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https://issues.apache.org/jira/browse/ZOOKEEPER-816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890436#action_12890436
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Patrick Hunt commented on ZOOKEEPER-816:
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You should also consider using Avro for the marshalling/unmarshal of the 
records.
http://avro.apache.org/

Lots of benefits - in particular it's cross-language.

Re writing to disk - perhaps just re-use the ZK WAL code and write to a disk 
that's not storing the transactional log.


> Detecting and diagnosing elusive bugs and faults in Zookeeper
> -------------------------------------------------------------
>
>                 Key: ZOOKEEPER-816
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-816
>             Project: Zookeeper
>          Issue Type: New Feature
>            Reporter: Miguel Correia
>            Priority: Minor
>
> Complex distributed systems like Zookeeper tend to fail in strange ways that 
> are hard to diagnose. The objective is to build a tool that helps understand 
> when and where these problems occurred based on Zookeeper's traces (i.e., 
> logs in TRACE level). Minor changes to the server code will be needed.

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