Hi it may be this:
1-your file may have a problem
2-your file may be very heavy, in this case, be patien. I have had files that took me more than 30 minutes
3- you may have reached your indexing quota.
You are right ! I guess there was some problem with the file. I uploaded some other file and it worked fine.
Thank You !
I had the same issue and realized that the space on the server was less than 5GB (Default 5GB is the free disk space required for indexing to work). I have changed my drive to different ( to D from settings where I have 10GB) but it did not work ( did not try restarting splunk which I should have tried). I uninstalled (as I am trying the splunk on vm) and reinstalled on D and upload worked as expected.