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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-9954) Improve Java-UDF timeout detection
Date Sun, 02 Aug 2015 14:54:04 GMT
Robert Stupp created CASSANDRA-9954:
---------------------------------------

             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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