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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ZOOKEEPER-2990) Implement probabilistic tracing
Date Thu, 23 Aug 2018 21:12:00 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-2990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

ASF GitHub Bot updated ZOOKEEPER-2990:
    Labels: pull-request-available  (was: )

> Implement probabilistic tracing
> -------------------------------
>                 Key: ZOOKEEPER-2990
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2990
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>            Reporter: Bogdan Kanivets
>            Assignee: Bogdan Kanivets
>            Priority: Minor
>              Labels: pull-request-available
> It would be nice to have an ability to do probabilistic tracing similar to Cassandra 
> This will help debug issues in prod systems.
> I'd like to contribute if everyone is ok with the feature.
> My suggestion is to add an extra parameter to ZooTrace to handle it. Questions:
>  * should it be one global param or per each ZooTrace mask? I'm thinking per mask
>  * should it be a new 4lw or part of 'stmk'? Leaning towards new word and refactoring
param passing to words (stmk is a special case right now).
>  * there are places in the code that use LOG.trace directly. That will have to change
to ZooTrace
> I can make some initial implementation for demo/review.

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