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Posted to dev@lucene.apache.org by "Ramkumar Aiyengar (JIRA)" <ji...@apache.org> on 2014/07/22 00:28:41 UTC
[jira] [Comment Edited] (SOLR-6261) Run checkIfIamLeader in a
separate thread
[ https://issues.apache.org/jira/browse/SOLR-6261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14069428#comment-14069428 ]
Ramkumar Aiyengar edited comment on SOLR-6261 at 7/21/14 10:28 PM:
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Yeah, I thought of pooling this up as well initially, but then this is really a function of number of cores in the instance and a lot of threads used by Solr are really a function of the number of cores anyway?
Can still look into changing it..
was (Author: andyetitmoves):
Yeah, I thought of pooling this up as well initially, but then this is really a function of number of cores in the instance and a lot of threadpools are a function of the number of cores already?
Can still look into changing it..
> Run checkIfIamLeader in a separate 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
>
> 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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