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https://issues.apache.org/jira/browse/HDFS-16402?focusedWorklogId=701731&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-701731
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ASF GitHub Bot logged work on HDFS-16402:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Dec/21 00:23
Start Date: 29/Dec/21 00:23
Worklog Time Spent: 10m
Work Description: tomscut opened a new pull request #3839:
URL: https://github.com/apache/hadoop/pull/3839
JIRA: [HDFS-16402](https://issues.apache.org/jira/browse/HDFS-16402).
After reconfig `dfs.datanode.data.dir`, we found that the stats of the
Namenode Web became negative and there were many NPE in namenode logs. This
problem has been solved by
[HDFS-14042](https://issues.apache.org/jira/browse/HDFS-14042).
However, if `HeartbeatManager#updateHeartbeat` and
`HeartbeatManager#updateLifeline` throw other exceptions, stats errors can also
occur. We should ensure that `stats.subtract()` and `stats.add()` are
transactional.
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Issue Time Tracking
-------------------
Worklog Id: (was: 701731)
Remaining Estimate: 0h
Time Spent: 10m
> HeartbeatManager may cause incorrect stats
> ------------------------------------------
>
> Key: HDFS-16402
> URL: https://issues.apache.org/jira/browse/HDFS-16402
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: tomscut
> Assignee: tomscut
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> After reconfig {*}dfs.datanode.data.dir{*}, we found that the stats of the
> Namenode Web became negative and there were many NPE in namenode logs. This
> problem has been solved by
> [HDFS-14042|https://issues.apache.org/jira/browse/HDFS-14042].
> However, if HeartbeatManager#updateHeartbeat and
> HeartbeatManager#updateLifeline throw other exceptions, stats errors can also
> occur. We should ensure that stats.subtract() and stats.add() are
> transactional.
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