Couch DB giving a weird exception on view changes - couchdb

Question

I have couch views running on my local database. By some strange quirks one of the view started sending an error report with the following content.
{error_report,<0.31.0>,
{<0.11889.0>,crash_report,
[[{initial_call,{couch_file,init,['Argument__1']}},
{pid,<0.11889.0>},
{registered_name,[]},
{error_info,
{exit,
{{badmatch,{error,eacces}},
[{couch_file,init,1},
{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]},
[{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]}},
{ancestors,[<0.11888.0>,<0.11887.0>]},
{messages,[]},
{links,[#Port<0.5466>,<0.11888.0>]},
{dictionary,[]},
{trap_exit,true},
{status,running},
{heap_size,377},
{stack_size,24},
{reductions,575}],
[{neighbour,
[{pid,<0.11887.0>},
{registered_name,[]},
{initial_call,{erlang,apply,2}},
{current_function,{proc_lib,sync_wait,2}},
{ancestors,[]},
{messages,[]},
{links,[<0.11869.0>,<0.11888.0>]},
{dictionary,[]},
{trap_exit,false},
{status,waiting},
{heap_size,233},
{stack_size,8},
{reductions,15}]},
{neighbour,
[{pid,<0.11888.0>},
{registered_name,[]},
{initial_call,{couch_index,init,['Argument__1']}},
{current_function,{proc_lib,sync_wait,2}},
{ancestors,[<0.11887.0>]},
{messages,
[{ack,<0.11889.0>,
{error,
{{badmatch,{error,eacces}},
[{couch_file,init,1},
{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]}}}]},
{links,[<0.11887.0>,<0.11889.0>]},
{dictionary,[]},
{trap_exit,false},
{status,runnable},
{heap_size,4181},
{stack_size,33},
{reductions,1748}]}]]}}
[error] [<0.11869.0>] ** Generic server couch_index_server terminating
** Last message in was {'EXIT',<0.11887.0>,
{{badmatch,{error,eacces}},
[{couch_file,init,1},
{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]}}
** When Server state == {st,"/var/lib/couchdb/1.3.0"}
** Reason for termination ==
** {{badmatch,{error,eacces}},
[{couch_file,init,1},{gen_server,init_it,6},{proc_lib,init_p_do_apply,3}]}
[Mon, 30 Sep 2013 06:03:40 GMT] [error] [<0.11869.0>] {error_report,<0.31.0>,
{<0.11869.0>,crash_report,
[[{initial_call,
{couch_index_server,init,['Argument__1']}},
{pid,<0.11869.0>},
{registered_name,couch_index_server},
{error_info,
{exit,
{{badmatch,{error,eacces}},
[{couch_file,init,1},
{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]},
[{gen_server,terminate,6},
{proc_lib,init_p_do_apply,3}]}},
{ancestors,
[couch_secondary_services,couch_server_sup,
<0.32.0>]},
{messages,[]},
{links,[<0.11870.0>,<0.8687.0>]},
{dictionary,[]},
{trap_exit,true},
{status,running},
{heap_size,987},
{stack_size,24},
{reductions,495}],
[{neighbour,
[{pid,<0.11870.0>},
{registered_name,[]},
{initial_call,
{couch_event_sup,init,['Argument__1']}},
{current_function,{gen_server,loop,6}},
{ancestors,
[couch_index_server,
couch_secondary_services,
couch_server_sup,<0.32.0>]},
{messages,[]},
{links,[<0.11869.0>,<0.8682.0>]},
{dictionary,[]},
{trap_exit,false},
{status,waiting},
{heap_size,233},
{stack_size,9},
{reductions,32}]}]]}}
[Mon, 30 Sep 2013 06:03:40 GMT] [error] [<0.8687.0>] {error_report,<0.31.0>,
{<0.8687.0>,supervisor_report,
[{supervisor,{local,couch_secondary_services}},
{errorContext,child_terminated},
{reason,
{{badmatch,{error,eacces}},
[{couch_file,init,1},
{gen_server,init_it,6},
{proc_lib,init_p_do_apply,3}]}},
{offender,
[{pid,<0.11869.0>},
{name,index_server},
{mfargs,{couch_index_server,start_link,[]}},
{restart_type,permanent},
{shutdown,brutal_kill},
{child_type,worker}]}]}}
[Mon, 30 Sep 2013 06:03:40 GMT] [error] [<0.11069.0>] Uncaught error in HTTP request: {exit,
{{{badmatch,
{error,eacces}},
[{couch_file,init,1},
{gen_server,
init_it,6},
{proc_lib,
init_p_do_apply,
3}]},
{gen_server,call,
[couch_index_server,
{get_index,
{couch_mrview_index,
{mrst,
<<117,203,135,163,
183,160,137,85,
158,17,190,127,
58,84,144,172>>,
nil,undefined,
<<"kri008">>,
<<"_design/order">>,
<<"javascript">>,
[],
{[]},
[{mrview,0,0,0,
[<<"getAllOpen">>],
[],
--------------------------------------------------------
[Mon, 30 Sep 2013 06:03:40 GMT] [info] [<0.11069.0>] Stacktrace: [{gen_server,call,3},
{couch_index_server,get_index,4},
{couch_mrview_util,get_view,4},
{couch_mrview,query_view,6},
{couch_httpd,etag_maybe,2},
{couch_mrview_http,design_doc_view,5},
{couch_httpd_db,do_db_req,2},
{couch_httpd,handle_request_int,5}]
To fix this all I did was, I updated the view source code by adding a space after a semicolon and error disappears. Adding a space or any character that does not violate JavaScript syntax (i.e. adding a letter to a comment in the view source code) will resume the above error and Couch DB returns data. If I revert the change, it will again start giving the above error. Unfortunately the change I do to drive out this error has no point. I tried restarting Couch DB and also checked the permissions for Couchdb .couch files. Any help will be appreciated.
Update: This is the view content I used to fetch the dataset from the DB
function(doc) {
if (doc.documentType == 'com.acme.Order' && (doc.lock != null)) {
emit(doc.documentObject.createdTime, doc);
}
}

Answer 1

Ok, let me take a wild guess. Are your documents rather big objects? I think you might be running into the timeout of the view server performing the mapdoc. I'd try changing your view not to emit the document as a value and retry, like this:
-emit(doc.documentObject.createdTime, doc);
+emit(doc.documentObject.createdTime, null);
This will save you a lot of disk space for the view index file and you will make it faster way faster to create.
To get the document bodies add include_docs=true to your view query.