php - Client error response 499 Client Disconnect on moving files in Rackspace Container -

i executing script copying selected media files 1 container container in rackspace. working last day continuously giving error:

exception in uploading observation media.client error response [status code] 499 [reason phrase] client disconnect [url] https://snet-storage101.lon3.clouddrive.com/v1/mossocloudfs_f448a09c-45b1-4ec3-bcb5-15d9e77c3bea/container-name/media.mp4

i thought client side have set ignore_user_abort(true) , set_time_limit(0). still not working.

if skip media using query stucks in other media files. although can check each media file playing in web. seems rackspace issue. please help