[jira] Commented: (PIG-1427) Monitor and kill runaway UDFs

["Dmitriy V. Ryaboy (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-1427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876093#action_12876093 ] 

Dmitriy V. Ryaboy commented on PIG-1427:
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Ashutosh, Alan, et al: review please.

> Monitor and kill runaway UDFs
> -----------------------------
>
>                 Key: PIG-1427
>                 URL: https://issues.apache.org/jira/browse/PIG-1427
>             Project: Pig
>          Issue Type: New Feature
>    Affects Versions: 0.8.0
>            Reporter: Dmitriy V. Ryaboy
>            Assignee: Dmitriy V. Ryaboy
>         Attachments: guava-r03.jar, monitoredUdf.patch, monitoredUdf.patch, PIG-1427.diff
>
>
> As a safety measure, it is sometimes useful to monitor UDFs as they execute. It is often preferable to return null or some other default value instead of timing out a runaway evaluation and killing a job. We have in the past seen complex regular expressions lead to job failures due to just half a dozen (out of millions) particularly obnoxious strings.
> It would be great to give Pig users a lightweight way of enabling UDF monitoring.

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