[
https://issues.apache.org/jira/browse/HIVE-25912?focusedWorklogId=722620&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-722620
]
ASF GitHub Bot logged work on HIVE-25912:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Feb/22 07:31
Start Date: 08/Feb/22 07:31
Worklog Time Spent: 10m
Work Description: baifachuan opened a new pull request #2987:
URL: https://github.com/apache/hive/pull/2987
### What changes were proposed in this pull request?
modify the HiveMetaStore. create_table_core function add this check:
```
if (!MetaStoreUtils.validateTblStorage(tbl.getSd())) {
throw new InvalidObjectException(tbl.getTableName()
+ " location must not be root path");
}
```
If the path.getParent() is NULL we can be sure the location is ROOT path.
the validateTblStorage implements:
```
/*
* Check the table storage location must not be root path.
*/
static public boolean validateTblStorage(StorageDescriptor sd) {
return !(StringUtils.isNotBlank(sd.getLocation())
&& new Path(sd.getLocation()).getParent() == null);
}
```
### Why are the changes needed?
If I create an external table using the ROOT path, the table was created
successfully, but when I drop the table throw the NPE. So I can't drop the
table forever.
This is not a good phenomenon.
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
mvn test -Dtest=SomeTest --pl common
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Issue Time Tracking
-------------------
Worklog Id: (was: 722620)
Remaining Estimate: 82.5h (was: 82h 40m)
Time Spent: 13.5h (was: 13h 20m)
> Drop external table at root of s3 bucket throws NPE
> ---------------------------------------------------
>
> Key: HIVE-25912
> URL: https://issues.apache.org/jira/browse/HIVE-25912
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 3.1.2
> Environment: Hive version: 3.1.2
> Reporter: Fachuan Bai
> Assignee: Fachuan Bai
> Priority: Major
> Labels: metastore, pull-request-available
> Attachments: hive bugs.png
>
> Original Estimate: 96h
> Time Spent: 13.5h
> Remaining Estimate: 82.5h
>
> I create the external hive table using this command:
>
> {code:java}
> CREATE EXTERNAL TABLE `fcbai`(
> `inv_item_sk` int,
> `inv_warehouse_sk` int,
> `inv_quantity_on_hand` int)
> PARTITIONED BY (
> `inv_date_sk` int) STORED AS ORC
> LOCATION
> 'hdfs://emr-master-1:8020/';
> {code}
>
> The table was created successfully, but when I drop the table throw the NPE:
>
> {code:java}
> Error: Error while processing statement: FAILED: Execution Error, return code
> 1 from org.apache.hadoop.hive.ql.exec.DDLTask.
> MetaException(message:java.lang.NullPointerException)
> (state=08S01,code=1){code}
>
> The same bug can reproduction on the other object storage file system, such
> as S3 or TOS:
> {code:java}
> CREATE EXTERNAL TABLE `fcbai`(
> `inv_item_sk` int,
> `inv_warehouse_sk` int,
> `inv_quantity_on_hand` int)
> PARTITIONED BY (
> `inv_date_sk` int) STORED AS ORC
> LOCATION
> 's3a://bucketname/'; // 'tos://bucketname/'{code}
>
> I see the source code found:
> common/src/java/org/apache/hadoop/hive/common/FileUtils.java
> {code:java}
> // check if sticky bit is set on the parent dir
> FileStatus parStatus = fs.getFileStatus(path.getParent());
> if (!shims.hasStickyBit(parStatus.getPermission())) {
> // no sticky bit, so write permission on parent dir is sufficient
> // no further checks needed
> return;
> }{code}
>
> because I set the table location to HDFS root path
> (hdfs://emr-master-1:8020/), so the path.getParent() function will be return
> null cause the NPE.
> I think have four solutions to fix the bug:
> # modify the create table function, if the location is root dir return
> create table fail.
> # modify the FileUtils.checkDeletePermission function, check the
> path.getParent(), if it is null, the function return, drop successfully.
> # modify the RangerHiveAuthorizer.checkPrivileges function of the hive
> ranger plugin(in ranger rep), if the location is root dir return create table
> fail.
> # modify the HDFS Path object, if the URI is root dir, path.getParent()
> return not null.
> I recommend the first or second method, any suggestion for me? thx.
>
>
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