With Mesos 0.21.0, I am able to use https://www.google.com/webhp as a URI in the fetcher and have it fetched. In 0.22, I am no longer able to do that and get an error in the task's stdout:
I1202 00:47:12.235622 3107 fetcher.cpp:209] Fetching URI 'https://www.google.com/webhp'
I1202 00:47:12.235786 3107 fetcher.cpp:121] Fetching URI 'https://www.google.com/webhp' with os::net
I1202 00:47:12.235802 3107 fetcher.cpp:131] Downloading 'https://www.google.com/webhp' to '/tmp/mesos/slaves/20141201-220145-831784970-5050-2007-S583/frameworks/20141201-215833-831784970-5050-2853-0000/executors/fail.c0a21e7a-79bc-11e4-b7ef-56847afe9799/runs/ed4afcf8-45f2-4033-a3ab-6c25ed93d91e/webhp'
E1202 00:47:12.358072 3107 fetcher.cpp:134] Error downloading resource: Problem with the SSL CA cert (path? access rights?)
Failed to fetch: https://www.google.com/webhp
Failed to synchronize with slave (it's probably exited)