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From "Michael Shuler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8245) Cassandra nodes periodically die in 2-DC configuration
Date Mon, 03 Nov 2014 16:47:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14194715#comment-14194715
] 

Michael Shuler commented on CASSANDRA-8245:
-------------------------------------------

Additionally, those dates go from 2014-08-12 to 2014-10-06 - are the datacenters communicating
properly at all?

> Cassandra nodes periodically die in 2-DC configuration
> ------------------------------------------------------
>
>                 Key: CASSANDRA-8245
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8245
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Scientific Linux release 6.5
> java version "1.7.0_51"
> Cassandra 2.0.9
>            Reporter: Oleg Poleshuk
>            Priority: Minor
>
> We have 2 DCs with 3 nodes in each.
> Second DC periodically has 1-2 nodes down.
> Looks like it looses connectivity with another nodes and then Gossiper starts to accumulate
tasks until Cassandra dies with OOM.
> WARN [MemoryMeter:1] 2014-08-12 14:34:59,803 Memtable.java (line 470) setting live ratio
to maximum of 64.0 instead of Infinity
>  WARN [GossipTasks:1] 2014-08-12 14:44:34,866 Gossiper.java (line 637) Gossip stage has
1 pending tasks; skipping status check (no nodes will be marked down)
>  WARN [GossipTasks:1] 2014-08-12 14:44:35,968 Gossiper.java (line 637) Gossip stage has
4 pending tasks; skipping status check (no nodes will be marked down)
>  WARN [GossipTasks:1] 2014-08-12 14:44:37,070 Gossiper.java (line 637) Gossip stage has
8 pending tasks; skipping status check (no nodes will be marked down)
>  WARN [GossipTasks:1] 2014-08-12 14:44:38,171 Gossiper.java (line 637) Gossip stage has
11 pending tasks; skipping status check (no nodes will be marked down)
> ...
> WARN [GossipTasks:1] 2014-10-06 21:42:51,575 Gossiper.java (line 637) Gossip stage has
1014764 pending tasks; skipping status check (no nodes will be marked down)
>  WARN [New I/O worker #13] 2014-10-06 21:54:27,010 Slf4JLogger.java (line 76) Unexpected
exception in the selector loop.
> java.lang.OutOfMemoryError: Java heap space
> Also those lines but not sure it is relevant:
> DEBUG [GossipStage:1] 2014-08-12 11:33:18,801 FailureDetector.java (line 338) Ignoring
interval time of 2085963047



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