Hi.  I notice the error. (Removed customer-specific data and replaced with "customer_data".)
May 2, 2012 2:56:17 PM com.jdedwards.mgmt.targets.oas.OAS1013$OASComponent redeployEAR
INFO: Redeploying 'D:\jde_home\SCFHA\targets\customer_data\webclient.ear' with application name 'customer_data' to OC4J instance 'customer_data' in OAS instance 'customer_data'.
May 2, 2012 2:56:17 PM com.jdedwards.mgmt.targets.oas.OAS1013 getOasObjectState
FINER: The managed instance 'customer_data' determined the state for object 'ias:j2eeType=J2EEServer,name=JAS_PY900,J2EEServerGroup=default_group,ASInstance=customer_data' as '1'.
May 2, 2012 2:56:20 PM com.jdedwards.mgmt.targets.oas.OAS1013$OASComponent redeployEAR
WARNING: Failed to redeploy 'D:\jde_home\SCFHA\targets\customer_data\webclient.ear' with application name 'customer_data' to OC4J instance 'customer_data' in OAS instance 'Elsenoucy_OAS_JDE_Tr91':  Redeploy error: Redeploy failed: Unable to redeploy: application customer_data does not exist!
May 2, 2012 2:56:20 PM com.jdedwards.mgmt.targets.webserver.WebServer changeComponentWithUserName

Are you using OAS?  Note that beginning TR 9.1, OAS is not a supported Web Server.  You should either use Oracle Weblogic or IBM WebSphere. 
Refer to JD Edwards EnterpriseOne Current MTR Index (Doc ID 747323.1) > Web Servers.