92% chunk asset optimization Killed

[dipenpatel235]

• I'm submitting a ...
  [ ] bug report

• What is the current behavior?
  npm install successfully then starting using npm start and getting below error when it reach 92%
  then it is killed

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem
  [root@spare frontend]# npm start

ng2-admin@1.0.0 start /root/cloudref/frontend
ng serve
** NG Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200 **
92% chunk asset optimization
Killed

• What is the expected behavior?
  Must run successfully - right now it is crash after reach 92%

• Please tell us about your environment:
  node -v v6.14.2
  npm -v 3.10.10
  centos 7 64 bit