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https://issues.apache.org/jira/browse/HBASE-867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628210#action_12628210
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stack commented on HBASE-867:
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It looks like we should be breaking out of the main while loop in the next
method after we pass out a column match -- because store keys are sorted -- but
then we fall on the next while loop which just nexts until we hit the next row.
Normally this is fine, if only a few columns in a row, but in Daniel's case its
taking forever to move to the next row.
Also, we won't split a region if only one row so its looking like his store
files are large, 1G.
> If millions of columns in a column family, hbase scanner won't come up
> ----------------------------------------------------------------------
>
> Key: HBASE-867
> URL: https://issues.apache.org/jira/browse/HBASE-867
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
>
> Our Daniel has uploaded a table that has a column family with millions of
> columns in it. He can get items from the table promptly specifying row and
> column. Scanning is another matter. Thread dumping I see we're stuck in the
> scanner constructor nexting through cells.
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