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https://issues.apache.org/jira/browse/SPARK-18557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Herman van Hovell resolved SPARK-18557.
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Resolution: Fixed
Fix Version/s: 2.1.0
> Downgrade the memory leak warning message
> -----------------------------------------
>
> Key: SPARK-18557
> URL: https://issues.apache.org/jira/browse/SPARK-18557
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 2.1.0
>
>
> TaskMemoryManager has a memory leak detector that gets called at task
> completion callback and checks whether any memory has not been released. If
> they are not released by the time the callback is invoked, TaskMemoryManager
> releases them.
> The current error message says something like the following:
> {noformat}
> WARN [Executor task launch worker-0]
> org.apache.spark.memory.TaskMemoryManager - leak 16.3 MB memory from
> org.apache.spark.unsafe.map.BytesToBytesMap@33fb6a15
> {noformat}
> In practice, there are multiple reasons why these can be triggered in the
> normal code path (e.g. limit, or task failures), and the fact that these
> messages are log means the "leak" is fixed by TaskMemoryManager.
> To not confuse users, we should downgrade the message from warning to debug
> level, and avoid using the word "leak" since it is not actually a leak.
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