Support Questions

sam6315 · ‎08-23-2016

My cluster have registered hosts but do not added on cluster.

It means that,

I was installed ambari-agent on some hosts.

This hosts registered to ambari-server by changing server hostname on amber-agent.ini

But, I didn't registered on cluster using ambari web UI.

Some times later, when i was checked ambari-server log, ambari server still check this host's heartbeat.

"WARN [ambari-hearbeat-monitor] HeartbeatMonitor:154 - Heartbeat lost from host hostname"

how can i remove this hosts?

sganatra · ‎08-23-2016

You have a "hoststate" and/or "hosts" table in ambari database which might have an entry of that hostsname which will give you that WARN [ambari-hearbeat-monitor] HeartbeatMonitor:154 - Heartbeat lost from host hostname" on every ambari-server restart is performed as it checks those tables. You might want to have a check if the entry exists then remove those entries by stopping the ambari-server and stopping the ambari-agent of those host which gives you that warning.

Because if the ambari-agent is in running state then you will see the same issue again.

View solution in original post

sam6315 · ‎08-24-2016

You could remove via delete statement in psql..

1) Removing table entries in hoststate : Delete from hoststate where host_id=xx

2) Removing table entries from hosts : Delete from hosts where host_id=xx

And restart ambari-server

thx. It works.

sganatra · ‎08-23-2016

You could remove via delete statement in psql..

1) Removing table entries in hoststate : Delete from hoststate where host_id=xx

2) Removing table entries from hosts : Delete from hosts where host_id=xx

And restart ambari-server

dpnctl · ‎01-02-2017

I restarted the ambari-agent services and was able to reregister we also have an option of ambari-agent reset hdp_server_name this was also required on other 2 hosts

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Support Questions

How can i remove registered host but do not added.