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https://issues.apache.org/jira/browse/HDFS-16611?focusedWorklogId=778683&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-778683
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ASF GitHub Bot logged work on HDFS-16611:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 06/Jun/22 16:13
Start Date: 06/Jun/22 16:13
Worklog Time Spent: 10m
Work Description: slfan1989 closed pull request #4387: HDFS-16611. impove
TestSeveralNameNodes#testCircularLinkedListWrites Params
URL: https://github.com/apache/hadoop/pull/4387
Issue Time Tracking
-------------------
Worklog Id: (was: 778683)
Time Spent: 0.5h (was: 20m)
> impove TestSeveralNameNodes#testCircularLinkedListWrites Params
> ---------------------------------------------------------------
>
> Key: HDFS-16611
> URL: https://issues.apache.org/jira/browse/HDFS-16611
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.4.0
> Reporter: fanshilun
> Assignee: fanshilun
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When I was dealing with HDFS-16590 JIRA, Junit Tests often reported errors,
> I found that the following error messages often appear
> org.apache.hadoop.hdfs.server.namenode.ha.TestSeveralNameNodes#
> testCircularLinkedListWrites
> This method runs very close to success. It can be found that the current item
> is approximately equal to the target length in 3 runs. I think it can reduce
> the length of LIST_LENGTH and prolong the RUNTIME time, which can effectively
> increase the success rate of this Test.
> Reducing LIST_LENGTH does not change the running purpose of Test, and it can
> also test Circular Writes in the case of NN failover.
> * 1st run
> {code:java}
> 1st run
> [ERROR]
> testCircularLinkedListWrites(org.apache.hadoop.hdfs.server.namenode.ha.TestSeveralNameNodes)
> Time elapsed: 114.252 s <<< FAILURE!
> java.lang.AssertionError:
> Some writers didn't complete in expected runtime! Current writer
> state:[Circular Writer:
> directory: /test-0
> target length: 50
> current item: 43
> done: false
> , Circular Writer:
> directory: /test-1
> target length: 50
> current item: 47
> done: false
> , Circular Writer:
> directory: /test-2
> target length: 50
> current item: 42
> done: false
> ] expected:<0> but was:<3>
> {code}
> * 2st run
> {code:java}
> [ERROR]
> testCircularLinkedListWrites(org.apache.hadoop.hdfs.server.namenode.ha.TestSeveralNameNodes)
> Time elapsed: 110.349 s <<< FAILURE!
> java.lang.AssertionError:
> Some writers didn't complete in expected runtime! Current writer
> state:[Circular Writer:
> directory: /test-0
> target length: 50
> current item: 50
> done: false
> , Circular Writer:
> directory: /test-1
> target length: 50
> current item: 49
> done: false
> , Circular Writer:
> directory: /test-2
> target length: 50
> current item: 49
> done: false
> ] expected:<0> but was:<3>
> {code}
> * 3rd run
> {code:java}
> [ERROR]
> testCircularLinkedListWrites(org.apache.hadoop.hdfs.server.namenode.ha.TestSeveralNameNodes)
> Time elapsed: 109.364 s <<< FAILURE!
> java.lang.AssertionError:
> Some writers didn't complete in expected runtime! Current writer
> state:[Circular Writer:
> directory: /test-0
> target length: 50
> current item: 47
> done: false
> , Circular Writer:
> directory: /test-1
> target length: 50
> current item: 47
> done: false
> , Circular Writer:
> directory: /test-2
> target length: 50
> current item: 46
> done: false
> ] expected:<0> but was:<3>
> {code}
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