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From Sami Sierla <sami.sie...@poplatek.fi>
Subject Re: CouchDB 1.2.0 indexing dies silently
Date Tue, 05 Jun 2012 10:07:47 GMT
Dave,

Thank You for quick reply. The issues appear in a production environment to which I don't
have access to modify configuration or design documents. Log level at the moment is "error"

Below is a lengthy log dump we got when the os_process_timeout was 5000, after increasing
timeout to 30000 there has been no log entries at all when indexing stops.

-----

[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15656.0>] OS Process Error <0.15657.0>
:: {os_process_error, "OS process timed out."}
[Thu, 31 May 2012 17:42:17 GMT] [error] [emulator] Error in process <0.15656.0> with
exit value: {{nocatch,{os_process_error,"OS process timed out."}},[{couch_os_process,prompt,2},{couch_query_servers,map_doc_raw,2},{couch_view_updater,'-do_maps/3-fun-0-',3},{couch_view_updater,do_maps,3}]}
[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15648.0>] ** Generic server <0.15648.0>
terminating 
** Last message in was {'EXIT',<0.15653.0>,
                           {{nocatch,
                                {os_process_error,"OS process timed out."}},
                            [{couch_os_process,prompt,2},
                             {couch_query_servers,map_doc_raw,2},
                             {couch_view_updater,'-do_maps/3-fun-0-',3},
                             {couch_view_updater,do_maps,3}]}}
** When Server state == {group_state,undefined,<<"mutka_replicated">>,
                         {"/data/mutka/couchdb-index",<<"mutka_replicated">>,
                          {group,
                           <<223,185,95,248,235,18,77,64,18,164,253,96,95,237,
                             204,20>>,
                           nil,<<"_design/transactionA-1.2.0">>,
                           <<"javascript">>,[],
                           [{view,0,0,0,
                             [<<"transactionByPaymentInstrument">>],
                             <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.paymentInstrumentId) { emit([doc.paymentInstrumentId,doc.startTimestamp], null);
} }">>,
                             nil,[],[]},
                            {view,1,0,0,
                             [<<"transactionByTerminal">>],
                             <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.paymentTerminalId) { emit([doc.paymentTerminalId,doc.startTimestamp], null);
} }">>,
                             nil,[],[]},
                            {view,2,0,0,
                             [<<"transactionBySession">>],
                             <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.protocolSessionId) { emit(doc.protocolSessionId,doc.protocolTransactionId);
} }">>,
                             nil,[],[]},
                            {view,3,0,0,
                             [<<"transactionByRayId">>],
                             <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.cId) { emit([-(-doc.cId),doc.startTimestamp], null); } }">>,
                             nil,[],[]}],
                           {[]},
                           nil,0,0,nil,nil}},
                         {group,
                          <<223,185,95,248,235,18,77,64,18,164,253,96,95,237,
                            204,20>>,
                          <0.15650.0>,<<"_design/transactionA-1.2.0">>,
                          <<"javascript">>,[],
                          [{view,0,236439939,0,
                            [<<"transactionByPaymentInstrument">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.paymentInstrumentId) { emit([doc.paymentInstrumentId,doc.startTimestamp], null);
} }">>,
                            {btree,<0.15650.0>,
                             {47573274456,{8694059,[]},257926106},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]},
                           {view,1,236439939,0,
                            [<<"transactionByTerminal">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.paymentTerminalId) { emit([doc.paymentTerminalId,doc.startTimestamp], null);
} }">>,
                            {btree,<0.15650.0>,
                             {47574093427,{33638477,[]},942288018},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]},
                           {view,2,236439939,0,
                            [<<"transactionBySession">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.protocolSessionId) { emit(doc.protocolSessionId,doc.protocolTransactionId);
} }">>,
                            {btree,<0.15650.0>,
                             {47574114746,{9241366,[]},131141244},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]},
                           {view,1,236439939,0,
                            [<<"transactionByTerminal">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.paymentTerminalId) { emit([doc.paymentTerminalId,doc.startTimestamp], null);
} }">>,
                            {btree,<0.15650.0>,
                             {47574093427,{33638477,[]},942288018},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]},
                           {view,2,236439939,0,
                            [<<"transactionBySession">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.protocolSessionId) { emit(doc.protocolSessionId,doc.protocolTransactionId);
} }">>,
                            {btree,<0.15650.0>,
                             {47574114746,{9241366,[]},131141244},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]},
                           {view,3,236433956,0,
                            [<<"transactionByRayId">>],
                            <<"function(doc) { if (doc.objectType == \"ProtocolTransaction\"
&& doc.cId) { emit([-(-doc.cId),doc.startTimestamp], null); } }">>,
                            {btree,<0.15650.0>,
                             {47559121340,{2250018,[]},76590679},
                             #Fun<couch_btree.3.71804109>,
                             #Fun<couch_btree.4.115144917>,
                             #Fun<couch_view.less_json_ids.2>,
                             #Fun<couch_view_group.10.26766604>,snappy},
                            [],[]}],
                          {[]},
                          {btree,<0.15650.0>,
                           {47572622835,[],1061098089},
                           #Fun<couch_btree.3.71804109>,
                           #Fun<couch_btree.4.115144917>,
                           #Fun<couch_btree.5.93788370>,nil,snappy},
                          236439939,0,nil,nil},
                         <0.15653.0>,nil,false,
                         [{{<0.15441.0>,#Ref<0.0.0.182446>},409571621}],
                         <0.15652.0>,false}
** Reason for termination == 
** {os_process_error,"OS process timed out."}
[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15648.0>] {error_report,<0.31.0>,
                       {<0.15648.0>,crash_report,
                        [[{initial_call,
                           {couch_view_group,init,['Argument__1']}},
                          {pid,<0.15648.0>},
                          {registered_name,[]},
                          {error_info,
                           {exit,
                            {os_process_error,"OS process timed out."},
                            [{gen_server,terminate,6},
                             {proc_lib,init_p_do_apply,3}]}},
                          {ancestors,[<0.15647.0>]},
                          {messages,[]},
                          {links,[<0.15650.0>,<0.123.0>]},
                          {dictionary,[]},
                          {trap_exit,true},
                          {status,running},
                          {heap_size,2584},
                          {stack_size,24},
                          {reductions,18059924}],
                         []]}}
[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15441.0>] Uncaught server error: {os_process_error,
<<"OS process timed out.">>}
[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15650.0>] ** Generic server <0.15650.0>
terminating 
** Last message in was {'EXIT',<0.15648.0>, {os_process_error,"OS process timed out."}}
** When Server state == {file,{file_descriptor,prim_file,{#Port<0.2119>,19}}, 47574426987}
** Reason for termination == 
** {os_process_error,"OS process timed out."}
[Thu, 31 May 2012 17:42:17 GMT] [error] [<0.15650.0>] {error_report,<0.31.0>,
                       {<0.15650.0>,crash_report,
                        [[{initial_call,{couch_file,init,['Argument__1']}},
                          {pid,<0.15650.0>},
                          {registered_name,[]},
                          {error_info,
                           {exit,
                            {os_process_error,"OS process timed out."},
                            [{gen_server,terminate,6},
                             {proc_lib,init_p_do_apply,3}]}},
                          {ancestors,[<0.15648.0>,<0.15647.0>]},
                          {messages,[{'EXIT',<0.15652.0>,shutdown}]},
                          {links,[]},
                          {dictionary,[]},
                          {trap_exit,true},
                          {status,running},
                          {heap_size,2584},
                          {stack_size,24},
                          {reductions,27732395236}],
                         []]}}


