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From "Stefania (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12754) 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
Date Wed, 12 Oct 2016 02:34:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15567327#comment-15567327
] 

Stefania commented on CASSANDRA-12754:
--------------------------------------

The CI results are OK except for two failures in 3.X utests, but they don't seem related and
they pass locally. I've relaunched one more run of utests for 3.X.

> 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
>            Assignee: Stefania
>             Fix For: 2.2.x, 3.0.x, 3.x
>
>
> [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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