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https://issues.apache.org/jira/browse/HUDI-9376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HUDI-9376:
---------------------------------
Labels: pull-request-available (was: )
> Allow for archived instants pre Hudi 0.8 to be readable by latest
> ArchivedTimeline api
> --------------------------------------------------------------------------------------
>
> Key: HUDI-9376
> URL: https://issues.apache.org/jira/browse/HUDI-9376
> Project: Apache Hudi
> Issue Type: Bug
> Reporter: Alex Rhee
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.1.0
>
>
> There is some backwards compatibility issues with reading archived timeline
> instants pre 0.8.
> - 1st issue is that Avro was upgraded in 0.12 to a version which does not
> allow for default Union to be null. This breaks reading these old instants in
> HoodieDataBlock.
> - 2nd issue is that it is possible for archived instants to have same
> timestamp for different actions, especially given that older versions used
> seconds for instant rather than milliseconds. However the archived timeline
> does not assume this and assumes each instant has unique timestamp.
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