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https://issues.apache.org/jira/browse/COUCHDB-3113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890507#comment-15890507
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ASF subversion and git services commented on COUCHDB-3113:
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Commit dd02a3938f267716e3479b7162e0b0a4f8ba3d51 in couchdb-fabric's branch
refs/heads/2971-count-distinct from [~tonysun83]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-fabric.git;h=dd02a39 ]
Return error when workers crash
Currently, when one worker survives in fabric_open_revs, we return that
as the response. However, when all workers crash, we still return
{ok, []}. This changes the response to an error.
COUCHDB-3113
> fabric:open_revs can return {ok, []}
> ------------------------------------
>
> Key: COUCHDB-3113
> URL: https://issues.apache.org/jira/browse/COUCHDB-3113
> Project: CouchDB
> Issue Type: Bug
> Reporter: ILYA
>
> According to typespec fabric:open_revs should return
> - {ok, #doc{}}
> - {{not_found,missing}, revision()}
> However in the case when the coordinator receive rexi_EXIT from multiple
> workers before the reply (for example when the worker crashes) the open_revs
> reply becomes \{ok, []}.
> This is due to the fact that we dispatch rexi_DOWN and rexi_EXIT recursively
> to handle_message(\{ok, Replies} [see
> here|https://github.com/apache/couchdb-fabric/blob/master/src/fabric_doc_open_revs.erl#L73
> clause]. Note that we set reply to be [] and worker to be nil.
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