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https://issues.apache.org/jira/browse/NIFI-4905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph Witt updated NIFI-4905:
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Summary: If cluster response time is slow - there isn't enough information
to help the operator know why (was: Cluster response time is slow)
> If cluster response time is slow - there isn't enough information to help the
> operator know why
> -----------------------------------------------------------------------------------------------
>
> Key: NIFI-4905
> URL: https://issues.apache.org/jira/browse/NIFI-4905
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core UI
> Affects Versions: 1.5.0
> Environment: Centos 7.3
> NiFi 1.5.0 Cluster with 8 physical nodes
> Reporter: Josef Zahner
> Priority: Major
> Attachments: cpu_load_nifi.PNG, root_canvas.png
>
>
> we are actually working on a PoC with 8 nodes (HP BL460c Blades, 24 Cores,
> 44GB RAM) in a NiFi 1.5.0 cluster. Our configuration has about 160 processors
> and all of them are stopped. Even in the stopped state, we are constantly
> getting the messages below for all nodes, not only for the primary node.
> {code:java}
> Response time from nifi2-07.xyz.ch:8080 was slow for each of the last 3
> requests made. To see more information about timing, enable DEBUG logging for
> org.apache.nifi.cluster.coordination.http.replication.ThreadPoolRequestReplicator
> {code}
> If you are on the root canvas, you feel that it takes a few seconds until it
> response after a refresh. We have already tuned the parameters below, but
> without any luck. After restart of NiFi it is fine for a few minutes, but
> then the messages return.
> {code:java}
> nifi.cluster.protocol.heartbeat.interval=15 sec
> nifi.cluster.node.protocol.threads=40
> nifi.cluster.node.protocol.max.threads=80
> nifi.cluster.node.connection.timeout=60 sec
> nifi.cluster.node.read.timeout=60 sec
> {code}
> The nodes have absolutely no load beside of NiFi. What surprised me was, that
> when the UI refreshs (default every 30s) it produces about 20% cpu load on my
> machine. And remember, it's a 24x2.9GHz blade server.
> !cpu_load_nifi.PNG!
> That's a picture of my root canvas:
> !root_canvas.png!
> Actually we can't work with the cluster under this circumstances because the
> gui always gets so slow.
> Is this a bug or normal behavior? Do we have to many elements on the GUI or
> what could cause this issue?
> Cheers
>
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