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https://issues.apache.org/jira/browse/COUCHDB-1902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Newson closed COUCHDB-1902.
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Resolution: Not A Problem
root cause was the known durability gap from delayed_commits=true.
> Success (201) response from Couchdb and document not created
> ------------------------------------------------------------
>
> Key: COUCHDB-1902
> URL: https://issues.apache.org/jira/browse/COUCHDB-1902
> Project: CouchDB
> Issue Type: Bug
> Components: HTTP Interface
> Reporter: Atif Rasheed
>
> We are using Tangerine for early grade assessments which basically is a
> couchapp. One of our field engr reported that he was doing assessments and he
> had saved almost 9 results when all of a sudden tablet went off (probably due
> to batter issue). He powered it up again and after login to Tangerine he
> realized that all those saved results are gone.
> We took logs and database from Tablet to PC for further analysis. We realized
> that it's actually true as we can see those attempts in couch.log and we can
> also see successful HTTP PUT requests as well on same _id's. Now we took that
> data from couch.log and tried to push it manually (using Restful client) to
> couchdb; and it worked. Now we are not sure what went wrong when tangerine
> pushed it to couchdb. Steps we followed and relevant outputs are pasted below
> for your reference. Will appreciate if someone help us out here.
> 0) Stage 0:
> We looked into couch.logs and found a successful PUT against a particular
> assessment result which is not available or visible in tangerine application.
> https://f.cloud.github.com/assets/4159723/1237563/744dfd8e-29da-11e3-8338-75c5478a96df.png
> 1) Stage 1:
> Tried to get the same document by id and the couchapp return not_found
> https://f.cloud.github.com/assets/4159723/1237571/9eb12650-29da-11e3-8570-f1f8f22ab4a9.png
> 2) Stage 2:
> Then we manually copied last revision from that log file And posted/pushed
> manually via REST Client to tangerine db (couchdb) and it was successful.
> https://f.cloud.github.com/assets/4159723/1237590/f3429e9c-29da-11e3-832b-05eab3688bca.PNG
> https://f.cloud.github.com/assets/4159723/1237592/f819b2de-29da-11e3-81a8-953f46da7dee.PNG
> Please note that the "_rev" at this stage is 34 because we hard-coded it in
> data file while sending through REST API. Obviously, if we remove that line
> from JSON, The _rev would be 1.
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