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https://issues.apache.org/jira/browse/SOLR-14425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17100839#comment-17100839
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Andrzej Bialecki commented on SOLR-14425:
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Ok, thanks for the explanation.
> Fix ZK sync usage to be synchronous (blocking)
> ----------------------------------------------
>
> Key: SOLR-14425
> URL: https://issues.apache.org/jira/browse/SOLR-14425
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Reporter: David Smiley
> Priority: Minor
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> As of this writing, we only use one call to ZK's "sync" method. It's related
> to collection aliases -- I added this. I discovered I misunderstood the
> semantics of the API; it syncs in the background and thus returns
> immediately. Looking at ZK's sync CLI command and Curator both made me
> realize my folly. I'm considering this only a "minor" issue because I'm not
> sure I've seen a bug from this; or maybe I did in spooky test failures over a
> year ago -- I'm not sure. And we don't use this pervasively (yet).
> It occurred to me that if Solr embraced the Curator framework abstraction
> over ZooKeeper, I would not have fallen into that trap. I'll file a separate
> issue for that.
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