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https://issues.apache.org/jira/browse/ZOOKEEPER-2990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16611993#comment-16611993
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Andor Molnar commented on ZOOKEEPER-2990:
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We can talk about it, but I would rather create stable release of 3.5 as soon
as possible and push users to upgrade.
> 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
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> It would be nice to have an ability to do probabilistic tracing similar to
> Cassandra
> [nodetool|https://docs.datastax.com/en/dse/5.1/dse-admin/datastax_enterprise/tools/nodetool/toolsSetTraceProbability.html]
> 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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