How do we authenticate user from http signature secret file

Question

In my Hadoop 2.6.0, I have enabled security authentication. I have set the property hadoop.http.authentication.signature.secret.file for my kerberos authentication.

Property in core-site.xml is as below:

<property>
 <name>hadoop.http.authentication.signature.secret.file</name>
    <value>C:\http-signature.secret</value>
</property>

and the http-signature.secret file is empty.

The authentication working fine. But if I disable this property, so i am getting error while starting nodes.

Can anyone help me in understanding how this Kerberos authentication works?

Answer 1

hadoop.http.authentication.signature.secret.file: The signature secret file for signing the authentication tokens. If not set a random secret is generated at startup time. The same secret should be used for all the nodes in the cluster, JobTracker, NameNode, DataNode & TaskTracker. The default value is ${user.home}/Hadoop-http-auth-signature-secret.

Kindly go through this Apache official documentation:

http://hadoop.apache.org/docs/stable1/HttpAuthentication.html