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https://issues.apache.org/jira/browse/COUCHDB-1080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Filipe Manana updated COUCHDB-1080:
-----------------------------------
Attachment: COUCHDB-1009-3.patch
Ok I just tested the patch, under error conditions, and the following caused a
nasty badarg stack trace
+ RepInfo = io_lib:format("replication `~s` (`~s` -> `~s`)",
+ [BaseId ++ Ext, Rep#rep_state.source_name, Rep#rep_state.target_name]),
Rep is not a #rep_state record but it's a #rep record.
I also changed the way to terminate the process. Instead of calling
exit(Reason) now it terminates by returning {stop, Reason, State}, which is
more OTPish.
The error sent in the JSON body to the client when one of the databases was
re-opened is like this:
{"error":"checkpoint_commit_failure","reason":"Source database out of sync. Try
to increase max_dbs_open at the source's server."}
cheers
> fail fast with checkpoint conflicts
> -----------------------------------
>
> Key: COUCHDB-1080
> URL: https://issues.apache.org/jira/browse/COUCHDB-1080
> Project: CouchDB
> Issue Type: Improvement
> Components: Replication
> Affects Versions: 1.0.2
> Reporter: Randall Leeds
> Fix For: 1.1, 1.2
>
> Attachments: COUCHDB-1009-3.patch, COUCHDB-1080-2-fdmanana.patch,
> COUCHDB-1080-fdmanana.patch, paranoid_checkpoint_failure.patch,
> paranoid_checkpoint_failure_v2.patch
>
>
> I've thought about this long and hard and probably should have submitted the
> bug a long time ago. I've also run this in production for months.
> When a checkpoint conflict occurs it is almost always the right thing to do
> to abort.
> If there is a rev mismatch it could mean there's are two conflicting
> (continuous and one-shot) replications between the same hosts running.
> Without reloading the history documents checkpoints will continue to fail
> forever. This could leave us in a state with many replicated changes but no
> checkpoints.
> Similarly, a successful checkpoint but a lost/timed-out response could cause
> this situation.
> Since the supervisor will restart the replication anyway, I think it's safer
> to abort and retry.
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