Github user jaltekruse commented on the pull request:
https://github.com/apache/drill/pull/483#issuecomment-211443568
We have talked about the possibility of providing a message to users when
they try using a malformed UDF, by providing a placeholder that will give them
back the message that was captured during failed registration. Would it be
useful to do that instead of logging an error? This is a reasonable behavior
for now, but it might be worth opening a follow up JIRA to get this information
back to users as soon as possible. I think it would generally adopt the idea
that sending people to the logs is something that should be avoided.
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