This is not going away:
rollbackFailedOptional: verb npm-session xxxxxxxxx
All common online solutions don't seem to be effective. Have tried a few.
- cache clear (with force flag)
- verify cache
- restart machine
- remove proxy
- remove http proxy
I'm not sure if it is a bug, because installations seem to working well.
May be it is a feature. (Can goto the npm repo and search for the term... will may be do it later, if this thing starts interfering with work )
Snippet from verbose invocation of install:
npm verb npm-session cce7ad32c4aca9a1