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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-3216) A streamOutSession keeps sstables references forever if the remote end dies
Date Fri, 16 Sep 2011 13:38:10 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sylvain Lebresne updated CASSANDRA-3216:
----------------------------------------

    Attachment: 3216.patch

> A streamOutSession keeps sstables references forever if the remote end dies
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3216
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3216
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0.0
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>              Labels: streaming
>             Fix For: 1.0.0
>
>         Attachments: 3216.patch
>
>
> A streamOutSession acquire a reference on the sstable it will stream and release them
as soon as each sstable has been fully streamed. However, since a stream session has currently
no means to know when it failed, we'll keep references indefinitely (meaning until next restart)
if their is a failure. One way a stream session could very easily fail is if the remote end
dies. We must make sure we correctly release sstable references when that happens.
> Note that it won't be bulletproof, there is probably other means by which a streaming
could fail: a bug in the code throwing an exception, no space left on the receiving end, etc...
But those are unlikely enough that I propose to care only for the case of a node dying for
now and leave the bullet-proofing to CASSANDRA-3112. 

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