我的DNS今天早上崩溃了，我不得不刷新所有DNS条目并将域指向正确的IP。在此之后，我所有的 apache 服务和其他服务都按预期恢复。不过不是我的 Java 服务器，它在 DNS 崩溃之前没有任何问题。
现在，每次我尝试运行Java服务器时，都会收到以下错误：
2019-10-18 22:18:45.377:INFO::Thread-0: Logging initialized @111ms
2019-10-18 22:18:45.782:INFO:oejs.Server:Thread-0: jetty-9.2.z-SNAPSHOT
2019-10-18 22:18:45.815:WARN:oejuc.AbstractLifeCycle:Thread-0: FAILED ServerConnector@ddf171d{SSL-HTTP/1.1}{app.domain.com:8081}: java.net.SocketException: Unresolved address
java.net.SocketException: Unresolved address
at sun.nio.ch.Net.translateToSocketException(Net.java:151)
at sun.nio.ch.Net.translateException(Net.java:177)
at sun.nio.ch.Net.translateException(Net.java:183)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:76)
at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:279)
at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:218)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.server.Server.doStart(Server.java:336)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at com.domain.px.WebSocket.run(WebSocket.java:55)
at java.lang.Thread.run(Thread.java:745)
Caused by:
java.nio.channels.UnresolvedAddressException
at sun.nio.ch.Net.checkAddress(Net.java:121)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:209)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:279)
at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:218)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.server.Server.doStart(Server.java:336)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at com.domain.px.WebSocket.run(WebSocket.java:55)
at java.lang.Thread.run(Thread.java:745)
在应用程序的控制台中，我收到以下错误：
WebSocket connection to 'wss://app.domain.com:8081/' failed: Error in connection establishment: net::ERR_CONNECTION_TIMED_OUT
非常感谢对此的任何帮助。
这似乎是DNS传播问题，大约15-20小时后，Java服务器开始正常连接，不再出现Unresolved address错误。