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https://issues.apache.org/jira/browse/SOLR-4203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13533511#comment-13533511
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Yonik Seeley edited comment on SOLR-4203 at 12/16/12 9:12 PM:
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Seems like another issue is that it could introduce a race...
starting the update log could start recovery, which may or may not finish 
before the update log is closed.

edit: actually init() doesn't kick off recovery.
But the fact remains, UpdateLog was not meant to be closed and re-inited (there 
is other state that probably doesn't get cleared, etc).
                
      was (Author: [email protected]):
    Seems like another issue is that it could introduce a race...
starting the update log could start recovery, which may or may not finish 
before the update log is closed.
                  
> An ephemeral directory implementation should cause the transaction log to be 
> ignored on startup.
> ------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-4203
>                 URL: https://issues.apache.org/jira/browse/SOLR-4203
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>             Fix For: 4.1, 5.0
>
>         Attachments: SOLR-4203.patch
>
>
> If you are using something like ram dir, you can restart a node and if no 
> updates have come in, it will think its up to date but be empty - we should 
> clear the update log in these cases on startup.

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