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https://issues.apache.org/jira/browse/HDFS-17476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17838301#comment-17838301
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ASF GitHub Bot commented on HDFS-17476:
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KeeProMise opened a new pull request, #6747:
URL: https://github.com/apache/hadoop/pull/6747
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### Description of PR
seeAlse : https://issues.apache.org/jira/browse/HDFS-17476
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.
### How was this patch tested?
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> 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
> Attachments: HDFS-17476.patch
>
>
> 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.
>
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