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