I don't think so. NN1 and ZKFC1 are one physically separate machines than NN2 and ZKFC2.
From: Chris Mawata [mailto:[email protected]] Sent: Friday, March 14, 2014 9:05 PM To: [email protected] Subject: Re: HA NN Failover question Could you have also prevented the standby from communicating with Zookeeper? Chris On Mar 14, 2014 8:22 PM, "dlmarion" <[email protected]> wrote: I was doing some testing with HA NN today. I set up two NN with active failover (ZKFC) using sshfence. I tested that its working on both NN by doing 'kill -9 <pid>' on the active NN. When I did this on the active node, the standby would become the active and everything seemed to work. Next, I logged onto the active NN and did a 'service network stop' to simulate a NIC/network failure. The standby did not become the active in this scenario. In fact, it remained in standby mode and complained in the log that it could not communicate with (what was) the active NN. I was unable to find anything relevant via searches in Google in Jira. Does anyone have experience successfully testing this? I'm hoping that it is just a configuration problem. FWIW, when the network was restarted on the active NN, it failed over almost immediately. Thanks, Dave
