Markus Jelsma created SOLR-8941:
-----------------------------------
Summary: CoreAdminApi does not automatically recreate
core.properties
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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