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https://issues.apache.org/jira/browse/CASSANDRA-11116?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksey Yeschenko updated CASSANDRA-11116:
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Fix Version/s: 2.1.14
> Gossiper#isEnabled is not thread safe
> -------------------------------------
>
> Key: CASSANDRA-11116
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11116
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Sergio Bossa
> Assignee: Ariel Weisberg
> Priority: Critical
> Fix For: 2.1.14, 2.2.6, 3.0.4, 3.4
>
>
> {{Gossiper#isEnabled()}} relies on the presence of {{scheduledGossipTask}},
> which is not final nor volatile. As a consequence, when such method is called
> on a different thread, i.e. the gossip stage thread, it is sometimes detected
> as not enabled, causing particularly obscure failures.
> This is shown by the following logs. First the gossiper is started:
> {noformat}
> 1 TRACE [Thread-29] 2016-02-03 19:21:31,232 Gossiper.java (line 1310) gossip
> started with generation 1454527291
> {noformat}
> Then the same node misses a gossip message because the gossiper is seen as
> disabled:
> {noformat}
> 1 TRACE [GossipStage:1] 2016-02-03 19:21:32,016
> GossipDigestSynVerbHandler.java (line 44) Ignoring GossipDigestSynMessage
> because gossip is disabled
> {noformat}
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