Requirement to Enable Insecure Protocols

MapR disables insecure protocols by default. For example, TLSv1 and SSLv3 are disabled by default due to their associated security risks. In the event that your client environment or crypto libraries cannot be upgraded, you can decide to enable insecure protocols.
NOTE Enabling insecure protocols is not recommended as the security of communications between the browser and web server is put at risk.
To enable insecure protocols:
  1. Based on your requirements, add one of the following configurations to the core-site.xml file on each node with a service that runs a web server:
    • To enable SSLv3: 
      <property>
 <name>hadoop.ssl.exclude.insecure.protocols</name>
 <value>SSLV3</value>
</property>
    • To enable TLSv1:
      <property>
 <name>hadoop.ssl.exclude.insecure.protocols</name>
 <value>TLSV1</value>
</property>
    • To enable all insecure protocols that MapR disables by default:
      <property>
 <name>hadoop.ssl.exclude.insecure.protocols</name>
 <value></value>
</property

    The core-site.xml is in the following location: /opt/mapr/hadoop/hadoop-2.x.x/etc/hadoop/

  2. Restart services associated with web servers.
    Examples:
    • To restart the Control System webserver: 
         maprcli node services -webserver restart -nodes <webserver nodes>
    • To restart the ResourceManager service(s):
      maprcli node services -name resourcemanager -action restart -nodes <space delimited list of resourcemanager nodes>