I replicated a database (continuously), but ended up with fewer
documents in the target than in the source. Even if I wait,
the remaining documents don't appear.
1. Here's the DB entry on the source machine, showing 12 documents:
{"db_name":"library","update_seq":"61-g1AAAAFTeJzLYWBg4MhgTmEQTM4vTc5ISXLIyU9OzMnILy7JAUoxJTIkyf___z8rkQGPoiQFIJlkD1bHjE-dA0hdPFgdIz51CSB19WB1BnjU5bEASYYGIAVUOh-_mRC1CyBq9-P3D0TtAYja-1mJbATVPoCoBbqXKQsA-0Fvaw","sizes":{"file":181716,"external":11524,"active":60098},"purge_seq":0,"other":{"data_size":11524},"doc_del_count":0,"doc_count":12,"disk_size":181716,"disk_format_version":6,"data_size":60098,"compact_running":false,"instance_start_time":"0"}
2. Here's the DB entry on the target machine, showing 6 documents:
{"db_name":"library","update_seq":"6-g1AAAAFTeJzLYWBg4MhgTmEQTM4vTc5ISXLIyU9OzMnILy7JAUoxJTIkyf___z8rkQGPoiQFIJlkD1bHhE-dA0hdPFgdIz51CSB19QTV5bEASYYGIAVUOh-_GyFqF0DU7idG7QGI2vvEqH0AUQvyfxYA1_dvNA","sizes":{"file":82337,"external":2282,"active":5874},"purge_seq":0,"other":{"data_size":2282},"doc_del_count":0,"doc_count":6,"disk_size":82337,"disk_format_version":6,"data_size":5874,"compact_running":false,"instance_start_time":"0"}
3. Here's _active_tasks for the task, converted to YAML for readability:
- changes_pending: 0
checkpoint_interval: 30000
checkpointed_source_seq: 61-g1AAAAJTeJyd0EsOgjAQBuAqxsfSE-gRKK08VnIT7UwhSBAWyl
pvojfRm-hNsLQkbAgRNtOkk__L5M8IIcvEkmSNRYmJhDArUGRJcblmajUVBDZVVaWJJchZfSwAucPQkW
RV5jKKT3kke-KwVRP2jWBpgdMAwcOuTJ8U1tKhkSZaYhS5x2GodKylWyPZWnJ9QW3KBkr5TE1yV4_CHu
1dMeyQ-c4o7Wm0V9u4F9setaM_GzfK2yifWplrxYeAcuGOuulrNN3X1PTFgXPqd-XSHxdwuSQ
continuous: !!perl/scalar:JSON::PP::Boolean 1
database: shards/00000000-1fffffff/_replicator.1489086006
doc_id: 172.16.100.222_library
doc_write_failures: 0
docs_read: 12
docs_written: 12
missing_revisions_found: 12
node: couchdb@localhost
pid: <0.5521.0>
replication_id: c60427215125bd97559d069f6fb3ddb4+continuous+create_target
revisions_checked: 12
source: http://172.16.100.222:5984/library/
source_seq:
61-g1AAAAJTeJyd0EsOgjAQBuAqxsfSE-gRKK08VnIT7UwhSBAWylpvojfRm-hNsLQkbAgRNtOkk__L5M8IIcvEkmSNRYmJhDArUGRJcblmajUVBDZVVaWJJchZfSwAucPQkWRV5jKKT3kke-KwVRP2jWBpgdMAwcOuTJ8U1tKhkSZaYhS5x2GodKylWyPZWnJ9QW3KBkr5TE1yV4_CHu1dMeyQ-c4o7Wm0V9u4F9setaM_GzfK2yifWplrxYeAcuGOuulrNN3X1PTFgXPqd-XSHxdwuSQ
started_on: 1489086008
target: http://localhost:5984/library/
through_seq:
61-g1AAAAJTeJyd0EsOgjAQBuAqxsfSE-gRKK08VnIT7UwhSBAWylpvojfRm-hNsLQkbAgRNtOkk__L5M8IIcvEkmSNRYmJhDArUGRJcblmajUVBDZVVaWJJchZfSwAucPQkWRV5jKKT3kke-KwVRP2jWBpgdMAwcOuTJ8U1tKhkSZaYhS5x2GodKylWyPZWnJ9QW3KBkr5TE1yV4_CHu1dMeyQ-c4o7Wm0V9u4F9setaM_GzfK2yifWplrxYeAcuGOuulrNN3X1PTFgXPqd-XSHxdwuSQ
type: replication
updated_on: 1489096815
user: peer
4. Here's the _replicator record for the task:
{"_id":"172.16.100.222_library","_rev":"2-8e6cf63bc167c7c7e4bd38242218572c","schema":1,"storejson":null,"source":"http://172.16.100.222:5984/library","target":"http://localhost:5984/library","create_target":true,"dont_storejson":1,"wholejson":{},"user_ctx":{"roles":["_admin"],"name":"peer"},"continuous":true,"owner":null,"_replication_state":"triggered","_replication_state_time":"2017-03-09T19:00:08+00:00","_replication_id":"c60427215125bd97559d069f6fb3ddb4"}
There should have been no conflicting transactions on the target host.
The appearance of "61-*" in through_seq of the _active_tasks entry
gives me a false sense of security; I only noticed the missing documents
by chance.
A fresh replication to a different target succeeded without any
missing documents.
Is there anything here that would tip me off that the target wasn't
in sync with the source? Is there a good way to resolve the condition?
Thanks,
Christopher
