smiklosovic commented on code in PR #4521:
URL: https://github.com/apache/cassandra/pull/4521#discussion_r2619556710
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src/java/org/apache/cassandra/db/compression/CompressionDictionaryCache.java:
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@@ -102,7 +102,12 @@ public void add(@Nullable CompressionDictionary
compressionDictionary)
// Only update cache if not already in the cache
DictId newDictId = compressionDictionary.dictId();
- cache.get(newDictId, id -> compressionDictionary);
+ CompressionDictionary cached = cache.get(newDictId, id ->
compressionDictionary);
+ if (cached != compressionDictionary)
+ {
+ compressionDictionary.close();
+ return;
+ }
Review Comment:
this is exercised when doing `refreshDictionaryFromSystemTable` repeatedly
(every `compression_dictionary_refresh_interval`) it is just that in tests,
this will be run also after `compression_dictionary_refresh_initial_delay`
which is 10s so if tests take longer than this then
`refreshDictionaryFromSystemTable` will kick in and it gets here
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