Stephen O'Donnell created HDFS-13170:
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Summary: Port webhdfs unmaskedpermission parameter to HTTPFS
Key: HDFS-13170
URL: https://issues.apache.org/jira/browse/HDFS-13170
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Stephen O'Donnell
HDFS-6962 fixed a long standing issue where default ACLs are not correctly
applied to files when they are created from the hadoop shell.
With this change, if you create a file with default ACLs against the parent
directory, with dfs.namenode.posix.acl.inheritance.enabled=false, the result is:
{code}
# file: /test_acl/file_from_shell_off
# owner: user1
# group: supergroup
user::rw-
user:user1:rwx #effective:r--
user:user2:rwx #effective:r--
group::r-x #effective:r--
group:users:rwx #effective:r--
mask::r--
other::r--
{code}
And if you enable this, to fix the bug above, the result is as you would expect:
{code}
# file: /test_acl/file_from_shell
# owner: user1
# group: supergroup
user::rw-
user:user1:rwx #effective:rw-
user:user2:rwx #effective:rw-
group::r-x #effective:r--
group:users:rwx #effective:rw-
mask::rw-
other::r--
{code}
If I then create a file over HTTPFS or webHDFS, the behaviour is not the same
as above:
{code}
# file: /test_acl/default_permissions
# owner: user1
# group: supergroup
user::rwx
user:user1:rwx #effective:r-x
user:user2:rwx #effective:r-x
group::r-x
group:users:rwx #effective:r-x
mask::r-x
other::r-x
{code}
Notice the mask is set to r-x and this remove the write permission on the new
file.
As part of HDFS-6962 a new parameter was added to webhdfs 'unmaskedpermission'.
By passing it to a webhdfs call, it can result in the same behaviour as when a
file is written from the CLI:
{code}
curl -i -X PUT -T test.txt --header "Content-Type:application/octet-stream"
"http://host-10-17-103-28.coe.cloudera.comnamenode:50075/webhdfs/v1/test_acl/unmasked__770?op=CREATE&user.name=user1&namenoderpcaddress=namenode:8020&overwrite=false&unmaskedpermission=770";
# file: /test_acl/unmasked__770
# owner: user1
# group: supergroup
user::rwx
user:user1:rwx
user:user2:rwx
group::r-x
group:users:rwx
mask::rwx
other::---
{code}
However, this parameter was never ported to HTTPFS.
This Jira is to replicate the same changes to HTTPFS so this parameter is
available there too.
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