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From "Robert Stupp (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-9954) Improve Java-UDF timeout detection
Date Sun, 31 Jul 2016 14:41:20 GMT


Robert Stupp updated CASSANDRA-9954:
    Status: Patch Available  (was: Open)

Rebased the patch and triggered CI:

> Improve Java-UDF timeout detection
> ----------------------------------
>                 Key: CASSANDRA-9954
>                 URL:
>             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
> EDIT: These "is-amok-UDF" checks would also work for _UNFENCED_ Java-UDFs.

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