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https://issues.apache.org/jira/browse/DRILL-5511?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva closed DRILL-5511.
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> Additional UserException categories for internal errors
> -------------------------------------------------------
>
> Key: DRILL-5511
> URL: https://issues.apache.org/jira/browse/DRILL-5511
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.11.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
>
> The {{UserException}} class in Drill is the way that Drill passes error
> conditions from the server to the client. {{UserException}} groups errors
> into a number of categories as defined in [the protobuf
> definitions|https://github.com/apache/drill/blob/master/protocol/src/main/protobuf/UserBitShared.proto].
> As we enhance error handling in operators, it becomes clear that some errors
> do not fit into the existing categories. In particular:
> * Execution errors: problems related to run-time issues where the cause is
> not known, or the error does not fit into an existing category. This might
> occur, say, if a temporary file fills, a spill file is deleted or other
> odd-ball cases.
> * Internal error: error that indicates failure of Drill code, invariants or
> the like. Internal errors are generally not something wrong with the user's
> data, query or environment, but rather something wrong with Drill itself. For
> example, all {{IllegalStateException}}, {{AssertionError}} or
> {{IllegalArgumentException}} errors would map to an internal error.
> * Unspecified error: for cases where Drill code caches an exception from a
> deeper layer, but we don't know enough about the exception to render a useful
> categorization. Most often used in cases of plugins that don't do adequate
> error handing themselves.
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