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https://issues.apache.org/jira/browse/CASSANDRA-8245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14212700#comment-14212700
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Brandon Williams commented on CASSANDRA-8245:
---------------------------------------------
All of these dumps show the nodes blocked on flushing the system table as a
result of processing a new node joining, which means that a lot of nodes must
be joining. The interesting message here is:
{noformat}
DEBUG [GossipStage:1] 2014-08-12 11:33:18,801 FailureDetector.java (line 338)
Ignoring interval time of 2085963047
{noformat}
Which means it didn't see a heartbeat from that node for *241 days*, which
almost certainly points to a system clock problem of some sort. I strongly
suspect this is environmental, not a bug in Cassandra.
> 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
> Assignee: Brandon Williams
> Priority: Minor
> Attachments: stack1.txt, stack2.txt, stack3.txt, stack4.txt,
> stack5.txt
>
>
> 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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