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https://issues.apache.org/jira/browse/HBASE-5371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211033#comment-13211033
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Andrew Purtell commented on HBASE-5371:
---------------------------------------
{quote}
bq. It can't because it changes the protocol version of
AccessControllerProtocol.
Right, since we bumped the protocol version, it will be incompatible. [...]
What about re-changing the version to 1, since we just added a new method, but
not changed anything on the wire, it should be compatible. The only catch is
that if you invoke the new API from a new client, but the server is using the
old version, you would get a NoSuchMethod or smt.
{quote}
I've seen this approach used in HDFS. (At least in CDH.) The client can catch
the NoSuchMethodException, set a boolean or similar to note that it is talking
with an older version, and try an alternate strategy.
I think this is a reasonable approach until we have a more general solution for
cross-version (and backwards) RPC compatibility.
> Introduce AccessControllerProtocol.checkPermissions(Permission[] permissons)
> API
> --------------------------------------------------------------------------------
>
> Key: HBASE-5371
> URL: https://issues.apache.org/jira/browse/HBASE-5371
> Project: HBase
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.94.0, 0.92.1
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.94.0
>
> Attachments: HBASE-5371_v2.patch, HBASE-5371_v3-noprefix.patch,
> HBASE-5371_v3.patch
>
>
> We need to introduce something like
> AccessControllerProtocol.checkPermissions(Permission[] permissions) API, so
> that clients can check access rights before carrying out the operations. We
> need this kind of operation for HCATALOG-245, which introduces authorization
> providers for hbase over hcat. We cannot use getUserPermissions() since it
> requires ADMIN permissions on the global/table level.
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