Andy Tolbert created CASSANDRA-12754:
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             Summary: Change cassandra.wait_for_tracing_events_timeout_secs 
default to -1 so C* doesn't wait on trace events to be written before 
responding to request by default
                 Key: CASSANDRA-12754
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12754
             Project: Cassandra
          Issue Type: Bug
            Reporter: Andy Tolbert


[CASSANDRA-11465] introduces a new system property 
{{cassandra.wait_for_tracing_events_timeout_secs}} that controls whether or not 
C* waits for events to be written before responding to client.   The current 
default behavior is to wait up to 1 second and then respond and timeout.  

If using probabilistic tracing this can cause queries to be randomly delayed up 
to 1 second.

Changing the default to -1 (disabled and enabling it explicitly in 
{{cql_tracing_test.TestCqlTracing.tracing_unknown_impl_test}}.

Ideally it would be nice to be able to control this behavior on a per request 
basis (which would require native protocol changes).



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