[jira] [Updated] (CASSANDRA-2797) Repair hangs if a neighbor has nothing to send

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sylvain Lebresne updated CASSANDRA-2797:
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    Attachment: 0001-Always-initiate-streaming-transfer-to-notify-remote-.patch

Apparently the code was already wired to handle initiating a session with nothing to transfer, but a if prevented that code path. Patch attached against 0.7.

> Repair hangs if a neighbor has nothing to send 
> -----------------------------------------------
>
>                 Key: CASSANDRA-2797
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2797
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7.6
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>              Labels: repair, streaming
>             Fix For: 0.7.7, 0.8.2
>
>         Attachments: 0001-Always-initiate-streaming-transfer-to-notify-remote-.patch
>
>
> This is actually a streaming problem. If a StreamOutSession has nothing to transfer (i.e, no sstables have the requested ranges), it will not even initiate the transfer and simply close the session right away. The problem is that if the session was initiated by a remote end (through a StreamRequestMessage), the remote end will never be notified and never run his callback.

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