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https://issues.apache.org/jira/browse/TOREE-395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15933109#comment-15933109
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Kevin Bates commented on TOREE-395:
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I agree that this could be considered a security issue - particularly if the
logged output is on a different server than the notebook (e.g., using JKG with
nb2kg).
This appears to be a function of how the output stream is initialized.
Currently it's setup using both {{Console.out}} and {{ByteArrayOutputStream}}.
However, if I remove {{Console.out}} from the initialization of
{{multiOutputStream}} in ScalaInterpreter.scala I still get the results in the
notebook but do not see the results in the output logs.
I would propose that we change the initialization of {{multiOutputStream}} to
only add {{Console.out}} if the logger reflects that debug is enabled or add a
specific option that prevents such logged output.
Comments?
> Provide a way to disable automatic printing of results in Toree Scala
> ---------------------------------------------------------------------
>
> Key: TOREE-395
> URL: https://issues.apache.org/jira/browse/TOREE-395
> Project: TOREE
> Issue Type: Improvement
> Affects Versions: 0.2.0
> Reporter: Kun Liu
>
> Scala REPL supports a flag, ":silent" to enable/disable automatic printing of
> results (those messages begin with "res"). This is also supported in Spark
> shell. But for Toree Scala kernel, this flag is not supported. Thus the
> result of a cell would be always printed.
> But if there is any logging mechanism, the results would be recorded in a log
> file, while this may not be desirable. For instance, a user may not want any
> sensitive data logged when running "dataRDD.take(5)" in a cell.
> Also found the possible source codes for this:
> https://github.com/apache/incubator-toree/blob/master/scala-interpreter/src/main/scala/org/apache/toree/kernel/interpreter/scala/ScalaInterpreter.scala
> There are three methods with silent: Boolean = false as parameter.
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