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From "Ariel Weisberg (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-9954) Improve Java-UDF timeout detection
Date Mon, 30 Nov 2015 23:31:11 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ariel Weisberg updated CASSANDRA-9954:
--------------------------------------
    Reviewer: Ariel Weisberg

> Improve Java-UDF timeout detection
> ----------------------------------
>
>                 Key: CASSANDRA-9954
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9954
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Robert Stupp
>            Assignee: Robert Stupp
>             Fix For: 3.x
>
>
> CASSANDRA-9402 introduced a sandbox using a thread-pool to enforce security constraints
and to detect "amok UDFs" - i.e. UDFs that essentially never return (e.g. {{while (true)}}.
> Currently the safest way to react on such an "amok UDF" is to _fail-fast_ - to stop the
C* daemon since stopping a thread (in Java) is just no solution.
> CASSANDRA-9890 introduced further protection by inspecting the byte-code. The same mechanism
can also be used to manipulate the Java-UDF byte-code.
> By manipulating the byte-code I mean to add regular "is-amok-UDF" checks in the compiled
code.
> EDIT: These "is-amok-UDF" checks would also work for _UNFENCED_ Java-UDFs.



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