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From Mark Payne <>
Subject Re: site-to-site timeout
Date Mon, 08 Jan 2018 18:58:54 GMT

That does sound correct. The code would be probably be either in the nifi-site-to-site-client
or the in the StandardRemoteGroupPort, within the nifi-framework-core module. It's been a
while since
I've looked at 0.x, so it's hard to say for sure.

In 1.x, this is a non-issue. The site-to-site client will iterate through all nodes in the
remote cluster, attempting
to connect to each of them to determine the cluster topology. If it fails to connect to any
of them, it will then
try again after a bit, until it is finally successful.


> On Jan 8, 2018, at 1:29 PM, Mark Bean <> wrote:
> It was observed in Apache NiFi 0.x that when the NCM goes down or becomes
> unavailable, data being sent to the cluster via site-to-site continues to
> flow to the Nodes for 24 hours. There is a state file
> NIFI_HOME/conf/state/{RPG-UUID}.peers. When this file becomes > 24 hours
> old, the site-to-site communication finally stops.
> First, can you confirm this is an accurate observation? Second, where in
> the code can I find this? Lastly, and most importantly, does this behavior
> apply to 1.x since there is no longer an NCM?
> Thanks,
> Mark

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