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Posted to dev@lucene.apache.org by "Cao Manh Dat (JIRA)" <ji...@apache.org> on 2017/10/17 02:40:00 UTC
[jira] [Updated] (SOLR-11478) Solr should remove it's entry from
live_nodes in zk immediately on shutdown and add after solr has loaded it's
cores and is ready to serve requests.
[ https://issues.apache.org/jira/browse/SOLR-11478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Cao Manh Dat updated SOLR-11478:
--------------------------------
Attachment: SOLR-11478.patch
Patch for this ticket, all tests passed. Will commit soon.
> Solr should remove it's entry from live_nodes in zk immediately on shutdown and add after solr has loaded it's cores and is ready to serve requests.
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-11478
> URL: https://issues.apache.org/jira/browse/SOLR-11478
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Reporter: Binoy Dalal
> Priority: Minor
> Attachments: SOLR-11478.patch
>
>
> Solr currently, upon receiving the stop command, removes its entry from the zk /live_nodes znode after it has finished processing all inflight requests, just before finally shutting down.
> In this case, any applications that depend on a solr node's live_node entry to decide whether or not to query it fail once the stop command has been executed but solr has not yet fully shut down.
> Something similar occurs during startup of a solr node. The solr node seems to add it's entry to the /live_nodes in zk once it is up but before it has started accepting requests and once again, this causes dependent applications to fail in a similar fashion.
> Hence, removal of the node entry and addition of the same to the zk live_nodes immediately upon shutting down and at the very end upon coming up respectively will greatly benefit applications that depend the live_nodes znode.
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