I tried two files which took about 60 and 150 minutes to download. wget had to retry with partial data several times and completed the downloads after a few retries. A pattern emerges from when you look at the timestamps in the typescript of the wget jobs: apparently, a cron job which seems to run at 17,47 minutes every hour is restarting the web server.
GG
<pre> $ fgrep 2016-08-06 typescript --2016-08-06 09:37:05-- https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-pages-... 2016-08-06 09:47:19 (1.82 MB/s) - Connection closed at byte 1170013869. Retrying. --2016-08-06 09:47:20-- (try: 2) https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-pages-... 2016-08-06 10:17:29 (1.79 MB/s) - Connection closed at byte 4569103660. Retrying. --2016-08-06 10:17:31-- (try: 3) https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-pages-... 2016-08-06 10:27:36 (1.88 MB/s) - ‘commonswiki-20160801-pages-articles.xml.bz2’ saved [5761778656/5761778656] --2016-08-06 14:30:35-- https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-image.... 2016-08-06 14:47:21 (1.92 MB/s) - Connection closed at byte 2025914028. Retrying. --2016-08-06 14:47:22-- (try: 2) https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-image.... 2016-08-06 15:48:01 (1.85 MB/s) - Connection closed at byte 9102130472. Retrying. --2016-08-06 15:48:03-- (try: 3) https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-image.... 2016-08-06 16:17:37 (1.90 MB/s) - Connection closed at byte 12637698981. Retrying. --2016-08-06 16:17:40-- (try: 4) https://dumps.wikimedia.org/commonswiki/20160801/commonswiki-20160801-image.... 2016-08-06 17:06:17 (1.82 MB/s) - ‘commonswiki-20160801-image.sql.gz’ saved [18204308503/18204308503] </pre>