Joel Bernstein created SOLR-3939:
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Summary: Solr Cloud recovery and leader election when unloading
leader core
Key: SOLR-3939
URL: https://issues.apache.org/jira/browse/SOLR-3939
Project: Solr
Issue Type: Bug
Components: SolrCloud
Affects Versions: 4.0-BETA
Reporter: Joel Bernstein
Fix For: 4.1
When a leader core is unloaded using the core admin api, the followers in the
shard go into recovery but do not come out. Leader election doesn't take place
and the shard goes down.
This effects the ability to move a micro-shard from one Solr instance to
another Solr instance.
The problem does not occur 100% of the time but a large % of the time.
To setup a test, startup Solr Cloud with a single shard. Add cores to that
shard as replicas using core admin. Then unload the leader core using core
admin.
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