LantaoJin opened a new pull request #27185: [SPARK-30494][SQL] Avoid duplicated cached RDD when create or replace an existing view URL: https://github.com/apache/spark/pull/27185 ### What changes were proposed in this pull request? The cached RDD for plan "select 1" stays in memory forever until the session close. This cached data cannot be used since the view temp1 has been replaced by another plan. It's a memory leak. We can reproduce by below commands: ``` beeline> create or replace temporary view temp1 as select 1 beeline> cache table tempView beeline> create or replace temporary view temp1 as select 1, 2 beeline> cache table tempView ``` assert(spark.sharedState.cacheManager.lookupCachedData(sql("select 1, 2")).isDefined) assert(spark.sharedState.cacheManager.lookupCachedData(sql("select 1")).isDefined) ### Why are the changes needed? Fix the memory leak, specially for long running mode. ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Add an unit test.
---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
