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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-19052) FixedFileTrailer should recognize CellComparatorImpl class in branch-1.x
Date Thu, 09 Nov 2017 01:59:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-19052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-19052:
-----------------------------------
    Fix Version/s: 1.4.0

> FixedFileTrailer should recognize CellComparatorImpl class in branch-1.x
> ------------------------------------------------------------------------
>
>                 Key: HBASE-19052
>                 URL: https://issues.apache.org/jira/browse/HBASE-19052
>             Project: HBase
>          Issue Type: Improvement
>          Components: HFile
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Critical
>             Fix For: 1.4.0, 1.3.2, 1.2.7, 1.1.13
>
>         Attachments: 19052.branch-1.txt
>
>
> HBASE-18945 has gone into branch-2 .
> Let's consider rolling upgrade scenario from 1.x to 2.0 where there're three servers:
s1, s2, s3
> s1 is upgraded to 2.0 first. It flushes to hfile in region r1 with CellComparatorImpl
written in the hfile trailer.
> Somehow s1 crashes and master assigns r1 to s2 which is still running 1.x
> The following code in FixedFileTrailer would be triggered:
> {code}
>       try {
>         comparatorKlass = (Class<? extends CellComparator>) Class.forName(comparatorClassName);
>       } catch (ClassNotFoundException e) {
>         throw new IOException(e);
>       }
> {code}
> since s2 is not aware of CellComparatorImpl.
> This issue is to backport CellComparatorImpl related change to branch-1.x
> Note: CellComparatorImpl wouldn't be used in write path, only in read path.



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