GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/15989
[SPARK-18557] Downgrade confusing memory leak warning message
## What changes were proposed in this pull request?
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:
```
WARN [Executor task launch worker-0]
org.apache.spark.memory.TaskMemoryManager - leak 16.3 MB memory from
org.apache.spark.unsafe.map.BytesToBytesMap@33fb6a15
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, this patch downgrade the message from warning to
debug level, and avoids using the word "leak" since it is not actually a leak.
## How was this patch tested?
N/A - this is a simple logging improvement.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-18557
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15989.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15989
----
commit 46b5af977f5976101e1b325de0ff3ac081e65235
Author: Reynold Xin <r...@databricks.com>
Date: 2016-11-23T07:59:23Z
[SPARK-18557] Downgrade confusing memory leak warning message
----
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