David Tucker created HDFS-12846:
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Summary: WebHDFS/Jetty misinterprets empty path
Key: HDFS-12846
URL: https://issues.apache.org/jira/browse/HDFS-12846
Project: Hadoop HDFS
Issue Type: Bug
Components: webhdfs
Affects Versions: 2.8.0
Environment: HDP 2.6 + Ambari 2.6.0
Reporter: David Tucker
WebHDFS sees the wrong path when a request does not provide one.
For example, GETFILESTATUS on an empty path results in a FileNotFoundException:
{code}
$ curl -sS -L -w '%{http_code}' -X GET
'http://172.18.0.3:50070/webhdfs/v1?op=GETFILESTATUS&user.name=hdfs'
{"RemoteException":{"exception":"FileNotFoundException","javaClassName":"java.io.FileNotFoundException","message":"File
does not exist: /webhdfs/v1"}}404
{code}
Note the message: the RPC is seeing an incorrect path (/webhdfs/v1).
Because of AMBARI-22492, this leads to unexpected behaviors when deploying with
Ambari:
- GETFILESTATUS is issued as /webhdfs/v1?op=GETFILESTATUS which results in a
FileNotFoundException.
- Since Ambari was told the path doesn't exist, it tries to create it with
MKDIRS (which succeeds!):
{code}
$ curl -sS -L -w '%{http_code}' -X PUT
'http://172.18.0.3:50070/webhdfs/v1?op=MKDIRS&user.name=hdfs'
{"boolean":true}200
{code}
{code}
# hdfs dfs -ls -R /webhdfs
drwx------ - hive hadoop 0 2017-11-20 23:24 /webhdfs/v1
ls: Permission denied: user=root, access=READ_EXECUTE,
inode="/webhdfs/v1":hive:hadoop:drwx------
{code}
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