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https://issues.apache.org/jira/browse/HDFS-16557?focusedWorklogId=780187&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-780187
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ASF GitHub Bot logged work on HDFS-16557:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 10/Jun/22 03:18
            Start Date: 10/Jun/22 03:18
    Worklog Time Spent: 10m 
      Work Description: ZanderXu commented on PR #4219:
URL: https://github.com/apache/hadoop/pull/4219#issuecomment-1151885068

   Oh, i know, the root cause is that getJournaledEdits returns up to 5000 
txids by default. And 1049842441 - 1049837441 = 5000.
   
   I can't reached to 1050196644, so checkForGaps failed.




Issue Time Tracking
-------------------

    Worklog Id:     (was: 780187)
    Time Spent: 3h 40m  (was: 3.5h)

> BootstrapStandby failed because of checking gap for inprogress 
> EditLogInputStream
> ---------------------------------------------------------------------------------
>
>                 Key: HDFS-16557
>                 URL: https://issues.apache.org/jira/browse/HDFS-16557
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Tao Li
>            Assignee: Tao Li
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2022-04-22-17-17-14-577.png, 
> image-2022-04-22-17-17-14-618.png, image-2022-04-22-17-17-23-113.png, 
> image-2022-04-22-17-17-32-487.png
>
>          Time Spent: 3h 40m
>  Remaining Estimate: 0h
>
> The lastTxId of an inprogress EditLogInputStream lastTxId isn't necessarily 
> HdfsServerConstants.INVALID_TXID. We can determine its status directly by 
> EditLogInputStream#isInProgress.
> We introduced [SBN READ], and set 
> {color:#ff0000}{{dfs.ha.tail-edits.in-progress=true}}{color}. Then 
> bootstrapStandby, the EditLogInputStream of inProgress is misjudged, 
> resulting in a gap check failure, which causes bootstrapStandby to fail.
> hdfs namenode -bootstrapStandby
> !image-2022-04-22-17-17-32-487.png|width=766,height=161!
> !image-2022-04-22-17-17-14-577.png|width=598,height=187!



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