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From "Minh Do (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6619) Race condition issue during upgrading 1.1 to 1.2
Date Mon, 27 Jan 2014 22:19:43 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Minh Do updated CASSANDRA-6619:
-------------------------------

    Reviewer: Jason Brown

> Race condition issue during upgrading 1.1 to 1.2
> ------------------------------------------------
>
>                 Key: CASSANDRA-6619
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6619
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Minh Do
>            Assignee: Minh Do
>            Priority: Minor
>             Fix For: 1.2.14
>
>         Attachments: patch.txt
>
>
> There is a race condition during upgrading a C* 1.1x cluster to C* 1.2.
> One issue is that OutboundTCPConnection can't establish from a 1.2 node to some 1.1x
nodes.  Because of this, a live cluster during the upgrading will suffer in high read latency
and be unable to fulfill some write requests.  It won't be a problem if there is a small cluster
but it is a problem in a large cluster (100+ nodes) because the upgrading process takes 10+
hours to 1+ day(s) to complete.
> Acknowledging about CASSANDRA-5692, however, it is not fully fixed.  We already have
a patch for this and will attach shortly for feedback.



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