[dtest] snapshot_test hung on 2.1

11:57:44 dont_test_archive_commitlog (snapshot_test.TestArchiveCommitlog) ... Requested creating snapshot(s) for [ks] with snapshot name [basic]
11:58:03 Snapshot directory: basic
11:58:41 Established connection to initial hosts
11:58:41 Opening sstables and calculating sections to stream
11:58:41 Streaming relevant part of /tmp/tmpgTsloD/ks/cf/ks-cf-ka-1-Data.db to [/127.0.0.1]
11:58:41 
progress: [/127.0.0.1]0:1/1 100% total: 100% 0  MB/s(avg: 0 MB/s)
progress: [/127.0.0.1]0:1/1 100% total: 100% 0  MB/s(avg: 0 MB/s)
11:58:42 Summary statistics: 
11:58:42    Connections per host:         : 1         
11:58:42    Total files transferred:      : 1         
11:58:42    Total bytes transferred:      : 527659    
11:58:42    Total duration (ms):          : 2384      
11:58:42    Average transfer rate (MB/s): : 0         
11:58:42    Peak transfer rate (MB/s):    : 0         
11:58:42 
11:58:59 ok
11:58:59 test_archive_commitlog (snapshot_test.TestArchiveCommitlog) ... rm: cannot remove `/tmp/tmp6c0qNr/*': No such file or directory
12:14:15 Build timed out (after 15 minutes). Marking the build as aborted.