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https://issues.apache.org/jira/browse/HUDI-4192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexey Kudinkin closed HUDI-4192.
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Resolution: Fixed
> HoodieHFileReader scan top cells after bottom cells throw NullPointerException
> ------------------------------------------------------------------------------
>
> Key: HUDI-4192
> URL: https://issues.apache.org/jira/browse/HUDI-4192
> Project: Apache Hudi
> Issue Type: Bug
> Reporter: Hao
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 0.11.1
>
> Attachments: col-stats-0097_86-717-560846_20220605111639266001.hfile
>
>
> Assume we index N columns in the MetaTable, such as col_1, col_2... col_n
> When executing a query that "{*}selects * from table where col_n = 'xx' and
> col1 = 'xx'{*}"".
> In the process of scanning the hfiles of MetaTable, there are acually 2 steps:
> Firstly, the col_n cells will be scanned in the hfile (mainly to obtain the
> minmax), once the scan is completed, the scanner is already at the end of the
> file.
> Secondly, at this time when the cell of the col_1 is scanned, because the
> seekTo is not called in time to back to the file header, it will encounter
> the scanner.getCell to report the NullPointerException exception.
>
> !https://issues.apache.org/vision-file-storage/api/file/download/upload-v2/2022/5/5/h00424960/f2c6fbea023242939c3e804a280cd642/image.png!
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