Andrzej Bialecki created SOLR-14239:
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Summary: Fix the behavior of CaffeineCache.computeIfAbsent
Key: SOLR-14239
URL: https://issues.apache.org/jira/browse/SOLR-14239
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 8.4.1
Reporter: Andrzej Bialecki
Assignee: Andrzej Bialecki
Fix For: 8.5
Spin-off from SOLR-13817, spotted by Andy Webb.
The back-port of {{CaffeineCache}} to branch_8x is missing a conditional
statement in {{computeIfAbsent}} which breaks the contract of this method, i.e.
if the loading function returns null the cache mapping should remain unchanged
and a null value should be returned.
This issue also modifies comments in the default {{solrconfig.xml}} to indicate
that the old cache implementations existing in branch_8x are deprecated in
favor of CaffeineCache.
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