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https://issues.apache.org/jira/browse/HBASE-21012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16574223#comment-16574223
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Chia-Ping Tsai commented on HBASE-21012:
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{quote}Then, you just write a test to make sure it can read that old HFile
version.
{quote}
[~elserj] Sorry, I used the wrong term. This issue is about the forward
compatibility rather than backward compatibility. The older hbase can't read
hfiles generated by later versions.
> Revert the change of serializing TimeRangeTracker
> -------------------------------------------------
>
> Key: HBASE-21012
> URL: https://issues.apache.org/jira/browse/HBASE-21012
> Project: HBase
> Issue Type: Sub-task
> Reporter: Chia-Ping Tsai
> Assignee: Kuan-Po Tseng
> Priority: Critical
> Fix For: 3.0.0, 2.0.2, 2.1.1
>
> Attachments: HBASE-21012.master.001.patch,
> HBASE-21012.master.002.patch, HBASE-21012.master.003.patch,
> HBASE-21012.master.003.patch, HBASE-21012.master.004.patch
>
>
> HBASE-18754 change the serialization of TimeRangeTracker from "manual way" to
> protobuf. However, the change breaks the backward compatibility of hfile. We
> should revert the change ASAP.
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