我需要在应用程序中实现集群机制。这样做时启动jbossAS7时出现错误，错误是：
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JBoss Bootstrap Environment
JBOSS_HOME: /home/chandrashekar/CHE/SoftWares/jboss-as-7.1.1.Final
JAVA: java
JAVA_OPTS: -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Dorg.jboss.resolver.warning=true -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Djboss.domain.default.config=domain.xml -Djboss.host.default.config=host.xml
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19:18:52,599 INFO [org.jboss.modules] (main) JBoss Modules version 1.1.1.GA
19:18:52,688 INFO [org.jboss.as.process.Host Controller.status] (main) JBAS012017: Starting process 'Host Controller'
[Host Controller] 19:18:53,082 INFO [org.jboss.modules] (main) JBoss Modules version 1.1.1.GA
[Host Controller] 19:18:53,196 INFO [org.jboss.msc] (main) JBoss MSC version 1.0.2.GA
[Host Controller] 19:18:53,251 INFO [org.jboss.as] (MSC service thread 1-3) JBAS015899: JBoss AS 7.1.1.Final "Brontes" starting
[Host Controller] 19:18:54,070 ERROR [org.jboss.as.controller.management-operation] …