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  1. Solr
  2. SOLR-8941

CoreAdminApi does not automatically recreate core.properties correctly

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 5.5.1
    • 6.0
    • None
    • None

    Description

      Using the core admin API i unload a core that is a replica in a small cloud. 

      http://localhost:8983/solr/admin/cores?action=UNLOAD&core=logs_shard1_replica1

      Then i recreate the core:

      http://localhost:8983/solr/admin/cores?action=CREATE&collection=logs&shard=shard1&name=logs_shard1_replica1&core=logs_shard1_replica1

      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:

      #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

      This is after unloading and recreating:

      #Written by CorePropertiesLocator
#Mon Apr 04 15:42:59 UTC 2016
name=logs_shard1_replica1
shard=shard1
collection=logs
coreNodeName=core_node4

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            Unassigned Unassigned
            markus17 Markus Jelsma
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            Dates

              Created:
              Updated: