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Posted to commits@cassandra.apache.org by "Robert Stupp (JIRA)" <ji...@apache.org> on 2015/08/02 16:54:04 UTC

[jira] [Created] (CASSANDRA-9954) Improve Java-UDF timeout detection

Robert Stupp created CASSANDRA-9954:
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             Summary: 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.



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