Shipper log with filebeat on windows sv 2008

i using filebeat (lastest version) for shipping log IIS on windows server 2008.

I testing with IIS log file large (5GB). but i don't see log on ES ( don't create new indices becasue in config filebeat, i set new indices name - output Logstash). I wait 3 hours and recheck but don't have log on ES.
I try to with IIS log file smaller ( 15MB) and check on ES and see new Indices created. => Filebeat is working.

But don't understand , why not shipping large file ....

Can you provide the information requested here for debugging the issue? Beats: How to report an issue