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https://issues.apache.org/jira/browse/HBASE-10322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871455#comment-13871455
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stack commented on HBASE-10322:
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bq. 1. Send back tags in missing cases also. But sending back visibility
expression/ cell ACL is not correct.
This is tough. The Visibility tags are managed by CPs. When they are not
present, you'd like to not return them? Are tags grouped? Don't send back
system tags?
bq. 2. Don't send back tags in any case. This will a problem when a tool like
ExportTool use the scan to export the table data. We will miss exporting the
cell visibility/ACL.
Can we check perms of the client doing the export? If they have access to
'system' tags, export them? We'd have a ACLCheckingCodec?
bq. 3. Send back tags based on some condition. It has to be per scan basis.
Simplest way is pass some kind of attribute in Scan which says whether to send
back tags or not. But believing some thing what scan specifies might not be
correct IMO. Then comes the way of checking the user who is doing the scan.
When a HBase super user doing the scan then only send back tags. So when a case
comes like Export Tool's the execution should happen from a super user.
Should be super user or some super user-like group if they want tags; else they
don't get them?
> Strip tags from KV while sending back to client on reads
> --------------------------------------------------------
>
> Key: HBASE-10322
> URL: https://issues.apache.org/jira/browse/HBASE-10322
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Blocker
> Fix For: 0.98.0, 0.99.0
>
> Attachments: HBASE-10322.patch
>
>
> Right now we have some inconsistency wrt sending back tags on read. We do
> this in scan when using Java client(Codec based cell block encoding). But
> during a Get operation or when a pure PB based Scan comes we are not sending
> back the tags. So any of the below fix we have to do
> 1. Send back tags in missing cases also. But sending back visibility
> expression/ cell ACL is not correct.
> 2. Don't send back tags in any case. This will a problem when a tool like
> ExportTool use the scan to export the table data. We will miss exporting the
> cell visibility/ACL.
> 3. Send back tags based on some condition. It has to be per scan basis.
> Simplest way is pass some kind of attribute in Scan which says whether to
> send back tags or not. But believing some thing what scan specifies might not
> be correct IMO. Then comes the way of checking the user who is doing the
> scan. When a HBase super user doing the scan then only send back tags. So
> when a case comes like Export Tool's the execution should happen from a super
> user.
> So IMO we should go with #3.
> Patch coming soon.
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