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https://issues.apache.org/jira/browse/HDFS-17476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17846212#comment-17846212
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ASF GitHub Bot commented on HDFS-17476:
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ZanderXu commented on PR #6747:
URL: https://github.com/apache/hadoop/pull/6747#issuecomment-2109505953
Thanks involving me.
@KeeProMise I'm just doubt what scenarios could cause a negative
`clientStateId`?
> fix: False positive "Observer Node is too far behind" due to long overflow.
> ---------------------------------------------------------------------------
>
> Key: HDFS-17476
> URL: https://issues.apache.org/jira/browse/HDFS-17476
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Critical
> Labels: pull-request-available
> Attachments: HDFS-17476.patch, image-2024-04-18-10-57-10-481.png
>
>
> In the code GlobalStateIdContext#receiveRequestState(), if clientStateId is a
> small negative number, clientStateId-serverStateId may be greater than
> （ESTIMATED_TRANSACTIONS_PER_SECOND due to overflow
> * TimeUnit.MILLISECONDS.toSeconds(clientWaitTime)
> * ESTIMATED_SERVER_TIME_MULTIPLIER）,
> resulting in false positives that Observer Node is too far behind.
> !image-2024-04-18-10-57-10-481.png|width=742,height=110!
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