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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17439) Make authentication Token retrieval amenable to coprocessor
Date Wed, 11 Jan 2017 02:40:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15816931#comment-15816931

Gary Helmling commented on HBASE-17439:

That doesn't explain why the remote call needs to be done as the end user.  In general, we
should not be using UGI.doAs() to carry through user identities.  It is better to pass them

> Make authentication Token retrieval amenable to coprocessor
> -----------------------------------------------------------
>                 Key: HBASE-17439
>                 URL: https://issues.apache.org/jira/browse/HBASE-17439
>             Project: HBase
>          Issue Type: Improvement
>          Components: Coprocessors, security
>            Reporter: Ted Yu
> Here is snippet of stack trace from HBASE-17435:
> {code}
>         at org.apache.hadoop.hbase.backup.BackupObserver.preCommitStoreFile(BackupObserver.java:89)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$61.call(RegionCoprocessorHost.java:1494)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionOperation.call(RegionCoprocessorHost.java:1660)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1734)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1692)
>         at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preCommitStoreFile(RegionCoprocessorHost.java:1490)
>         at org.apache.hadoop.hbase.regionserver.HRegion.bulkLoadHFiles(HRegion.java:5512)
>         at org.apache.hadoop.hbase.security.access.SecureBulkLoadEndpoint$1.run(SecureBulkLoadEndpoint.java:293)
>         at org.apache.hadoop.hbase.security.access.SecureBulkLoadEndpoint$1.run(SecureBulkLoadEndpoint.java:276)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:356)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1704)
>         at org.apache.hadoop.hbase.security.access.SecureBulkLoadEndpoint.secureBulkLoadHFiles(SecureBulkLoadEndpoint.java:276)
> {code}
> The ugi obtained from RPC on the server side does not contain required Kerberos credentials
to access hbase table. Hence the need to pass authentication Token from region server onto
the ugi
> In the course of solving HBASE-17435, [~jerryhe] and I noticed that it is cumbersome
for other coprocessor (such as SecureBulkLoadEndpoint) to retrieve authentication Token from
region server.
> Currently a Connection is needed to communicate with TokenProvider. Care is needed not
to introduce dead lock on the server side.
> This JIRA is to investigate feasibility of bypassing Connection / TokenProvider in the
retrieval of authentication Token for custom coprocessor. This involves some refactoring around

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