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Posted to issues@hbase.apache.org by "Bryan Beaudreault (Jira)" <ji...@apache.org> on 2023/02/16 14:33:00 UTC

[jira] [Created] (HBASE-27648) CopyOnWriteArrayMap does not honor contract of ConcurrentMap.putIfAbsent

Bryan Beaudreault created HBASE-27648:
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             Summary: CopyOnWriteArrayMap does not honor contract of ConcurrentMap.putIfAbsent
                 Key: HBASE-27648
                 URL: https://issues.apache.org/jira/browse/HBASE-27648
             Project: HBase
          Issue Type: Bug
            Reporter: Bryan Beaudreault


I've been tracking down a meta cache issue and noticed this. I'm not sure if this is actually causing an issue, but if you enable TRACE logs on MetaCache it causes all calls to cacheLocation to go down the "Merged cached locations" path instead of the "Cached location" path for inserting new entries. This is just misleading, but also means going through the more expensive RegionLocations.mergeLocations. Reading the code, I don't think that would cause an actual issue, but hard to be sure.



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