No hipchat notifications received.

Also see this in the logs:
Error posting to HipChat
java.net.UnknownHostException: null
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:618)
at sun.security.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:407)
at sun.security.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:88)
at hudson.util.NoClientBindSSLProtocolSocketFactory.createSocket(NoClientBindSSLProtocolSocketFactory.java:135)
at hudson.util.NoClientBindSSLProtocolSocketFactory.createSocket(NoClientBindSSLProtocolSocketFactory.java:117)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at jenkins.plugins.hipchat.StandardHipChatService.publish(StandardHipChatService.java:48)
at jenkins.plugins.hipchat.ActiveNotifier.notifyStart(ActiveNotifier.java:53)
at jenkins.plugins.hipchat.ActiveNotifier.started(ActiveNotifier.java:46)
at jenkins.plugins.hipchat.HipChatNotifier$HipChatJobProperty.prebuild(HipChatNotifier.java:203)
at hudson.model.AbstractBuild$AbstractBuildExecution.preBuild(AbstractBuild.java:806)
at hudson.model.AbstractBuild$AbstractBuildExecution.preBuild(AbstractBuild.java:801)
at hudson.model.AbstractBuild$AbstractBuildExecution.preBuild(AbstractBuild.java:797)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:532)
at hudson.model.Run.execute(Run.java:1740)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:233)

I tried going into global config and hitting save. Makes no difference, rolling back to 1.6 for now.