views dont return any results ( couchdb fails to open the database doc )

[couchdb:info] [2012-06-18 13:47:01] [ns_1@10.1.2.68:<0.16091.21>:couch_log:info:39] Updater reading changes from active partitions to update main set view group `_design/dev_test_view_on_1000_docs-f0cb556` from set `default`
[couchdb:info] [2012-06-18 13:47:01] [ns_1@10.1.2.68:<0.16091.21>:couch_log:error:42] Set view `default`, main group `_design/dev_test_view_on_1000_docs-f0cb556`, doc loader error
error: {badmatch,eof}
stacktrace: [{couch_db,open_doc_int,3},
             {couch_set_view_updater,load_doc,4},
             {couch_set_view_updater,'-load_changes/7-fun-0-',6},
             {couch_btree,stream_kv_node2,8},
             {couch_btree,fold,4},
             {couch_db,enum_docs_since,5},
             {couch_db,fast_reads,2},
             {couch_set_view_updater,'-load_changes/7-fun-2-',6}]