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https://issues.apache.org/jira/browse/HDFS-17198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17766290#comment-17766290
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ASF GitHub Bot commented on HDFS-17198:
---------------------------------------
hadoop-yetus commented on PR #6096:
URL: https://github.com/apache/hadoop/pull/6096#issuecomment-1723023243
:confetti_ball: **+1 overall**
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|||| _ Patch Compile Tests _ |
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| +1 :green_heart: | javadoc | 0m 31s | | the patch passed with JDK
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| +1 :green_heart: | javadoc | 0m 24s | | the patch passed with JDK
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|||| _ Other Tests _ |
| +1 :green_heart: | unit | 24m 12s | | hadoop-hdfs-rbf in the patch
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| | | 162m 56s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.43 ServerAPI=1.43 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6096/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/6096 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
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| uname | Linux f64a7086e8a5 4.15.0-212-generic #223-Ubuntu SMP Tue May 23
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| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6096/2/testReport/ |
| Max. process+thread count | 3087 (vs. ulimit of 5500) |
| modules | C: hadoop-hdfs-project/hadoop-hdfs-rbf U:
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| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6096/2/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
This message was automatically generated.
> RBF: fix bug of getRepresentativeQuorum when records have same dateModified
> ---------------------------------------------------------------------------
>
> Key: HDFS-17198
> URL: https://issues.apache.org/jira/browse/HDFS-17198
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
> Labels: pull-request-available
> Attachments: HDFS-17198.v001.patch
>
>
> h2. *Bug description*
> In the original implementation, when each router reports nn status at
> different times, the nn status is the status reported by majority routers,
> for example:
> router1 -> nn0:active dateModified:1
> router2 -> nn0:active dateModified:2
> router3 -> nn0:active dateModified:3
> router0 -> nn0:standby dateModified:4
> Then, the status of nn0 is active, because majority routers report that nn0
> is active.
> If majority routers report nn status at the same time, for example:
> (record1) router1 -> nn0:active dateModified:1
> (record2) router2 -> nn0:active dateModified:1
> (record3) router3 -> nn0:active dateModified:1
> (record4) router0 -> nn0:standbydateModified:2
> Then the state of nn0 is standby, but We expect the status of nn0 is active
> This bug is because the above record is put into the Treeset in the method
> getRepresentativeQuorum. Since record1,2,3 have the same dateModified, there
> will only be one record in the final treeset of this method, so this method
> thinks that this nn is standby, because record4 newer
> h2. *How to reproduce*
> Running my unit test testRegistrationMajorityQuorumEqDateModified, but using
> the original code
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