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From Tommy Chheng <tommy.chh...@gmail.com>
Subject OS process timed out?
Date Wed, 22 Jul 2009 00:08:08 GMT
Hi,
I'm running couchdb on a small EC2 instance and I've been getting a  
lot of these "OS Process timed out" errors when querying views.  The  
view is returning a set of word counts for a document. The view runs  
fine on my 2 yr old macbook pro.

Im using Ubuntu 8.10 intrepid AMI built by Eric Hammond from http://alestic.com 
.
The erlang version on EC2 is:
Erlang (BEAM) emulator version 5.6.3 [source] [async-threads:0]  
[kernel-poll:false]

There are only 232 documents in the database. It fails 50% of the  
time. Any thoughts on debugging? My erlang skills are n00b at the  
moment.

In the log file, the query is like this when it's successful:
[Tue, 21 Jul 2009 23:57:45 GMT] [info] [<0.2834.0>] 127.0.0.1 - -  
'GET' /nsf_grants/_design/NsfGrant/_view/by_doc_word_count? 
reduce=true&startkey=%5B%220832603%22%5D&endkey=%5B%220832603%22%2C%7B 
%7D%5D&group=true 200

but like this when it gives an error:
[Tue, 21 Jul 2009 23:57:45 GMT] [error] [<0.2804.0>] Uncaught error in  
HTTP request: {exit,
                                  {{bad_return_value,
                                    {os_process_error,"OS process  
timed out."}},
                                   {gen_server,call,
                                    [<0.2808.0>,
                                     {prompt,
                                      [<<"reduce">>,
                                       [<<"function(keys, values,  
rereduce) {\n     return sum(values);\n   }">>],
                                       [[[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1],
                                        [[[<<"0832603">>,<<"and">>],
                                          <<"0832603">>],
                                         1]]]},
                                     infinity]}}}

[Tue, 21 Jul 2009 23:57:45 GMT] [error] [<0.2829.0>] Uncaught error in  
HTTP request: {exit,
                                  {{bad_return_value,
                                    {os_process_error,"OS process  
timed out."}},
                                   {gen_server,call,
                                    [<0.2802.0>,
                                     {prompt,
                                      [<<"reduce">>,
                                       [<<"function(keys, values,  
rereduce) {\n     return sum(values);\n   }">>],
                                        
[[[[<<"0832603">>,<<"interacting">>],
                                          <<"0832603">>],
                                         1]]]},
                                     infinity]}}}

[Tue, 21 Jul 2009 23:57:45 GMT] [info] [<0.2801.0>] 127.0.0.1 - -  
'GET' /nsf_grants/_design/NsfGrant/_view/by_doc_word_count? 
reduce=true&startkey=%5B%220832603%22%5D&endkey=%5B%220832603%22%2C%7B 
%7D%5D&group=true 500

[Tue, 21 Jul 2009 23:57:45 GMT] [info] [<0.2814.0>] 127.0.0.1 - -  
'GET' /nsf_grants/_design/NsfGrant/_view/by_doc_word_count? 
reduce=true&startkey=%5B%220808605%22%5D&endkey=%5B%220808605%22%2C%7B 
%7D%5D&group=true 500


--
Thanks,
Tommy

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