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https://issues.apache.org/jira/browse/TINKERPOP-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryn Cooke reopened TINKERPOP-887:
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Please could you take a look at the PR and see if it has any potential?
It adds a new strategy that appends a final step to top level traversals that
converts any FastNoSuchElementException in to a regular NoSuchElementException.
It means that we don't get the stack trace in to the traversal, but clients do
get information about where in their code the exception was thrown.
> FastNoSuchElementException hides stack trace in client code
> -----------------------------------------------------------
>
> Key: TINKERPOP-887
> URL: https://issues.apache.org/jira/browse/TINKERPOP-887
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.0.2-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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