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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/12050/
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(Updated July 19, 2013, 6:55 p.m.)
Review request for hive, Ashutosh Chauhan and Sushanth Sowmyan.
Bugs: HIVE- and HIVE-3756
https://issues.apache.org/jira/browse/HIVE-
https://issues.apache.org/jira/browse/HIVE-3756
Repository: hive-git
Description
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Problems:
1. When doing load data or insert overwrite to a table, the data files under
database/table directory could not inherit their parent's permissions (i.e.
group) as described in HIVE-3756.
2. Beside the group issue, the read/write permission mode is also not inherited
3. Same problem affects the partition files (see HIVE-3094)
Cause:
The task results (from load data or insert overwrite) are initially stored in
scratchdir and then loaded under warehouse table directory. FileSystem.rename
is used in this step (e.g. LoadTable/LoadPartition) to move the dirs/files but
it preserves their permissions (including group and mode) which are determined
by scratchdir permission or umask. If the scratchdir has different permissions
from those of warehouse table directories, the problem occurs.
Solution:
After the FileSystem.rename is called, changing all renamed (moved) files/dirs
to their destination parents' permissions if needed (say if
hive.warehouse.subdir.inherit.perms is true). Here I introduced a new method
renameFile doing both rename and permission. It replaces the FileSystem.rename
used in LoadTable/LoadPartition. I do not replace rename used to move
files/dirs under same scratchdir in the middle of task processing. It looks to
me not necessary since they are temp files and also probably access protected
by top scratchdir mode 700 (HIVE-4487).
Diffs
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ql/src/java/org/apache/hadoop/hive/ql/metadata/Hive.java 87a584d
Diff: https://reviews.apache.org/r/12050/diff/
Testing
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The following cases tested that all created subdirs/files inherit their
parents' permission mode and group in : 1). create database; 2). create table;
3). load data; 4) insert overwrite; 5) partitions.
{code}
hive> dfs -ls -d /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:20
/user/tester1/hive
hive> create database tester1 COMMENT 'Database for user tester1' LOCATION
'/user/tester1/hive/tester1.db';
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:21
/user/tester1/hive/tester1.db
hive> use tester1;
hive> create table tester1.tst1(col1 int, col2 string) ROW FORMAT DELIMITED
FIELDS TERMINATED BY ',' STORED AS TEXTFILE;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:22
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:22
/user/tester1/hive/tester1.db/tst1
hive> load data local inpath '/home/tester1/tst1.input' into table tst1;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:22
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1
-rw-rw---- 3 tester1 testgroup123 168 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1/tst1.input
hive> create table tester1.tst2(col1 int, col2 string) ROW FORMAT DELIMITED
FIELDS TERMINATED BY ',' STORED AS SEQUENCEFILE;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:24
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1
-rw-rw---- 3 tester1 testgroup123 168 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1/tst1.input
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:24
/user/tester1/hive/tester1.db/tst2
hive> insert overwrite table tst2 select * from tst1;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:25
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1
-rw-rw---- 3 tester1 testgroup123 168 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1/tst1.input
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2
-rw-rw---- 3 tester1 testgroup123 291 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2/000000_0
hive> create table tester1.tst3(col2 string) PARTITIONED BY (col1 int) ROW
FORMAT DELIMITED FIELDS TERMINATED BY ',' STORED AS TEXTFILE;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:27
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1
-rw-rw---- 3 tester1 testgroup123 168 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1/tst1.input
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2
-rw-rw---- 3 tester1 testgroup123 291 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2/000000_0
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:27
/user/tester1/hive/tester1.db/tst3
hive> set hive.exec.dynamic.partition.mode=nonstrict;
hive> insert overwrite table tester1.tst3 partition (col1) select t1.col2,
t1.col1 from tst1 t1;
hive> dfs -ls -R /user/tester1/hive;
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:27
/user/tester1/hive/tester1.db
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1
-rw-rw---- 3 tester1 testgroup123 168 2013-06-22 13:23
/user/tester1/hive/tester1.db/tst1/tst1.input
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2
-rw-rw---- 3 tester1 testgroup123 291 2013-06-22 13:25
/user/tester1/hive/tester1.db/tst2/000000_0
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=1111
-rw-rw---- 3 tester1 testgroup123 51 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=1111/000000_0
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=2222
-rw-rw---- 3 tester1 testgroup123 51 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=2222/000000_0
drwxrwx--- - tester1 testgroup123 0 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=3333
-rw-rw---- 3 tester1 testgroup123 51 2013-06-22 13:28
/user/tester1/hive/tester1.db/tst3/col1=3333/000000_0
{code}
Thanks,
Chaoyu Tang
