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https://issues.apache.org/jira/browse/SOLR-8862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15206745#comment-15206745
 ] 

ASF subversion and git services commented on SOLR-8862:
-------------------------------------------------------

Commit b6be74f2182c46a10f861556ea81d3ed1a79a308 in lucene-solr's branch 
refs/heads/jira/SOLR-445 from [~hossman_luc...@fucit.org]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=b6be74f ]

SOLR-8862 work around.  Maybe something like this should be promoted into 
MiniSolrCloudCluster's start() method? or SolrCloudTestCase's configureCluster?


> /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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