my domain mode was totally fine in a month ago

but when I try to start it again in this week,it gets an error:

ps:this is master server and the ip which could not connect is just belong to the server

[Server:server-one] 11:26:20,081 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-8) MSC00001: Failed to start service jboss.host.controller.client: org.jboss.msc.service.StartException in ser
vice jboss.host.controller.client: java.net.ConnectException: JBAS012144: Could not connect to remote://sunpa-yzl:9999. The connection timed out
[Server:server-one]     at org.jboss.as.server.mgmt.domain.HostControllerServerClient.start(HostControllerServerClient.java:161) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
[Server:server-one]     at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
[Server:server-one]     at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
[Server:server-one]     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [rt.jar:1.6.0_45]
[Server:server-one]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [rt.jar:1.6.0_45]
[Server:server-one]     at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_45]
[Server:server-one] Caused by: java.net.ConnectException: JBAS012144: Could not connect to remote://sunpa-yzl:9999. The connection timed out
[Server:server-one]     at org.jboss.as.protocol.ProtocolChannelClient.connectSync(ProtocolChannelClient.java:155) [jboss-as-protocol-7.1.1.Final.jar:7.1.1.Final]
[Server:server-one]     at org.jboss.as.server.mgmt.domain.HostControllerServerConnection.openChannel(HostControllerServerConnection.java:158) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
[Server:server-one]     at org.jboss.as.server.mgmt.domain.HostControllerServerConnection.connect(HostControllerServerConnection.java:86) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
[Server:server-one]     at org.jboss.as.server.mgmt.domain.HostControllerServerClient.start(HostControllerServerClient.java:135) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
[Server:server-one]     ... 5 more
[Server:server-one]
[Server:server-one] 11:26:20,096 ERROR [org.jboss.as] (MSC service thread 1-8) JBAS015875: JBoss AS 7.1.1.Final "Brontes" started (with errors) in 15881ms - Started 163 of 240 services (1 services fai
led or missing dependencies, 75 services are passive or on-demand)