ESS - pcui_gp, ess deployment
I am trying to set up the ESS package with an ECC5.0 backend (ABAP stack) and a Sneak Preview Java (WAS 6.4, EP 6.0, SP16) running on two different machines. After reading Siddhartha Jain's article plus tons of postings on this subject I am still not clear on where I have to deploy the two packages ess and pcui_gp:
1) on the ECC system (i.e. one has to install both ABAP and Java stack),
2) on the Portal's underlying J2EE server,
3) either which or
4) some other J2EE server in the system landscape?
Can someone please shed some light on this? I have deployed everything on the Sneak Preview J2EE server (as such correctly as the status in WD Admin suggests) and I am getting long stack traces at at com.sap.pcuigp.xssutils.ccxss.wdp.InternalCcXss which makes me think I might have chosen the wrong machine for deployment..