question Re: 3rd node of 3 node cluster does show up in "cluster" tab of Nifi UI in Support Questions

3rd node of 3 node cluster does show up in "cluster" tab of Nifi UI

hegdemahendra — Wed, 19 Jan 2022 15:37:21 GMT

Hello Experts,

I have a 3 node nifi cluster with host name as nifi-hatest-01, nifi-hatest-02, nifi-hatest-03.

nifi-hatest-01 is primary node at the moment and I can see (in logs) it is receiving heartbeats from 02 & 03.

And if I create flows in any one of the 3 nodes it gets sycned to all nodes.

But the problem now is the 3rd node (nifi-hatest-03) does not show up in the "cluster" tab of Nifi UI.

Any idea what could be the issue?

any suggestion would be much appreciated.

@MattWho @GangWar @smdas

Thanks

Mahendra

Re: 3rd node of 3 node cluster does show up in "cluster" tab of Nifi UI

ckumar — Wed, 19 Jan 2022 16:10:22 GMT

Although 2 nodes showing connected , we should also see the time stamps under column started At and LastHearbeat . also I am expecting to see coordinator and primary under status column.

it is not clear from attached snap, as in from which node you are trying to access the UI ? if you open UI from each node 1,2, and 3 what you see? Is 3rd is showing as disconnected ?

have you checked the process id's of nifi on 3rd node?

How zookeeper is used ? External user or embedded zookeeper ?

Re: 3rd node of 3 node cluster does show up in "cluster" tab of Nifi UI

hegdemahendra — Wed, 19 Jan 2022 16:35:45 GMT

Hi @ckumar - thanks for the reply.

I think that screenshot lacked info may be due to my permission issue.

Same issue has been posted by team mate here - https://community.cloudera.com/t5/Support-Questions/NiFi-Node-showing-2-nodes-and-not-respecting-node-down-fault/td-p/334221

Please take a look at the screenshot attachment there which has more info.

And i can login from all 3 nodes ui, and in all nodes it shows up only 1 & 2.