David Smiley created SOLR-13253:
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Summary: SolrResourceLoader of an IndexSchema should only be used
for building the schema stuff
Key: SOLR-13253
URL: https://issues.apache.org/jira/browse/SOLR-13253
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Schema and Analysis
Reporter: David Smiley
The IndexSchema has a SolrResourceLoader that's taken from a SolrConfig in its
constructor. If this IndexSchema gets re-used across Solr cores (via
"shareSchema" being true in solr.xml), and if this resourceLoader is used in
the future from a core that differs from the core the schema was created from,
bad things can happen (like a memory leak in
SolrResourceLoader.waitingForResources). The resourceLoader here is only
actually needed to help create the schema stuff, like analyzers. Once it's
done, it isn't needed anymore. However our Solr code base is using this in
other places that are not appropriate. It's a subtle problem as there's a
confluence of circumstances that need to occur to trigger it.
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