This will require a DB recovery (automatic) upon restart!
Use the hdbcons utility (as <sid>adm) to first activate the crash functionality, then invoke the crash:
Inside the indexserver trace file (from diagnosis view in HANA Studio), you will be able to see the following text towards the end of the file "ExternalCommandHandler.cpp (00958) NOTE: INTENTIONAL CRASH: errorExitWithoutCrashdump".
Once the restart is complete, you can verify that recovery was required from the indexserver trace file:
"LoggerImpl.cpp(00933) : Replayed 130944B (0MB) of log in 17.4729 seconds; 0.00714693MB/s; max known TID=50175"