During the start-up of the iProcess Engine process all processes would start except the DIRECTOR which would crash and report an error in the sw_error.log:

2018/03/06 09:15:23.995311(PROCMGR:2:1792:2::::pro:/pmstart.c:84973:2303): 1888-The process manager detected that process (LMID = 1, LPN = DIRECTOR, LPI = 1) has terminated abnormally.   Socket error (Unknown error code: 0).

The DIRECTOR .dmp file produced after adding debug,

swadm set_attribute 1 DIRECTOR 0 DEBUG MEMSET,ALL=255,TIME=ABS,FLAGS=U

did not report any specific errors and just ended.

Port range had been configured with the values:

RPC Port ranges:
-------------------------------------------------------------------------
Port Range ID Range Mode  Range Size  Port Start  RPC Start   Server ID's
-------------------------------------------------------------------------
         1                     1                   20             6920        400000          1

TIBCO iProcess Engine (Oracle) 11.6.1 Linux

Increasing the Port Start value to 20000 in order to avoid any issues with low port numbers being already allocated by the operating system enabled the process to start correctly,

swadm mod_range 1 -p 20000

However, during user login the DIRECTOR would still crash with an error in the DIRECTOR_1_stdout file,

ORA-24550: signal received: [si_signo=11] [si_errno=0] [si_code=1] [si_int=0] [si_ptr=(nil)] [si_addr=0xff]
kpedbg_dmp_stack()+404<-kpeDbgCrash()+210<-kpeDbgSignalHandler()+122<-skgesig_sigactionHandler()+229<-__sighandler()<-_IO_vfprintf()+5476<-vsprintf()+107<-6E65696C63206465

This was identified as being caused by having a limited stack size. The stack size was set to 8192 (-s value from "ulimit -Sa" output).

The stack size was amended to a value of 32000 which resulted in system stability.

TIBCO iProcess Engine DIRECTOR process crashes on start-up

TIBCO iProcess® Engine Administrator’s Guide Software Release 11.6 January 2016