Error on paver when using custom theme in ficus.2

[Anand R.C]

Hi,
I have been using, ficus.2 release and enabled custom theme on it which was working perfectly fine, but suddenly a error started coming up every time i do :

paver update_assets lms --settings=aws

stack trace of the error is:

Successful compilations:
--- "common" sass files.
--- lms sass for <my custom theme dir>.
--- lms sass for system.

python manage.py lms --settings=aws collectstatic --noinput > /dev/null
2017-07-24 04:17:02,266 INFO 13598 [dd.dogapi] dog_stats_api.py:66 - Initializing dog api to use statsd: localhost, 8125
2017-07-24 04:17:05,057 WARNING 13598 [py.warnings] base.py:116 - /edx/app/edxapp/edx-platform/cms/djangoapps/course_creators/models.py:22: RemovedInDjango19Warning: Model class course_creators.models.CourseCreator doesn't declare an explicit app_label and either isn't in an application in INSTALLED_APPS or else was imported before its application was loaded. This will no longer be supported in Django 1.9.
  class CourseCreator(models.Model):

pipeline.exceptions.CompressorError: /bin/sh: 1: node_modules/.bin/uglifyjs: not found



Captured Task Output:
---------------------

---> pavelib.assets.update_assets
---> pavelib.prereqs.install_node_prereqs
xmodule_assets common/static/xmodule
mkdir_p path('common/static/common/js/vendor')
/bin/cp -rf node_modules/backbone-validation/dist/backbone-validation-min.js common/static/common/js/vendor
/bin/cp -rf node_modules/backbone/backbone.js common/static/common/js/vendor
/bin/cp -rf node_modules/backbone.paginator/lib/backbone.paginator.js common/static/common/js/vendor
/bin/cp -rf node_modules/moment-timezone/builds/moment-timezone-with-data.js common/static/common/js/vendor
/bin/cp -rf node_modules/moment/min/moment-with-locales.js common/static/common/js/vendor
/bin/cp -rf node_modules/jquery-migrate/dist/jquery-migrate.js common/static/common/js/vendor
/bin/cp -rf node_modules/jquery.scrollto/jquery.scrollTo.js common/static/common/js/vendor
/bin/cp -rf node_modules/jquery/dist/jquery.js common/static/common/js/vendor
/bin/cp -rf node_modules/picturefill/dist/picturefill.js common/static/common/js/vendor
/bin/cp -rf node_modules/requirejs/require.js common/static/common/js/vendor
/bin/cp -rf node_modules/underscore.string/dist/underscore.string.js common/static/common/js/vendor
/bin/cp -rf node_modules/underscore/underscore.js common/static/common/js/vendor
/bin/cp -rf node_modules/sinon/pkg/sinon.js common/static/common/js/vendor
---> pavelib.assets.compile_coffeescript
node_modules/.bin/coffee --compile `find /edx/app/edxapp/edx-platform/lms /edx/app/edxapp/edx-platform/cms /edx/app/edxapp/edx-platform/common -type f -name "*.coffee"`
python manage.py lms --settings=aws compile_sass lms
python manage.py lms --settings=aws collectstatic --noinput > /dev/null

Build failed running pavelib.assets.update_assets: Subprocess return code: 1

What i understand by this is that ' node_modules/.bin/uglifyjs: not found', so i checked the node_modules/.bin/ i could locate uglifyjs in it so , i really dont know what was causing it.

The paver is working fine once i go and comment the line PIPELINE_UGLIFYJS_BINARY = 'node_modules/.bin/uglifyjs' in lms/envs/common.py file


So can anyone help me out to figure what i could be reason for this.

Thanks in Advance

Anand