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https://issues.apache.org/jira/browse/HBASE-13527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-13527:
--------------------------
Fix Version/s: 0.98.12
1.0.2
> The default value for hbase.client.scanner.max.result.size is never actually
> set on Scans
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-13527
> URL: https://issues.apache.org/jira/browse/HBASE-13527
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.0.0, 2.0.0, 1.1.0, 0.98.12, 1.2.0
> Reporter: Jonathan Lawlor
> Assignee: Jonathan Lawlor
> Fix For: 2.0.0, 1.1.0, 0.98.12, 1.0.2
>
> Attachments: HBASE-13527-0.98.patch, HBASE-13527-v1.patch
>
>
> Now that max result size is driven from the client side like caching
> (HBASE-13362), we also need to set Scan.maxResultSize to the default value of
> hbase.client.scanner.max.result.size which is never performed. I think this
> has gone unnoticed because the server used to read the configuration
> hbase.client.scanner.max.result.size for itself, but now we expect the
> serialized Scan sent from the client side to contain this information.
> Realistically this should have been set on the Scans even before HBASE-13362,
> it's surprising that it's not as the scanner code seems to indicate otherwise.
> Ultimately, the end result is that, by default, scan RPC's are limited by
> hbase.server.scanner.max.result.size (note this is the new server side config
> not the client side config) which has a default value of 100 MB. The scan
> RPC's should instead be limited by hbase.client.scanner.max.result.size which
> has a default value of 2 MB.
> The reason why this issue occurs is because, by default, a new Scan()
> initializes Scan.maxResultSize to -1. This initial value of -1 will never be
> changed unless Scan#setMaxResultSize() is called. In the event that this
> value is not changed, the Scan that is serialized and sent to the server will
> also have Scan.maxResultSize = -1. Then, when the server is deciding what
> size limit should be enforced, it sees that Scan.maxResultSize = -1 so it
> uses the most relaxed size restriction possible, which is
> hbase.server.scanner.max.result.size (default value 100 MB).
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