OFM Weblogic -- 503 Service Unavailable

I have an up and running weblogic wbich suddenly started failing with Error 503 Service unavailable.

OS is Redhat 6.2

The following steps were observed when restarting the OFM

1.    do opmnctl to start the ohs 2.    Start the web logic        * cd /oracle/product/FR_MWHOME/user_projects/domains/FormsReports        * nohup ./startWebLogic.sh &        * check the nohup.out file for log3.    Start node manager with command as below        * cd /oracle/product/FR_MWHOME/wlserver0.3/server/bin        * nohup ./startNodeManager.sh &        * check the nohup.out file for log4.    logon to weblogic to start the Forms and report

Opmn status is as below:

pcardapp:/oracle/product/FR_MWHOME/user_projects/domains/FormsReports>opmnctl statusProcesses in Instance: FRinst---------------------------------+--------------------+---------+---------ias-component                    | process-type       |     pid | status---------------------------------+--------------------+---------+---------reppwc                           | ReportsServerComp~ |       0 | NONEemagent_FRinst                   | EMAGENT            |     N/A | DownRptSvr_pcardapp_FRinst           | ReportsServerComp~ |     N/A | Downohs1                             | OHS                |    7813 | Alive