Article Content
Article Number | 000031538 |
Applies To | RSA Product Set: Security Analytics RSA Product/Service Type: MapR Warehouse (SAW) RSA Version/Condition: 10.4.x, 10.5.x Platform: CentOS O/S Version: EL6 |
Issue | The wrong hostname on the loopback interface can cause problems creating the mapred volumes in the Security Analytics Warehouse (SAW). When attempting to create the volume, the error message below will be logged. 2015-08-11 11:24:48,700 ERROR org.apache.hadoop.mapred.TaskTracker: Can not start TaskTracker because org.apache.hadoop.util.Shell$ExitCodeException: Failed to create local mapred volume. |
Resolution | It is common to have a wrong hostname configured on the appliance. To confirm this, issue the command below. [root@rsa-saw-002 ~]# getent hosts If you do not get the expected output from the hostname command or the getent command, correct the host and DNS settings on the node. A common problem is an incorrect loopback entry (127.0.x.x), which prevents the correct IP address from being assigned to the hostname. |