Chiran Ravani created HIVE-22758:
------------------------------------

             Summary: Create database with permission error when doas set to 
true
                 Key: HIVE-22758
                 URL: https://issues.apache.org/jira/browse/HIVE-22758
             Project: Hive
          Issue Type: Improvement
          Components: Standalone Metastore
    Affects Versions: 3.1.0, 3.0.0
            Reporter: Chiran Ravani
            Assignee: Chiran Ravani


With doAs set to true, running create database on external location fails due 
to permission denied to write on directory specified for hive user (User with 
HMS is running).

Steps to reproduce the issue:
1. Turn on, Hive run as end-user to true.
2. Connect to hive as some user other than admin, eg:- chiran
3. Create a database with external location
{code}
create database externaldbexample location '/user/chiran/externaldbexample'
{code}

The above statement fails with HDFS write permission denied error as below.

{code}
> create database externaldbexample location '/user/chiran/externaldbexample';
INFO  : Compiling 
command(queryId=hive_20200122043626_5c95e1fd-ce00-45fd-b58d-54f5e579f87d): 
create database externaldbexample location '/user/chiran/externaldbexample'
INFO  : Semantic Analysis Completed (retrial = false)
INFO  : Returning Hive schema: Schema(fieldSchemas:null, properties:null)
INFO  : Completed compiling 
command(queryId=hive_20200122043626_5c95e1fd-ce00-45fd-b58d-54f5e579f87d); Time 
taken: 1.377 seconds
INFO  : Executing 
command(queryId=hive_20200122043626_5c95e1fd-ce00-45fd-b58d-54f5e579f87d): 
create database externaldbexample location '/user/chiran/externaldbexample'
INFO  : Starting task [Stage-0:DDL] in serial mode
ERROR : FAILED: Execution Error, return code 1 from 
org.apache.hadoop.hive.ql.exec.DDLTask. 
MetaException(message:java.lang.reflect.UndeclaredThrowableException)
INFO  : Completed executing 
command(queryId=hive_20200122043626_5c95e1fd-ce00-45fd-b58d-54f5e579f87d); Time 
taken: 0.238 seconds
Error: Error while processing statement: FAILED: Execution Error, return code 1 
from org.apache.hadoop.hive.ql.exec.DDLTask. 
MetaException(message:java.lang.reflect.UndeclaredThrowableException) 
(state=08S01,code=1)
{code}

>From Hive Metastore service log, below is seen.

{code}
2020-01-22T04:36:27,870 WARN  [pool-6-thread-6]: metastore.ObjectStore 
(ObjectStore.java:getDatabase(1010)) - Failed to get database 
hive.externaldbexample, returning NoSuchObjectExcept
ion
2020-01-22T04:36:27,898 INFO  [pool-6-thread-6]: metastore.HiveMetaStore 
(HiveMetaStore.java:run(1339)) - Creating database path in managed directory 
hdfs://c470-node2.squadron.support.
hortonworks.com:8020/user/chiran/externaldbexample
2020-01-22T04:36:27,903 INFO  [pool-6-thread-6]: utils.FileUtils 
(FileUtils.java:mkdir(170)) - Creating directory if it doesn't exist: 
hdfs://namenodeaddress:8020/user/chiran/externaldbexample
2020-01-22T04:36:27,932 ERROR [pool-6-thread-6]: utils.MetaStoreUtils 
(MetaStoreUtils.java:logAndThrowMetaException(169)) - Got exception: 
org.apache.hadoop.security.AccessControlException Permission denied: user=hive, 
access=WRITE, inode="/user/chiran":chiran:chiran:drwxr-xr-x
        at 
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:399)
        at 
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:255)
        at 
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:193)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1859)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1843)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkAncestorAccess(FSDirectory.java:1802)
        at 
org.apache.hadoop.hdfs.server.namenode.FSDirMkdirOp.mkdirs(FSDirMkdirOp.java:59)
        at 
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.mkdirs(FSNamesystem.java:3150)
        at 
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.mkdirs(NameNodeRpcServer.java:1126)
        at 
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.mkdirs(ClientNamenodeProtocolServerSideTranslatorPB.java:707)
        at 
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
        at 
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
{code}


The behaviour looks to be a regression of HIVE-20001.

Can we add a check to see if the external path specified by a user, then create 
DB directory as end-user instead of hive service user?

Attaching patch, which was tested locally on Hive 3.1



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