webHDFS API returns Exception on every query

Question

I setuped single node Hadoop cluster to perform some experiments with HDFS. Via web access all looks good, I created a dedicated folder and copied file from local system to it using command line. It all appeared in web UI. After it I to get access to it via WebHDFS. For example:

curl -i "http://127.0.0.1:50075/webhdfs/v1/?op=LISTSTATUS"

But after that I get:

HTTP/1.1 400 Bad Request
Content-Type: application/json; charset=utf-8
Content-Length: 154
Connection: close
{
    "RemoteException":
    {
        "exception":"IllegalArgumentException",
        "javaClassName":"java.lang.IllegalArgumentException",
        "message":"Invalid operation LISTSTATUS"
    }
}

The same error I receive on any another command.

I have no idea what went wrong here. Can it be caused for example by missing some components or anything else during setup?

which hadoop distribution you are using? HDP, CDH or something else? — Sandesh Jain, Aug 24 '16 at 17:01
For HDP default port for webhdfs is 50070 and curl -i "http://x.x.x.x:50070/webhdfs/v1/?op=LISTSTATUS" works for me — Sandesh Jain, Aug 24 '16 at 17:02
Thanks it works. I use distribution from official site http://hadoop.apache.org/#Download+Hadoop . — Anton Rybakov, Aug 24 '16 at 17:11
@SandeshJain your answer worked for me too. You could add it as a proper answer, so OP can mark it as resolved. — davneetnarang, Oct 04 '16 at 11:42
I also want to setup Hadoop web hdfs on ubunto. can you help me out - @AntonRybakov — Ashish Sharma, Jul 03 '20 at 10:30

score 4 · Accepted Answer · answered Oct 04 '16 at 12:57

4

For HDP you can use following URL (with default port):

http://x.x.x.x:50070/webhdfs/v1/?op=LISTSTATUS

For MapR cluster (with default port):

http://x.x.x.x:14000/webhdfs/v1/user?op=LISTSTATUS&user.name=YOUR_USER

answered Oct 04 '16 at 12:57

Sandesh Jain

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webHDFS API returns Exception on every query

1 Answers1