[jira] [Updated] (SOLR-8941) CoreAdminApi does not automatically recreate core.properties correctly

["Markus Jelsma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-8941?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Jelsma updated SOLR-8941:
--------------------------------
    Summary: CoreAdminApi does not automatically recreate core.properties correctly  (was: CoreAdminApi does not automatically recreate core.properties)

> CoreAdminApi does not automatically recreate core.properties correctly
> ----------------------------------------------------------------------
>
>                 Key: SOLR-8941
>                 URL: https://issues.apache.org/jira/browse/SOLR-8941
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 5.5.1
>            Reporter: Markus Jelsma
>             Fix For: master
>
>
> Using the core admin API i unload a core that is a replica in a small cloud. 
> {code}
> http://localhost:8983/solr/admin/cores?action=UNLOAD&core=logs_shard1_replica1
> {code}
> Then i recreate the core:
> {code}
> http://localhost:8983/solr/admin/cores?action=CREATE&collection=logs&shard=shard1&name=logs_shard1_replica1&core=logs_shard1_replica1
> {code}
> I would assume recreating it and adding it to an existing collection, would automatically also populate the numShards property in core.properties. But it doesn't, and causes NPE with CloudDescriptor.getNumShards() when running custom code.
> I can recreate the core correctly via property.name=value but this is not obvious in the documentation.
> This is core.properties before unloading:
> {code}
> #Written by CorePropertiesLocator
> #Fri Apr 01 13:07:11 UTC 2016
> numShards=2
> collection.configName=logs
> name=logs_shard1_replica1
> shard=shard1
> collection=logs
> coreNodeName=core_node4
> {code}
> This is after unloading and recreating:
> {code}
> #Written by CorePropertiesLocator
> #Mon Apr 04 15:42:59 UTC 2016
> name=logs_shard1_replica1
> shard=shard1
> collection=logs
> coreNodeName=core_node4
> {code}



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