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https://issues.apache.org/jira/browse/KAFKA-2573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905020#comment-14905020
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Ashish K Singh commented on KAFKA-2573:
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[~ijuma] thanks for pointing it out. I was under impression that Kafka code is
compiled on the vagrant hosts and never thought it could be the java version
causing the issue. Yes, it was due to using java8 at compile time and java 7 at
run time. I am not sure, but I think that is not something we should be worried
about. Let me know your thoughts, and we can close the JIRA accordingly.
> Mirror maker system test hangs and eventually fails
> ---------------------------------------------------
>
> Key: KAFKA-2573
> URL: https://issues.apache.org/jira/browse/KAFKA-2573
> Project: Kafka
> Issue Type: Bug
> Reporter: Ashish K Singh
> Assignee: Ashish K Singh
>
> Due to changes made in KAFKA-2015, handling of {{--consumer.config}} has
> changed, more details is specified on KAFKA-2467. This leads to the exception.
> {code}
> Exception in thread "main" java.lang.NoSuchMethodError:
> java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
> at kafka.utils.Pool.keys(Pool.scala:77)
> at
> kafka.consumer.FetchRequestAndResponseStatsRegistry$.removeConsumerFetchRequestAndResponseStats(FetchRequestAndResponseStats.scala:69)
> at
> kafka.metrics.KafkaMetricsGroup$.removeAllConsumerMetrics(KafkaMetricsGroup.scala:189)
> at
> kafka.consumer.ZookeeperConsumerConnector.shutdown(ZookeeperConsumerConnector.scala:200)
> at kafka.consumer.OldConsumer.stop(BaseConsumer.scala:75)
> at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:98)
> at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:57)
> at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:41)
> at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
> {code}
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