question Re: rest api via knox will get 404 error in Archives of Support Questions (Read Only)

rest api via knox will get 404 error

sen_ke — Fri, 29 Sep 2017 12:51:52 GMT

Hi All,

i want use curl command to access HDFS via Knox, but always response

HTTP/1.1 404 Not Found error.

command example:

and i know how to use curl to create/modify folder or file when url host is Name node with 50070 port, just don't know how to via knox,

if any other configs need to setting?

My Knox version is 0.12

Thanks.

asirna — Fri, 29 Sep 2017 14:02:00 GMT

Do you have webhdfs defined in your topology file?

If you are using sandbox, open /usr/hdp/current/knox-server/conf/topologies/knox_sample.xml and add

<service>
  <role>WEBHDFS</role>
  http://sandbox.hortonworks.com:50070/webhdfs
</service>

If you are not using a sandbox, go to Knox->Configs->Advanced Config->Advanced topology and add

 <service>
     <role>WEBHDFS</role>
    http://<namenode-host>:<namenode-port>/webhdfs
</service>

Thanks,

Aditya

sen_ke — Fri, 29 Sep 2017 14:33:48 GMT

i'm not using sandbox, and after install knox, ambari has auto create default.xml include

<service>
<role>WEBHDFS</role>
{{webhdfs_service_urls}}
</service>

because not work, i tried modified to

<service>
<role>WEBHDFS</role>
<url>http://My_NameNode:50070</url>
</service>

still not work,

now, i tried modify to

<service>
<role>WEBHDFS</role>
<url>http://My_NameNode:50070/webhdfs</url>
</service>

i got another error, anywhere, seens passed 404 not found now,

problem is service url wrong.

Very Thanks for your information.

asirna — Fri, 29 Sep 2017 18:51:11 GMT

can you please accept the answer if it worked for you. This will be helpful for the community.

Thanks,

Aditya