Jakob Odersky created TOREE-365:
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Summary: Certain interpreter evaluations do not return result
strings
Key: TOREE-365
URL: https://issues.apache.org/jira/browse/TOREE-365
Project: TOREE
Issue Type: Bug
Reporter: Jakob Odersky
The scala interpreter currently only returns results for expressions. Import
statements and declarations will not show up as results in a notebook (although
they are evaluated internally).
This behaviour is related to the
[ScalaInterpreter#truncateResult|(https://github.com/apache/incubator-toree/blob/master/scala-interpreter/src/main/scala/org/apache/toree/kernel/interpreter/scala/ScalaInterpreter.scala#L165-L187]
function. This function runs the result string of a REPL line through a regex,
in order to remove the "resX:" part. The function returns the empty string in
case the line does not start with "resX:", therefore returning an empty string
for import statements and other declarations. This can have several subtle side
effects, such as TOREE-340, or a toree client never completing the "onResult"
callback.
A quick fix to this issue is to return the result string as-is if it does not
start with "resX".
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