Editing core-site.xml

About this task

With this option, you update the core-site.xml on each node with a service that runs a web server such as WebServer (Control System), ResourceManager, and HistoryServer nodes. Then, restart the services associated with the web servers. For example, you would need to restart the webserver service on the node that runs the Control System.

Procedure

  1. Add the following configuration to the core-site.xml on each node with a service that runs a web server: 
    <property>
  <name>hadoop.ssl.exclude.cipher.suites</name>
  <value>
SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA,SSL_RSA_EXPORT_WITH_DES40_CBC_SHA,SSL_RSA_EXPORT_WITH_RC4_40_MD5,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,TLS_DHE_DSS_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,TLS_DHE_DSS_WITH_AES_128_CBC_SHA
 </value>
</property>
    • For MapR 3.x clusters, the core-site.xml file is in the following location: /opt/mapr/hadoop/hadoop-0.20.2/conf/
    • For MapR 4.x and 5.x clusters, the core-site.xml file is in the following location: /opt/mapr/hadoop/hadoop-2.x.x/etc/hadoop/
  2. Restart services associated with web servers.
    For example:
    • 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>