Hello,
Pavan, installing a JAVA stack on a server where an ABAP stack is already installed does not turn the system into a dual stack !
Dual stack systems can only be installed in one pass as they are sharing the same SID...
Installing a java stack on a system where there is already an ABAP stack is fully supported.
Did you check the sizing of the shared memory segments using pfpar ?
sappfpar check pf=/sapmnt/<SID>/profile/<SID>_DVEBMGS<system number>_<hostname>
Cleanipc does not clean all semaphores and shared mem segmts, you can double check as root using ipcs / ipcrm.
Stop all SAP instances & process, and check if there are IPC still used by SAP
ipcs | grep sap
m 109052926 0x00002717 --rw-r----- qasadm sapsys
s 10485768 0x00004e3e --ra-r----- qasadm sapsys
Then clean these entries using ipcrm with different option depending if it is a semaphore (s) or a shared mem (m)
ipcrm -M 0x00002717
ipcrm -S 0x00004e3e
Regards