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https://issues.apache.org/jira/browse/CASSANDRA-9954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Stupp updated CASSANDRA-9954:
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Description:
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.
was:
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.
> 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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