If your soa server is up but your soa_infra is down then search for the following error in
$DOMAIN_HOME\servers\soa_server1\logs\soa_server1.log
weblogic.application.ModuleException: Exception preparing module: EJBModule(ejb_ob_engine_wls.jar) Unable to deploy EJB: ejb_ob_engine_wls.jar from ejb_ob_engine_wls.jar: There are 1 nested errors: java.io.IOException: JDT compilation error! FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method getMBeanAttribute(String, String) is undefined for the type FacadeFinderBean_4vacyo_Intf FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method getNumberOfCompositeInstancesByPartitions(String[]) is undefined for the type FacadeFinderBean_4vacyo_Intf FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method listComposites() is undefined for the type FacadeFinderBean_4vacyo_Intf FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method invokeMBeanOperation(String, String, String[], Object[]) is undefined for the type FacadeFinderBean_4vacyo_Intf FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method setMBeanAttribute(String, String, Object) is undefined for the type FacadeFinderBean_4vacyo_Intf FacadeFinderBean_4vacyo_FacadeFinderBeanImpl.java: The method getNumberOfFaultedCompositeInstancesByPartitions(String[]) is undefined for the type FacadeFinderBean_4vacyo_Intf at weblogic.ejb.container.ejbc.CompilerForJDT.compile(CompilerForJDT.java:57) at weblogic.ejb.container.ejbc.EJBCompiler.doCompile(EJBCompiler.java:309) at weblogic.ejb.container.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:485) at weblogic.ejb.container.ejbc.EJBCompiler.compileEJB(EJBCompiler.java:452) at weblogic.ejb.container.deployer.EJBDeployer.runEJBC(EJBDeployer.java:439) at weblogic.ejb.container.deployer.EJBDeployer.compileJar(EJBDeployer.java:779) at weblogic.ejb.container.deployer.EJBDeployer.compileIfNecessary(EJBDeployer.java:679) at weblogic.ejb.container.deployer.EJBDeployer.prepare(EJBDeployer.java:1237) at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:440) ..... .....
Then install the SOA patchset installer (11.1.1.3) on top of your existing SOA suite 11.1.1.2