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https://issues.apache.org/jira/browse/NIFI-1208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Grande updated NIFI-1208:
--------------------------------
    Description: 
I've installed today's NiFI 0.4.0 snapshot on the latest Raspberry PI and 
configured a syslog listener. After forwarding my RPI syslogs to this NiFi 
listener, things seem to work ok (for now just sending to a remote cluster for 
collection).

However, 'top' shows that the nifi process taxes CPU at around 150%, varying.  
ListenSyslog stats show 1,500,000 tasks per a sliding 5min window.

*Setup*: create a ListenSyslog on port 10001.
As a root:
# edit */etc/rsyslog.conf* file and add {noformat}*.*    
@127.0.0.1:10001{noformat} at the end
# service rsyslog restart

You can send test messages to syslog like this:
{noformat}logger "This is the test message!"{noformat}


  was:
I've installed today's NiFI 0.4.0 snapshot on the latest Raspberry PI and 
configured a syslog listener. After forwarding my RPI syslogs to this NiFi 
listener, things seem to work ok (for now just sending to a remote cluster for 
collection).

However, 'top' shows that the nifi process taxes CPU at around 150%, varying.  
ListenSyslog stats show 1,500,000 tasks per a sliding 5min window.


> ListenSyslog spin-loops CPU, spikes load to 150%
> ------------------------------------------------
>
>                 Key: NIFI-1208
>                 URL: https://issues.apache.org/jira/browse/NIFI-1208
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 0.4.0
>         Environment: Raspbian Jessie (Debian-based), Raspberry PI 2, 1GHz x 
> 4cores, 1GB RAM, Oracle JDK 8 for ARM 
>            Reporter: Andrew Grande
>            Priority: Critical
>
> I've installed today's NiFI 0.4.0 snapshot on the latest Raspberry PI and 
> configured a syslog listener. After forwarding my RPI syslogs to this NiFi 
> listener, things seem to work ok (for now just sending to a remote cluster 
> for collection).
> However, 'top' shows that the nifi process taxes CPU at around 150%, varying. 
>  ListenSyslog stats show 1,500,000 tasks per a sliding 5min window.
> *Setup*: create a ListenSyslog on port 10001.
> As a root:
> # edit */etc/rsyslog.conf* file and add {noformat}*.*    
> @127.0.0.1:10001{noformat} at the end
> # service rsyslog restart
> You can send test messages to syslog like this:
> {noformat}logger "This is the test message!"{noformat}



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