View query returns unknown_error {"error":"unknown_error","reason":"undef"} when one node is failed over, but not removed completely

test:-
test_load_data_get_view_x_mins_y_design_docs,num-design-docs=25,load-time=10,run-view-time=2,num-tries=100

25 design docs, continuous mutation, parallel query on 25 design docs.

All Design Docs have the following map function:-

{"_id":"_design/dev_test_view_on_10000_docs-1f75728","_rev":"1-b9cf93a0","language":"javascript","views":{"dev_test_view_on_10000_docs-1f75728":{"map":"function (doc) {if(doc.name.indexOf(\"dev_test_view_on_10000_docs-1f75728\") != -1) { emit(doc.name, doc);}}"}}}

Query:-
http://10.1.2.94:8091/couchBase/default/_design/dev_test_view_on_10000_docs-07fc776/_view/dev_test_view_on_10000_docs-07fc776?limit=0&connection_timeout=60000&full_set=true

From the logs:-

Uncaught error in HTTP request:

{error, undef}

[couchdb:info] [2012-02-14 12:32:07] [ns_1@10.1.2.94:<0.20993.3>:couch_log:info:39] Stacktrace: [

{nil, write_chunk, [<<"\r\n]">>]}

,

{couch_httpd, send_chunk, 2}

,

{couch_httpd_view_merger, http_sender, 2}

,

{couch_index_merger, collect_row_count, 6}

,

{couch_index_merger, do_query_index, 4}

,

{couch_index_merger, query_index_loop, 5}

,

{capi_view, design_doc_view_loop, 5}

,

{couch_httpd, handle_request_int, 6}

]