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Donald Smith commented on CASSANDRA-8245: ----------------------------------------- We're getting a similar increase in the number of pending Gossip stage tasks, followed by OutOfMemory. This happens once a day or so on some node of our 38 node DC. Other nodes have increases in pending Gossip stage tasks but they recover. This is with C* 2.0.11. We have two other DCs. ntpd is running on all nodes. But all nodes on one DC are down now. > 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 -- This message was sent by Atlassian JIRA (v6.3.4#6332)