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From "Klaus Trainer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-885) Attachments introduce conflicts after replication.
Date Sun, 14 Nov 2010 23:46:13 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12931923#action_12931923
] 

Klaus Trainer commented on COUCHDB-885:
---------------------------------------

Just read Nikolai's description again. My previous two comments here were maybe beside the
point.

I think that this issue might be related to COUCHDB-902, which is not fixed yet.

The problem in COUCHDB-902 is that a conflict occurs when it shouldn't. I left COUCHDB-902
with a patch for review. Now, I just discovered Filipe's latest comment (on COUCHDB-902) that
I've obviously missed. I find it interesting that what Filipe's saying contradicts what I've
been observing. Anyway, I'll get back to COUCHDB-902 and check again, as soon as I get some
time for that. It should definitely get fixed.

I suggest that we leave this issue open until COUCHDB-902 is fixed, and get back to it then
to see if it's still an issue.

> Attachments introduce conflicts after replication.
> --------------------------------------------------
>
>                 Key: COUCHDB-885
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-885
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>    Affects Versions: 1.0.1
>         Environment: Mac OSX, Windows XP, Windows 7
>            Reporter: Nikolai Teofilov
>             Fix For: 1.2
>
>
> Step to reproduce the bug:
> 1.  Make database "test" on a remote couchdb server that reside on a different machine!

> 2.  Create new document:  "http://remote-server:5984/test/doc"
> 3.  Create database "replica"  on the local couchdb  server.
> 4.  Trigger pull replication  http://remote-server:5984/test -> http://localhost:5984/replica
> 5.  Attach a file to the replicated document on the local couchdb server.
> 6.  Trigger push replication http://localhost:5984/replica  -> http://remote-server:5984/test
> The document in the test  database shows one conflict. If instead attachment the document
is updated with a new field after the replication no conflict.
> The same sequence shows no conflicts on CouchDB 0.11.
> ************ test.sh ****************
> #!/usr/bin/env bash
> LOCAL="http://localhost:5984"
> REMOTE="http://koleto.couchone.com"
> echo "====================================================="
> echo "This sequence create a conflict after the replication"
> echo "====================================================="
> echo "Cleanup"
> curl --silent -X DELETE $LOCAL/replica
> curl --silent -X DELETE $REMOTE/test
> echo "Create database:" $REMOTE/test
> curl --silent -X PUT $REMOTE/test
> echo "Create empty document:"
> curl --silent -d '{}' -X PUT $REMOTE/test/doc
> echo "Create local databse:" $LOCAL/replica
> curl --silent -X PUT $LOCAL/replica
> echo "Pull replication:" REMOTE/test "->" $LOCAL/replica
> curl --silent -X POST -d "{\"source\":\"$REMOTE/test\",\"target\":\"$LOCAL/replica\"}"
-H 'Content-Type: application/json' $LOCAL/_replicate
> echo "Put an attachment to the document:"
> echo "foobar!" | curl --silent --upload-file - -X PUT "$LOCAL/replica/doc/foo.txt?rev=1-967a00dff5e02add41819138abb3284d"
> echo "Push replication:" $LOCAL/replica "->" $REMOTE/test
> curl --silent -X POST -d "{\"source\":\"$LOCAL/replica\",\"target\":\"$REMOTE/test\"}"
-H 'Content-Type: application/json' $LOCAL/_replicate
> echo '############## Get one conflic #####################'
> curl --silent -X GET $REMOTE/test/doc?conflicts=true
> echo "====================================================="
> echo "The same sequence with adding a field to the document"
> echo "====================================================="
> echo "Cleanup"
> curl --silent -X DELETE $LOCAL/replica
> curl --silent -X DELETE $REMOTE/test
> echo "Create database:" $REMOTE/test
> curl --silent -X PUT $REMOTE/test
> echo "Create empty document:"
> curl --silent -d '{}' -X PUT $REMOTE/test/doc
> echo "Create local databse:" $LOCAL/replica
> curl --silent -X PUT $LOCAL/replica
> echo "Pull replication:" REMOTE/test "->" $LOCAL/replica
> curl --silent -X POST -d "{\"source\":\"$REMOTE/test\",\"target\":\"$LOCAL/replica\"}"
-H 'Content-Type: application/json' $LOCAL/_replicate
> echo "Adding a new field:"
> curl --silent -d '{"foo":"bar" , "_rev" : "1-967a00dff5e02add41819138abb3284d" }' -X
PUT $LOCAL/replica/doc?rev=1-967a00dff5e02add41819138abb3284d
> echo "Push replication:" $LOCAL/replica "->" $REMOTE/test
> curl --silent -X POST -d "{\"source\":\"$LOCAL/replica\",\"target\":\"$REMOTE/test\"}"
-H 'Content-Type: application/json' $LOCAL/_replicate
> echo '###### No conflicts after the replication ########'
> curl --silent -X GET $REMOTE/test/doc?conflicts=true
>  

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