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https://issues.apache.org/jira/browse/KAFKA-6341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285781#comment-16285781
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Ismael Juma commented on KAFKA-6341:
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The intent is for the variable to be accessed from a single thread. Please
elaborate why you think multiple threads are updating it. cc [~rsivaram]
> 'networkThreadTimeNanos' in KafkaChannel is not thread safe
> -----------------------------------------------------------
>
> Key: KAFKA-6341
> URL: https://issues.apache.org/jira/browse/KAFKA-6341
> Project: Kafka
> Issue Type: Bug
> Components: metrics
> Affects Versions: 1.0.0
> Reporter: huxihx
>
> `networkThreadTimeNanos` in KafkaChannel is of primitive long type which is
> not thread safe. Multiple Processor threads could access(read and write) this
> variable at the same time. Since JVM spec does not guarantee of the atomic
> 64-bit operations against long/double types, it's safer to employ AtomicLong
> instead of the naive long type.
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