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https://issues.apache.org/jira/browse/TINKERPOP3-887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14957011#comment-14957011
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Bryn Cooke commented on TINKERPOP3-887:
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Possibly, although it doesn't help for production deployments. Imagine a log
file full of FastNoSuchElementException messages but no clue as to where they
are being generated.
Would it be possible to convert FastNoSuchElementException to a regular
NoSuchElementException as it exits gremlin code? The user won't get a stack
trace right down in to the depths of the the traversal, but at least they'll
know which line in their code the error occurred on.
> FastNoSuchElementException hides stack trace in client code
> -----------------------------------------------------------
>
> Key: TINKERPOP3-887
> URL: https://issues.apache.org/jira/browse/TINKERPOP3-887
> Project: TinkerPop 3
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.0.1-incubating
> Reporter: Bryn Cooke
> Assignee: Marko A. Rodriguez
> Priority: Minor
>
> I wrote some code that incorrectly assumed that a Gremlin query would return
> an element, but it didn't. The surprise was that I got no stack trace and
> therefore had no idea where in *my* code I had introduced the error.
> I haven't looked in detail at the TP code, so what comes next is speculation:
> If FastNoSuchElementException is being used in truly exceptional
> circumstances then why is a singleton is used over a normal exception with
> stack trace? It could just as easily be converted to a normal exception.
> If FastNoSuchElementException is being used for control flow then probably it
> shouldn't. Code should check hasNext rather than trying for next and dealing
> with an exceptional result. I'm not sure what the current state of things are
> in the JVM but at least in the past try catch blocks would inhibit
> optimization even without stack traces so this type of code was considered an
> antipattern.
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