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https://issues.apache.org/jira/browse/SOLR-6554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shalin Shekhar Mangar updated SOLR-6554:
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Attachment: SOLR-6554.patch
Here's a better patch which takes care of some of the nocommits:
# The live nodes information is read from the ZkStateReader's cluster state
because the one in ZkStateWriter's cluster state might be stale
# We force refresh the clusterstate once at the beginning of the loop and then
only if there's an error in the main loop.
# Added a simple TestClusterStateMutator, I'll add more.
I still have a few ideas I'd like to try.
> Speed up overseer operations for collections with stateFormat > 1
> -----------------------------------------------------------------
>
> Key: SOLR-6554
> URL: https://issues.apache.org/jira/browse/SOLR-6554
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 5.0, Trunk
> Reporter: Shalin Shekhar Mangar
> Attachments: SOLR-6554.patch, SOLR-6554.patch
>
>
> Right now (after SOLR-5473 was committed), a node watches a collection only
> if stateFormat=1 or if that node hosts at least one core belonging to that
> collection.
> This means that a node which is the overseer operates on all collections but
> watches only a few. So any read goes directly to zookeeper which slows down
> overseer operations.
> Let's have the overseer node watch all collections always and never remove
> those watches (except when the collection itself is deleted).
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