jboss出错，请教原因及解决方案

我们发布的网站用JBOSS，启动的时候出现一些错误，但网站能正常访问下面是部分错误日志。另外，有时候我们把JBOSS作为服务运行时访问不了网站，而用run.bat时却又正常了，并且只是有时出现这个问题。请熟悉JBOSS的帮分析一下，谢谢！
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2005-08-08 15:41:34,423 DEBUG [org.jboss.resource.RARDeployer] looking for nested deployments in : file:/E:/jboss-3.2.6/server/default/deploy/jboss-xa-jdbc.rar
2005-08-08 15:41:34,423 DEBUG [org.jboss.resource.RARDeployer] nested deployment: file:/E:/jboss-3.2.6/server/default/tmp/deploy/tmp53359jboss-xa-jdbc.rar-contents/jboss-xa-jdbc.jar
2005-08-08 15:41:34,423 DEBUG [org.jboss.management.j2ee.LocalJBossServerDomain] handleNotification: javax.management.Notification[source=jboss.jca:service=RARDeployer,type=org.jboss.deployment.SubDeployer.init,sequenceNumber=6,timeStamp=1123486894423,message=null,userData=org.jboss.deployment.DeploymentInfo@f1c0cffa { url=file:/E:/jboss-3.2.6/server/default/deploy/jboss-xa-jdbc.rar }
  deployer: org.jboss.resource.RARDeployer@b20352
  status: null
  state: INIT_DEPLOYER
  watch: file:/E:/jboss-3.2.6/server/default/deploy/jboss-xa-jdbc.rar
  lastDeployed: 0
  lastModified: 0
  mbeans:
]
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2005-08-08 15:41:34,626 DEBUG [org.jboss.jdbc.HypersonicDatabase] Starting jboss:service=Hypersonic,database=localDB
2005-08-08 15:41:34,782 ERROR [org.jboss.jdbc.HypersonicDatabase] Starting failed jboss:service=Hypersonic,database=localDB
java.sql.SQLException: General error: java.lang.NullPointerException
at org.hsqldb.jdbc.jdbcUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.jdbcConnection.<init>(Unknown Source)
at org.hsqldb.jdbcDriver.getConnection(Unknown Source)
at org.hsqldb.jdbcDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
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2005-08-08 15:41:43,641 DEBUG [org.jboss.mx.modelmbean.ModelMBeanInvoker] No persistence-manager descriptor found, null persistence will be used
2005-08-08 15:41:43,641 DEBUG [org.jboss.management.j2ee.Servlet] postRegister(), parent: jboss.management.local:J2EEApplication=null,J2EEServer=Local,j2eeType=WebModule,name=mz.war
2005-08-08 15:41:43,641 INFO  [org.jboss.management.j2ee.Servlet] Registration is not done -> stop
2005-08-08 15:41:43,641 DEBUG [org.jboss.management.j2ee.Servlet] Could not create JSR-77 Servlet: jboss.web:j2eeType=Servlet,name=jsp,WebModule=//www.mianzhi.net/,J2EEApplication=none,J2EEServer=none
javax.management.InstanceAlreadyExistsException: jboss.management.local:J2EEApplication=null,J2EEServer=Local,WebModule=mz.war,j2eeType=Servlet,name=jsp already registered.
at org.jboss.mx.server.registry.BasicMBeanRegistry.add(BasicMBeanRegistry.java:704)
at org.jboss.mx.server.registry.BasicMBeanRegistry.registerMBean(BasicMBeanRegistry.java:212)