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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2017/10/17 10:36:00 UTC

[jira] [Commented] (SOLR-11478) Solr should remove itself from live_nodes in zk immediately on shutdown

    [ https://issues.apache.org/jira/browse/SOLR-11478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16207267#comment-16207267 ] 

ASF subversion and git services commented on SOLR-11478:
--------------------------------------------------------

Commit 57e976341b24c5f86f090c52f41ce6940f9cd6a5 in lucene-solr's branch refs/heads/master from [~caomanhdat]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=57e9763 ]

SOLR-11478: Solr should remove itself from live_nodes in zk immediately on shutdown


> Solr should remove itself from live_nodes in zk immediately on shutdown
> -----------------------------------------------------------------------
>
>                 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
>            Assignee: Cao Manh Dat
>            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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