Luca Burgazzoli commented on CAMEL-12418:

maybe the issue should also be reported against the underlying consul library 
so this may get fixed on their side

> camel-consul - High CPU load on events watching
> -----------------------------------------------
>                 Key: CAMEL-12418
>                 URL: https://issues.apache.org/jira/browse/CAMEL-12418
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-consul
>    Affects Versions: 2.21.0
>            Reporter: Viachaslau Tsikhanovich
>            Priority: Major
>             Fix For: 2.22.0
> Camel-Consul library expects EventClient to block requests and [passes number 
> of seconds to block request to 
> EventClient|https://github.com/apache/camel/blob/camel-2.21.0/components/camel-consul/src/main/java/org/apache/camel/component/consul/endpoint/ConsulEventConsumer.java#L59].
>  However Event HTTP Endpoint [does not support Blocking 
> Queries|https://www.consul.io/api/event.html] and EventClient [ignores passed 
> queryOptions|https://github.com/rickfast/consul-client/blob/1.1.1/src/main/java/com/orbitz/consul/EventClient.java#L164].
>  This results in high CPU usage because ConsulEventConsumer constantly makes 
> requests to Consul without any delay or blocking.
>  Maybe some _Thread.sleep_ could be added to _EventWatcher.watch(EventClient 
> client)_ before _client.listEvents_ call or any other fix to introduce delay 
> between _listEvents_ requests.

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