[
https://issues.apache.org/jira/browse/HDFS-16514?focusedWorklogId=745620&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-745620
]
ASF GitHub Bot logged work on HDFS-16514:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Mar/22 07:25
Start Date: 22/Mar/22 07:25
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #4088:
URL: https://github.com/apache/hadoop/pull/4088#issuecomment-1074823545
:broken_heart: **-1 overall**
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| +1 :green_heart: | shadedclient | 4m 20s | | branch has no errors
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| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4088/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/4088 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
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| uname | Linux 5e35c499cd9d 4.15.0-156-generic #163-Ubuntu SMP Thu Aug 19
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| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
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| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4088/2/testReport/ |
| Max. process+thread count | 32 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common
hadoop-hdfs-project/hadoop-hdfs-client U: . |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4088/2/console |
| versions | git=2.25.1 maven=3.6.3 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 745620)
Time Spent: 0.5h (was: 20m)
> Reduce the failover sleep time if multiple namenode are configured
> ------------------------------------------------------------------
>
> Key: HDFS-16514
> URL: https://issues.apache.org/jira/browse/HDFS-16514
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: qinyuren
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-03-21-18-11-37-191.png
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Recently, we used the [Standby Read] feature in our test cluster, and
> deployed 4 namenode as follow:
> node1 -> active nn
> node2 -> standby nn
> node3 -> observer nn
> node3 -> observer nn
> If we set ’dfs.client.failover.random.order=true‘, the client may failover
> twice and wait a long time to send msync to active namenode.
> !image-2022-03-21-18-11-37-191.png|width=698,height=169!
> I think we can reduce the sleep time of the first several failover based on
> the number of namenode
> For example, if 4 namenode are configured, the sleep time of first three
> failover operations is set to zero.
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