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https://issues.apache.org/jira/browse/KUDU-2157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wong updated KUDU-2157:
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Affects Version/s: 1.6.0
> 1.5 -> 1.4 -> 1.5 downgrade/re-upgrade can result in non-startable tservers
> ---------------------------------------------------------------------------
>
> Key: KUDU-2157
> URL: https://issues.apache.org/jira/browse/KUDU-2157
> Project: Kudu
> Issue Type: Bug
> Components: fs, tserver
> Affects Versions: 1.4.0, 1.5.0, 1.6.0
> Reporter: Todd Lipcon
> Priority: Major
> Fix For: 1.7.0
>
>
> I had a cluster running 1.5, which I then downgraded to 1.4 and ran for a
> while (including tablet copies happening). I then upgraded back to 1.5, but
> the tservers would not start.
> The issue is that the tablet-meta files on 1.5 had gotten invalid path IDs
> written into them during tablet copies that occurred on 1.4. The 1.4 servers
> had copied a remote TabletMeta file, and preserved the unknown protobuf field
> and serialized it locally. Then when we upgraded again, they failed to
> validate since they didn't match the local path UUIDs.
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