-Sami
On Jun 5, 2012, at 12:23 PM, Dave Cottlehuber wrote:

> On 5 June 2012 11:13, Sami Sierla <sami.sierla@poplatek.fi> wrote:
>> Hi,
>> 
>> We have a rather large database (about 90 million documents /200GB) running on CouchDB
(1.0.3) and we're now updating it to version 1.2.0 due to view compaction problems (large
view group compactions never finished).
>> 
>> At the moment we are rebuilding (JavaScript) views with 1.2.0 but during this we
have stumbled upon to new problem : indexer processes suddenly just disappear. Initially we
got "OS Process Timeout" -errors to log but after adjusting os_process_timeout to 30secs indexing
still prematurely stops but without any log entry.
>> 
>> Any ideas what might cause this behavior?
>> 
>> CouchDB is running on RHEL 5.8 and is statically linked with SpiderMonkey 1.8.5
>> 
>> 
>> Regards,
>> Sami Sierla / Poplatek Oy / Finland
> 
> Sami,
> 
> Have you anything useful in the couch.log file? Are you able to run
> the view generation in debug mode (might not be possible due to disk
> space constraints  & performance impact).
> 
> Also, if you query the view with ?limit=1&descending=true you'll get
> the last doc that couch successfully processed (I think). Is there
> anything special about that or the subsequent documents? If you
> process the view & those docs manually into node or js.exe directly
> [1] does that work?
> 
> There's quite a few changes in 1.0.3 -> 1.2.0 including better
> detection of ill-formed docs amongst others, more info will help
> narrow this down.
> 
> A+
> Dave
> 
> [1]: http://wiki.apache.org/couchdb/Troubleshooting#Map.2BAC8-Reduce_debugging


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