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https://issues.apache.org/jira/browse/SOLR-6261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14088476#comment-14088476
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Mark Miller edited comment on SOLR-6261 at 8/6/14 11:46 PM:
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Thanks Shalin, I'll take a look. Looks like the executor isn't working as
efficiently as we need.
was (Author: [email protected]):
Thanks Shalin, I'll take a look. Looks like the executor working as efficiently
as we need.
> Run ZK watch event callbacks in parallel to the event thread
> ------------------------------------------------------------
>
> Key: SOLR-6261
> URL: https://issues.apache.org/jira/browse/SOLR-6261
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 4.9
> Reporter: Ramkumar Aiyengar
> Assignee: Mark Miller
> Priority: Minor
> Fix For: 5.0, 4.10
>
>
> Currently checking for leadership (due to the leader's ephemeral node going
> away) happens in ZK's event thread. If there are many cores and all of them
> are due leadership, then they would have to serially go through the two-way
> sync and leadership takeover.
> For tens of cores, this could mean 30-40s without leadership before the last
> in the list even gets to start the leadership process. If the leadership
> process happens in a separate thread, then the cores could all take over in
> parallel.
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