See this iteration.
2015-09-21 21:14:19,208 - sdwdate_log - INFO - Gradually adjusting the time by running sclockadj, PID=1021
2015-09-21 21:14:19,209 - sdwdate_log - INFO - Last run (on Mon Sep 21 21:14:19 UTC 2015) was successful. Sleeping for 10 minutes.
2015-09-21 21:24:19,471 - sdwdate_log - INFO - Fetching remote times, start Mon Sep 21 21:24:19 UTC 2015 (unixtime 1442870659.47)
2015-09-21 21:24:19,472 - sdwdate_log - INFO - The clock is sane. Current time "Mon Sep 21 21:24:19 UTC 2015".
2015-09-21 21:24:19,472 - sdwdate_log - INFO - Running sdwdate loop, iteration 1
2015-09-21 21:24:19,472 - sdwdate_log - INFO - Requested urls ['hkjpnjbvhrxjvikd.onion', '5r4bjnjug3apqdii.onion', 'wi7qkxyrdpu5cmvr.onion']
2015-09-21 21:24:25,268 - sdwdate_log - INFO - Returned urls "['hkjpnjbvhrxjvikd.onion', '5r4bjnjug3apqdii.onion', 'wi7qkxyrdpu5cmvr.onion']"
2015-09-21 21:24:25,269 - sdwdate_log - INFO - Remote status "hkjpnjbvhrxjvikd.onion", False: connect error: 0x04: Host unreachable
2015-09-21 21:24:25,270 - sdwdate_log - INFO - Remote status "5r4bjnjug3apqdii.onion", True
2015-09-21 21:24:25,270 - sdwdate_log - INFO - Remote status "wi7qkxyrdpu5cmvr.onion", True
2015-09-21 21:24:25,270 - sdwdate_log - INFO - Pool 2 last url: 5r4bjnjug3apqdii.onion, web unixtime: 1442870662, web time: Mon Sep 21 21:24:22 UTC 2015, diff: -3 seconds
2015-09-21 21:24:25,270 - sdwdate_log - INFO - Pool 3 last url: wi7qkxyrdpu5cmvr.onion, web unixtime: 1442870662, web time: Mon Sep 21 21:24:22 UTC 2015, diff: -3 seconds
2015-09-21 21:24:25,271 - sdwdate_log - INFO - Running sdwdate loop, iteration 2
2015-09-21 21:24:25,271 - sdwdate_log - INFO - Requested urls ['hkjpnjbvhrxjvikd.onion']
2015-09-21 21:24:30,100 - sdwdate_log - INFO - Returned urls "['hkjpnjbvhrxjvikd.onion']"
2015-09-21 21:24:30,101 - sdwdate_log - INFO - Remote status "hkjpnjbvhrxjvikd.onion", False: connect error: 0x04: Host unreachable
2015-09-21 21:24:30,102 - sdwdate_log - INFO - Running sdwdate loop, iteration 3
2015-09-21 21:24:30,102 - sdwdate_log - INFO - Requested urls ['pubdrop4dw6rk3aq.onion']
2015-09-21 21:24:32,055 - sdwdate_log - INFO - Returned urls "['pubdrop4dw6rk3aq.onion']"
2015-09-21 21:24:32,055 - sdwdate_log - INFO - Remote status "pubdrop4dw6rk3aq.onion", True
2015-09-21 21:24:32,055 - sdwdate_log - INFO - Pool 1 last url: pubdrop4dw6rk3aq.onion, web unixtime: 1442870673, web time: Mon Sep 21 21:24:33 UTC 2015, diff: 1 seconds
2015-09-21 21:24:32,055 - sdwdate_log - INFO - Reachable urls:
5r4bjnjug3apqdii.onion: "Irpileaks[29][30] 2013-October-7 Investigative Journalism 5r4bjnjug3apqdii.onion https://5r4bjnjug3apqdii.tor2web.org/ Italy"
wi7qkxyrdpu5cmvr.onion: "Austici www.autistici.org/en/stuff/man_anon/tor.html"
pubdrop4dw6rk3aq.onion: "ProPublica https://securedrop.propublica.org pubdrop4dw6rk3aq.onion"
2015-09-21 21:24:32,056 - sdwdate_log - INFO - Unreachable urls:
hkjpnjbvhrxjvikd.onion: "Radio24syv https://securedrop.radio24syv.dk hkjpnjbvhrxjvikd.onion"
hkjpnjbvhrxjvikd.onion: "Radio24syv https://securedrop.radio24syv.dk hkjpnjbvhrxjvikd.onion"
2015-09-21 21:24:32,056 - sdwdate_log - INFO - Fetching remote times, end Mon Sep 21 21:24:19 UTC 2015 (unixtime 1442870672.06)
2015-09-21 21:24:32,060 - sdwdate_log - INFO - Pool differences, sorted: [-3, -3, 1]
2015-09-21 21:24:32,061 - sdwdate_log - INFO - Median time difference: -3
2015-09-21 21:24:32,061 - sdwdate_log - INFO - Seconds to add: - 0.674467549
2015-09-21 21:24:32,061 - sdwdate_log - INFO - New time difference: -3.674467549
2015-09-21 21:24:32,064 - sdwdate_log - INFO - Gradually adjusting the time by running sclockadj, PID=1126
2015-09-21 21:24:32,065 - sdwdate_log - INFO - Last run (on Mon Sep 21 21:24:32 UTC 2015) was successful. Sleeping for 10 minutes.
The same unreachable url was tried twice.