Zen Load Balancer 3.03 - Error in content3-3 cgi execution, see ZEN logs

UPDATE: Zen Load Balancer 3.05 has been released and resolves the issue mentioned below. http://www.zenloadbalancer.com/downloads/

"... Improvements:
[gui] HTTP farm client request timeout with unit “seconds”
[gui] Refreshing timeout for farms status view
[cluster] Improved RSA synchronization
[gui] Advise message regarding no cluster configuration found
 ..." - http://www.zenloadbalancer.com/changelog/#August_26_2014_Zen_Load_Balancer_v305

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With the open source 3.03 version of ZenLB, I believe I've isolated one cause for the "Error in content3-3 cgi execution, see ZEN logs" message when attempting to configure a Cluster and using the "Configure RSA connection between nodes" button.

I reported the bug to http://zenloadbalancer.sourceforge.net/bugs and been told “[t]hat is a bug that is solved for the next 3.05 version” by J. Robels.

Reproducing the error:

1. Configure two new Zen load balancers – TestLB1 and TestLB2
2. Connect them in a cluster
3. Disconnect the cluster
4. Rebuild the OS for TestLB2 with an identical configuration – IP address and settings
5. Attempt to configure a cluster again between the Zen load balancers TestLB1 and TestLB2 from TestLB1’s admin interface
6. You will get "Error in content3-3 cgi execution, see ZEN logs" using the "Configure RSA connection between nodes" button
   
   
   

Cause:

• The SSH keys on TestLB1 /root/.ssh/known_hosts file is no longer valid for referencing TestLB2.
   

Workaround prior to ZenLB 3.05:

• Delete the /root/.ssh/known_hosts file from TestLB1.
   
  

You will now get the "SUCCESS! Running process for configure RSA communication. " when pressing the "Configure RSA connection between nodes" button.