Large xml import to wordpress. error with varnish.

Large xml import to wordpress. error with varnish.

Cancelled

Job Description

We are trying to import a wordpress xml file that is 130mb. but we get

"Error 503 Service Unavailable
Guru Meditation:
XID: 775633266 (sometime we get different XID numbers like XID781062463
Varnish cache server"

we have already tried breaking up the xml file into very small pieces 0,5mb but still the same problem it seems like the connection is killed after 80seconds.

we need urgent help with this are you the right person for this? you should have great skills in linux centos, apache, mysql, php, varnish, wordpress. and really you should have great skills because we dont have any user interface on our dedicated servers.
the servers host several wordpress multisite and its a bit over 15 000 sites on the server so your job should not affect the traffic at all.

Regards Heydar