apply(HttpUrlConnector.java:388)	at org.glassfish.jersey.client.internal.HttpUrlConnector.apply(HttpUrlConnector.java:285)	at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:255)	at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:684)	at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:681)	at org.glassfish.jersey.internal.Errors.process(Errors.java:315)	at org.glassfish.jersey.internal.Errors.process(Errors.java:297)	at org.glassfish.jersey.internal.Errors.process(Errors.java:228)	at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:444)	at org.glassfish.jersey.client.JerseyInvocation.invoke(JerseyInvocation.java:681)	at org.glassfish.jersey.client.JerseyInvocation$Builder.method(JerseyInvocation.java:437)	at org.glassfish.jersey.client.JerseyInvocation$Builder.post(JerseyInvocation.java:343)	at api.zabbix.ZabbixAPIAccess.getResponse(ZabbixAPIAccess.java:76)	at api.zabbix.ZabbixAPIAccess.getToken(ZabbixAPIAccess.java:82)	at api.zabbix.ZabbixAPIAccess.request(ZabbixAPIAccess.java:41)	at api.zabbix.ZabbixAPIAccess.request(ZabbixAPIAccess.java:51)	at api.zabbix.Main.main(Main.java:24)