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https://issues.apache.org/jira/browse/HBASE-10925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13966305#comment-13966305
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Mikhail Antonov commented on HBASE-10925:
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my 2 cents..may be go not by num of columns, but by total size of row (in
bytes), and either compare that with configurable threshold (not more than 2
gb), or with fraction of the JVM/RS node memory available (like not more than
20% thereof)?
> Do not OOME, throw RowTooBigException instead
> ---------------------------------------------
>
> Key: HBASE-10925
> URL: https://issues.apache.org/jira/browse/HBASE-10925
> Project: HBase
> Issue Type: Bug
> Reporter: stack
>
> If 10M columns in a row, throw a RowTooBigException rather than OOME when
> Get'ing or Scanning w/o in-row scan flag set.
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