Patrick Hunt commented on ZOOKEEPER-920:

bq. svn diff attached. Thank you very much.

No, thank you! :-)  Regards.

> L7 (application layer) ping support
> -----------------------------------
>                 Key: ZOOKEEPER-920
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-920
>             Project: Zookeeper
>          Issue Type: New Feature
>          Components: c client
>    Affects Versions: 3.3.1
>            Reporter: Chang Song
>            Assignee: Chang Song
>            Priority: Minor
>             Fix For: 3.4.0
>         Attachments: ZOOKEEPER-920.patch
> Zookeeper is used in applications where fault tolerance is important. Its 
> client i/o thread send/recv heartbeats to/fro Zookeeper ensemble to stay 
> connected. However healthy heartbeat does not always means that the 
> application that uses Zookeeper client is in good health, it only means that 
> ZK client thread is in good health.
> This I needed something that can tagged onto Zookeeper ping that represents 
> L7 (application) health as well.
> I have modified C client source to support this in minimal way. I am new to 
> Zookeeper, so please code review this code.  I am actually using this code in 
> our in-house solution.
> https://github.com/tru64ufs/zookeeper/commit/2196d6d5114a2fd2c0a3bc9a55f4494d47d2aece
> Thank you very much.

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