HeartSaVioR commented on issue #25853: [SPARK-21869][SS] Apply Apache Commons Pool to Kafka producer URL: https://github.com/apache/spark/pull/25853#issuecomment-563018231 I think the major problem is actually the timeout policy (sure it is not the only problem) - it's pointless to use "last access time + interval" as "time to live" as producer will be borrowed by tasks and being used until tasks return to the cache/pool. It should be "last returned time + interval", maybe "last returned time where reference count goes 0 + interval" considering reference count. That means, we may have to reimplement the cache logic regardless of reverting this one.
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