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https://issues.apache.org/jira/browse/DRILL-4845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419792#comment-15419792
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Matt Keranen commented on DRILL-4845:
-------------------------------------
The exception in this case was thrown when the last line of a large CSV file
contained only "\."
Obviously bad data, but the exception gives no indication of where the problem
was, or that bad data was the cause.
> Malformed CSV throws IllegalArgumentException
> ---------------------------------------------
>
> Key: DRILL-4845
> URL: https://issues.apache.org/jira/browse/DRILL-4845
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Text & CSV
> Affects Versions: 1.6.0, 1.7.0
> Environment: CentOS 7
> Reporter: Matt Keranen
>
> When reading CSV data, if lines are malformed, often an error such as the
> following is reported:
> Error: SYSTEM ERROR: IllegalArgumentException: length: -15150 (expected:
> >= 0)
> Neither the error message reported to the client (with verbose errors on),
> nor on the drillbit describe what or where the problem is.
> Perhaps the CSV parser can throw exceptions that would help in locating what
> in the source data is not parsing?
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