aeMonitor /GWMonitor-Japaneseコミュニティーサイト

はじめまして。
GroundWorkMonitorをインストールしたサーバーを再起動して、
GroundWorkMonitorのWebにアクセスすると下記のようなエラーが表示されてしまいます。
再起動前までは問題なく動作していて、特に何か変更を加えたりもしていません。

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HTTPステータス 500 -

type 例外レポート

メッセージ

説明 The server encountered an internal error () that prevented it from fulfilling this request.

例外

javax.servlet.ServletException: java.lang.NullPointerException
org.jboss.portal.server.servlet.PortalServlet.service(PortalServlet.java:278)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

原因

java.lang.NullPointerException
org.jboss.portal.core.impl.model.portal.PersistentPortalObjectContainer.getObjectNode(PersistentPortalObjectContainer.java:252)
org.jboss.portal.core.impl.model.portal.AbstractPortalObjectContainer.getContext(AbstractPortalObjectContainer.java:112)
org.jboss.portal.core.impl.model.portal.AbstractPortalObjectContainer.getContext(AbstractPortalObjectContainer.java:81)
org.jboss.portal.core.model.portal.DefaultPortalCommandFactory.doMapping(DefaultPortalCommandFactory.java:72)
org.jboss.portal.core.controller.Controller.handle(Controller.java:252)
org.jboss.portal.server.RequestControllerDispatcher.invoke(RequestControllerDispatcher.java:51)
org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:131)
org.jboss.portal.common.invocation.Invocation.invoke(Invocation.java:157)
org.jboss.portal.server.servlet.PortalServlet.service(PortalServlet.java:252)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
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またサーバー上でgroundworkのサービスを起動しようとすると、
下記のようにいくつか付随するサービスの起動に失敗してしまいます。
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/usr/local/groundwork/mysql/scripts/ctl.sh : mysqld could not be started; see /usr/local/groundwork/mysql/data/safe_mysqld.log
Syntax OK
/usr/local/groundwork/apache2/scripts/ctl.sh : httpd started at port 80
/usr/local/groundwork/nagios/scripts/ctl.sh: nagios started
/usr/local/groundwork/common/scripts/ctl-syslog-ng.sh : syslog-ng started

JBoss is not running
svscan is not running
dumblogs are not running
supervise is not running
Feeders are not running
nagios2collage_socket is not running
Starting Groundwork Services
Connecting to Foundation listener Host:localhost Port:4913
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener not ready to accept data feeds ....
Listener ready to accept data feeds....
gwservices start [ OK ]
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どなたか解決方法を御教授いただけないでしょうか？