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https://issues.apache.org/jira/browse/KAFKA-1023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751705#comment-13751705
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Micah Whitacre commented on KAFKA-1023:
---------------------------------------

Thanks for the feedback.  The fact that LogManager was sealed helped to 
indicate this was not a common integration point.  The concern of losing a 
message due to a consumer being slow or down for a period and the log manager 
removing messages due to space was what initially inspired looking at it 
through this approach.  

Is there by chance a way of alarming/tracking if a log roll is about to occur 
and not all consumers have an offset higher than the values to be deleted?
                
> Allow Injectable LogManager
> ---------------------------
>
>                 Key: KAFKA-1023
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1023
>             Project: Kafka
>          Issue Type: Improvement
>          Components: core
>            Reporter: Micah Whitacre
>
> Currently the LogManager is responsible for deleting and cleaning up messages 
> based on time or size.  It'd be nice to be able enhance the LogManager to not 
> only perform the cleanup but maybe also backup the messages eligible for 
> deletion to a custom location (hdfs).  This would allow a backup plan in the 
> case of a consumer not able to keep up with the messages and data being lost 
> due to log rolling.
> Currently LogManager is sealed so no one can extend it but additionally we'd 
> need a way to inject the custom LogManager into the KafkaServer. 

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