Error message: "Search process did not exit cleanly, exit_code=255, description="exited with code 255". Please look in search.log "

I have deployed search head app from deployer to search head clustering environment.. but while querying any search inside the app.. it is showing error "Search process did not exit cleanly, exit_code=255, description="exited with code 255". Please look in search.log for this peer in the Job Inspector for more info." inside search log :- ERROR dispatchRunner - RunDispatch::runDispatchThread threw error: Application does not exist: new_app Note : same app is working fine in Testing environment. but when deployed to prod it is showing above error.