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https://issues.apache.org/jira/browse/OAK-2718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483228#comment-14483228
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Tommaso Teofili commented on OAK-2718:
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in r1671853 I've made the {{NodeStateSolrServersObserver}} be wrapped by a
{{BackgroundObserver}} in {{NodeStateSolrServersObserverService}} to make the
observer work asynchronously.
> NodeStateSolrServersObserver performs complete diff synchronously causing
> slowness in dispatch
> ----------------------------------------------------------------------------------------------
>
> Key: OAK-2718
> URL: https://issues.apache.org/jira/browse/OAK-2718
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: oak-solr
> Reporter: Chetan Mehrotra
> Assignee: Tommaso Teofili
> Fix For: 1.2
>
>
> {{NodeStateSolrServersObserver}} is enabled by default and performs diff
> synchronously. Further it performs complete diff which might take time and
> would cause the dispatch thread to slowdown.
> This would cause issues at least with {{DocumentNodeStore}} as there the
> dispatch is done as part of background read and that call is time sensitive.
> As a fix the diff should performed asynchronously and also be selective. A
> similar fix was done for Lucene index as part of OAK-2570
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