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https://issues.apache.org/jira/browse/CASSANDRA-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13404712#comment-13404712
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Herman Meerlo commented on CASSANDRA-4066:
------------------------------------------

Same here, certainly no kernel panics but nodes in the cluster just started 
marking each other as being dead:

 INFO [GossipTasks:1] 2012-07-01 02:00:55,110 Gossiper.java (line 818) 
InetAddress /192.168.20.139 is now dead.
 INFO [GossipStage:1] 2012-07-01 02:02:41,853 Gossiper.java (line 804) 
InetAddress /192.168.20.139 is now UP
                
> Cassandra cluster stops responding on time change (scheduling not using 
> monotonic time?) 
> -----------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-4066
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4066
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Linux; CentOS6 2.6.32-220.4.2.el6.x86_64
>            Reporter: David Daeschler
>            Assignee: Brandon Williams
>            Priority: Minor
>              Labels: gossip
>             Fix For: 1.1.1
>
>
> The server installation I set up did not have ntpd installed in the base 
> installation. When I noticed that the clocks were skewing I installed ntp and 
> set the date on all the servers in the cluster. A short time later, I started 
> getting UnavailableExceptions on the clients. 
> Also, one sever seemed to be unaffected by the time change. That server 
> happened to have it's time pushed forward, not backwards like the other 3 in 
> the cluster. This leads me to believe something is running on a 
> timer/schedule that is not monotonic.
> I'm posting this as a bug, but I suppose it might just be part of the 
> communication protocols etc for the cluster and part of the design. But I 
> think the devs should be aware of what I saw.
> Otherwise, thank you for a fantastic product. Even after restarting 75% of 
> the cluster things seem to have recovered nicely.

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