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https://issues.apache.org/jira/browse/BOOKKEEPER-154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196902#comment-13196902
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Sijie Guo commented on BOOKKEEPER-154:
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yes I agree. 
BTW, I have wrote a console client before in BOOKKEEPER-77 , which is used to 
do some metadata related operations, such as getTopicList, show metadata of a 
specified topic, read messages of a specified topic. Can we consider extracting 
meta operation code to put it into a HedwigAdmin client? 
                
> Garbage collect messages for those subscribers inactive/offline for a long 
> time. 
> ---------------------------------------------------------------------------------
>
>                 Key: BOOKKEEPER-154
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-154
>             Project: Bookkeeper
>          Issue Type: New Feature
>          Components: hedwig-client, hedwig-server
>    Affects Versions: 4.0.0
>            Reporter: Sijie Guo
>
> Currently hedwig tracks subscribers progress for garbage collecting published 
> messages. If subscriber subscribe and becomes offline without unsubscribing 
> for a long time, those messages published in its topic have no chance to be 
> garbage collected.
> A time based garbage collection policy would be suitable for this case. 

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