Error message "No data from ZK will be returned" on an RSA Security Analytics Warehouse (SAW) node

[#1]

Article Number

000031534

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 error message below is logged on a SAW node.
 

2015-10-12 13:29:56,966 ERROR com.mapr.warden.WardenManager connect [main]: Could not connect to ZK within: 30000 ms. Check if ZK connection defined correctly: saw1:5181,saw2:5181,saw3:5181. No data from ZK will be returned.

Cause

​It is necessary to have more than half of the zookeeper nodes running.

Resolution

To resolve the issue, follow the steps below.

1. Check the qstatus of the nodes using the command below.

   [root@rsa-saw-002 ~]# /etc/init.d/mapr-zookeeper qstatus
   JMX enabled by default
   Using config: /opt/mapr/zookeeper/zookeeper-3.4.5/conf/zoo.cfg
   Mode: leader

2. If the zookeeper nodes are not running but warden is:
   1. Stop the warden service on all nodes with the command below.

      /etc/init.d/mapr-warden stop

   2. Start the zookeeper service on all nodes with the command below.

      /etc/init.d/mapr-zookeeper restart

If you are unsure of any of the steps above or experience any issues, contact RSA Support and quote this article number for further assistance.