Erick Erickson created SOLR-4013:
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Summary: Creating a core should prevent more than one thread from
creating a core of the same name at once.
Key: SOLR-4013
URL: https://issues.apache.org/jira/browse/SOLR-4013
Project: Solr
Issue Type: Improvement
Affects Versions: 4.1, 5.0
Reporter: Erick Erickson
Assignee: Erick Erickson
Priority: Minor
Fix For: 4.1, 5.0
This hasn't been an issue so far since cores are created at startup. But in the
lots of cores case (see SOLR-1293) the probability that more than one thread
will attempt to create a core of the same name is vastly greater. We need to
block other threads from creating a core if the core is already being created
in a different thread.
Once the core is created, the blocked thread should pick up the newly-created
core rather than create it again.
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