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https://issues.apache.org/jira/browse/COUCHDB-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921726#action_12921726
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Filipe Manana commented on COUCHDB-704:
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I had once or 2 that same issue with conflict when saving the checkpoint in the
source DB (for a pull replication). But I don't remember if there was a retry
or not, neither could reproduce the issue.
Let's wait for Adam's point of view.
> Replication can lose checkpoints
> --------------------------------
>
> Key: COUCHDB-704
> URL: https://issues.apache.org/jira/browse/COUCHDB-704
> Project: CouchDB
> Issue Type: Bug
> Components: Replication
> Affects Versions: 0.11.2, 1.0.1
> Reporter: Randall Leeds
> Priority: Minor
> Attachments: keep_session_id.patch, save-all-rep-checkpoints.patch,
> whitespace.patch
>
> Original Estimate: 0h
> Remaining Estimate: 0h
>
> When saving replication checkpoints in the _local/<repid> document the new
> entry is always pushed onto the _original_ "history" list property that
> existed at the start of the replication. When any number of things causes the
> checkpoint to be written to only one of the databases the head of the history
> list gets out of sync. Subsequent attempts to start this replication must
> start from the latest common replication log entry in the _original_ history,
> as though this replication never occurred.
> A better idea is to push every checkpoint onto the history instead of
> replacing the head on each save.
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