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https://issues.apache.org/jira/browse/HBASE-2156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12803782#action_12803782
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stack commented on HBASE-2156:
------------------------------
+1
> HBASE-2037 broke Scan
> ---------------------
>
> Key: HBASE-2156
> URL: https://issues.apache.org/jira/browse/HBASE-2156
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.20.3
> Reporter: Jean-Daniel Cryans
> Assignee: Jean-Daniel Cryans
> Priority: Blocker
> Fix For: 0.20.3
>
> Attachments: HBASE-2156.patch
>
>
> Paul Ambrose wrote to the mailing list about some tests he has that doesn't
> pass on 0.20.3RC1-2. Looking into the issue it appears that this modification:
> {code}
> public Scan addFamily(byte [] family) {
> familyMap.remove(family);
> - familyMap.put(family, null);
> + familyMap.put(family, EMPTY_NAVIGABLE_SET);
> return this;
> }
> {code}
> Makes it that when you use addColumn after that you put qualifiers into
> EMPTY_NAVIGABLE_SET which is static hence shared among all scanners after
> that like META scanners when calling tableExists.
> This was introduced by HBASE-2037.
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