Compaction seems to be stuck (or not running)

Quoting Sharon's:

"Troubleshooting, I found many nodes where disk size was 4 times greater then on other nodes.
 
Looking at one of these nodes where data is not compacted,
Compaction seems to be stuck.
 
http://50.18.98.4:8092/default%2F101
{"db_name":"default/101","doc_count":1807,"doc_del_count":0,"update_seq":2986,"purge_seq":0,"compact_running":false,"disk_size":4452469,"data_size":922673,"instance_start_time":"1328040896372522","disk_format_version":7,"committed_update_seq":2985}
 
Cluster is at http://50.18.98.4:8091 (Administrator/password)"


> Quoting Allaksey
The cause of compaction daemon hang is the same as of views hangs. So
generally this is the same bug.