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Posted to user@couchdb.apache.org by Jan Lehnardt <ja...@apache.org> on 2017/01/07 18:19:02 UTC
Re: Help with CouchDB log
Hi Ian,
is it possible your database file is corrupted?
Best
Jan
--
> On 30 Dec 2016, at 18:47, Ian Goodacre <Ia...@xtra.co.nz> wrote:
>
> I have a database for which compaction is failing. When I run compaction, I get errors in the CouchDB log like:
>
> [Thu, 29 Dec 2016 16:13:43 GMT] [error] [emulator] Error in process <0.23370.44> with exit value: {function_clause,[{couch_db_updater,'-copy_docs/4-fun-3-',[not_found,{db,nil,<0.23370.44>,nil,<<16 bytes>>,<0.23374.44>,<0.23372.44>,<0.23376.44>,{db_header,6,0,0,nil,nil,nil,1024,79,nil,1000},0,{btree,<0.23372.44>,nil,#Fun<couch_db_updater.10.55895019>,#Fun<couch_db_updater.11.100913286>,#Fun<couch_btree.5.296538>,#Fun<couch_db_updater.12.39068440>,snappy},{btree,<0.23372.44>,nil,#Fun<couch_db_updater.13.114276184>,#Fun<couch_db_updater.14.2340873>,#Fun<couch_btree.5.296538>,#Fun<couch_db_updater.15.23651859>,snappy},{btree,<0.23372.44>,nil,#Fun<couch_btree.3.127739064>,#Fun<couch_btree.4.112272954>,#Fun<couch_btree.5.296538>,nil,snappy},0,<<13 bytes>>,"/var/co...
>
> [Thu, 29 Dec 2016 16:13:43 GMT] [error] [<0.315.0>] ** Generic server <0.315.0> terminating
> ** Last message in was {'EXIT',<0.23370.44>,
> {function_clause,
> [{couch_db_updater,'-copy_docs/4-fun-3-',
> [not_found,
> {db,nil,<0.23370.44>,nil,<<"1483028022969955">>,
> <0.23374.44>,<0.23372.44>,<0.23376.44>,
> {db_header,6,0,0,nil,nil,nil,1024,79,nil,1000},
> 0,
> {btree,<0.23372.44>,nil,
> #Fun<couch_db_updater.10.55895019>,
> #Fun<couch_db_updater.11.100913286>,
> #Fun<couch_btree.5.296538>,
> #Fun<couch_db_updater.12.39068440>,snappy},
> {btree,<0.23372.44>,nil,
> #Fun<couch_db_updater.13.114276184>,
> #Fun<couch_db_updater.14.2340873>,
> #Fun<couch_btree.5.296538>,
> #Fun<couch_db_updater.15.23651859>,snappy},
> {btree,<0.23372.44>,nil,
> #Fun<couch_btree.3.127739064>,
> ...
>
>
> Lots of information here but I don't understand it and I haven't found a description in the documentation.
>
> What is the best way to learn about the structure and content of these log messages? Is there some documentation somewhere?
>
>
--
Professional Support for Apache CouchDB:
https://neighbourhood.ie/couchdb-support/
Re: Help with CouchDB log
Posted by Ian Goodacre <Ia...@xtra.co.nz>.
Hi Jan,
Yes, it is possible my database file is corrupted. My assumption at this
point is that it is corrupted. I have made a copy of the database for
investigation then deleted the original, recreated and repopulated it,
after which all is back to normal for the customer.
I would like to know what exactly is wrong with the misbehaving copy
and, if possible, how it came to be corrupted, how to avoid this
happening in the future and recovery options if/when it does happen
again. To this end, I am now learning a bit about Erlang (I have no
previous experience) and reviewing the CouchDB code. I expect this will
require considerable time and effort. Already the error message seems a
little less obscure but I obviously have a long way to go before I can
really understand what it is telling me. Any pointers to resources to
support this learning would be appreciated.
Regards,
Ian
On 8/01/2017 07:19, Jan Lehnardt wrote:
> Hi Ian,
>
> is it possible your database file is corrupted?
>
> Best
> Jan
> --
>
>> On 30 Dec 2016, at 18:47, Ian Goodacre <Ia...@xtra.co.nz> wrote:
>>
>> I have a database for which compaction is failing. When I run compaction, I get errors in the CouchDB log like:
>>
>> [Thu, 29 Dec 2016 16:13:43 GMT] [error] [emulator] Error in process <0.23370.44> with exit value: {function_clause,[{couch_db_updater,'-copy_docs/4-fun-3-',[not_found,{db,nil,<0.23370.44>,nil,<<16 bytes>>,<0.23374.44>,<0.23372.44>,<0.23376.44>,{db_header,6,0,0,nil,nil,nil,1024,79,nil,1000},0,{btree,<0.23372.44>,nil,#Fun<couch_db_updater.10.55895019>,#Fun<couch_db_updater.11.100913286>,#Fun<couch_btree.5.296538>,#Fun<couch_db_updater.12.39068440>,snappy},{btree,<0.23372.44>,nil,#Fun<couch_db_updater.13.114276184>,#Fun<couch_db_updater.14.2340873>,#Fun<couch_btree.5.296538>,#Fun<couch_db_updater.15.23651859>,snappy},{btree,<0.23372.44>,nil,#Fun<couch_btree.3.127739064>,#Fun<couch_btree.4.112272954>,#Fun<couch_btree.5.296538>,nil,snappy},0,<<13 bytes>>,"/var/co...
>>
>> [Thu, 29 Dec 2016 16:13:43 GMT] [error] [<0.315.0>] ** Generic server <0.315.0> terminating
>> ** Last message in was {'EXIT',<0.23370.44>,
>> {function_clause,
>> [{couch_db_updater,'-copy_docs/4-fun-3-',
>> [not_found,
>> {db,nil,<0.23370.44>,nil,<<"1483028022969955">>,
>> <0.23374.44>,<0.23372.44>,<0.23376.44>,
>> {db_header,6,0,0,nil,nil,nil,1024,79,nil,1000},
>> 0,
>> {btree,<0.23372.44>,nil,
>> #Fun<couch_db_updater.10.55895019>,
>> #Fun<couch_db_updater.11.100913286>,
>> #Fun<couch_btree.5.296538>,
>> #Fun<couch_db_updater.12.39068440>,snappy},
>> {btree,<0.23372.44>,nil,
>> #Fun<couch_db_updater.13.114276184>,
>> #Fun<couch_db_updater.14.2340873>,
>> #Fun<couch_btree.5.296538>,
>> #Fun<couch_db_updater.15.23651859>,snappy},
>> {btree,<0.23372.44>,nil,
>> #Fun<couch_btree.3.127739064>,
>> ...
>>
>>
>> Lots of information here but I don't understand it and I haven't found a description in the documentation.
>>
>> What is the best way to learn about the structure and content of these log messages? Is there some documentation somewhere?
>>
>>