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https://issues.apache.org/jira/browse/SOLR-8862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15200233#comment-15200233
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Noble Paul edited comment on SOLR-8862 at 3/17/16 7:46 PM:
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bq.ZkController.checkOverseerDesignate() is called (no idea what that does)
I probably should add a comment there. If an overseer designate is down and
comes back up, it should be pushed ahead of non designates . So it sends a
message to overseer to put it in the front of the overseer election queue
was (Author: noble.paul):
bq.ZkController.checkOverseerDesignate() is called (no idea what that does)
I probaly should add a comment there. If an overseer designate is down and
comes back up, it should be pushed ahead of non designates . So it sends a
message to overseer to put it in the front of the overseer election queue
> /live_nodes is populated too early to be very useful for clients --
> CloudSolrClient (and MiniSolrCloudCluster.createCollection) need some other
> ephemeral zk node to knowwhich servers are "ready"
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-8862
> URL: https://issues.apache.org/jira/browse/SOLR-8862
> Project: Solr
> Issue Type: Bug
> Reporter: Hoss Man
>
> {{/live_nodes}} is populated surprisingly early (and multiple times) in the
> life cycle of a sole node startup, and as a result probably shouldn't be used
> by {{CloudSolrClient}} (or other "smart" clients) for deciding what servers
> are fair game for requests.
> we should either fix {{/live_nodes}} to be created later in the lifecycle, or
> add some new ZK node for this purpose.
> {panel:title=original bug report}
> I haven't been able to make sense of this yet, but what i'm seeing in a new
> SolrCloudTestCase subclass i'm writing is that the code below, which
> (reasonably) attempts to create a collection immediately after configuring
> the MiniSolrCloudCluster gets a "SolrServerException: No live SolrServers
> available to handle this request" -- in spite of the fact, that (as far as i
> can tell at first glance) MiniSolrCloudCluster's constructor is suppose to
> block until all the servers are live..
> {code}
> configureCluster(numServers)
> .addConfig(configName, configDir.toPath())
> .configure();
> Map<String, String> collectionProperties = ...;
> assertNotNull(cluster.createCollection(COLLECTION_NAME, numShards,
> repFactor,
> configName, null, null,
> collectionProperties));
> {code}
> {panel}
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