aaronsteers edited a comment on issue #5617: [SPARK-7037] [CORE] Inconsistent 
behavior for non-spark config properties in spark-shell and spark-submit
URL: https://github.com/apache/spark/pull/5617#issuecomment-565685945
 
 
   Is it expected that this error would print aws security keys to log files? 
Seems like a serious security concern.
   
   ```
   Warning: Ignoring non-spark config property: 
fs.s3a.access.key={full-access-key}
   Warning: Ignoring non-spark config property: 
fs.s3a.secret.key={full-secret-key}
   ```
   
   Could we not accomplish the same thing by printing the name of the key 
**without** the key's value?
   
   This might just be on my side, but my understanding is that I should be able 
to configure these via spark, and I was quite surprised to see them start 
showing up in my log files.

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