Hi Gayan,
Is HA enabled in event-processor.xml? Also is pageVisitsReceiver receiver
deployed in both servers?
On Wed, Jun 14, 2017 at 4:34 PM Gayan Yalpathwala <[email protected]> wrote:

> Hi team,
>
> I have configured a DAS 3.1.0 minimum HA setup as per
> https://docs.wso2.com/display/CLUSTER44x/Minimum+High+Availability+Deployment+-+DAS+3.1.0
> .
> Please note that all analytics datasources are pointed to an HBase
> cluster. I am publishing a large number of events to both the nodes
> (client-side load balanced) from an ESB proxy service using PublishEvent
> mediator. Here, I observed on DAS end, exactly half of the events are not
> getting persisted and below error is thrown multiple times on DAS master
> node.
>
> TID: [-1234] [] [2017-06-14 09:32:49,673] ERROR
> {org.wso2.carbon.event.processor.manager.core.internal.EventHandler} -
>  Unable to process events for tenant :-1234 on
> stream:/Receiver/PageVisitsReceiver
> {org.wso2.carbon.event.processor.manager.core.internal.EventHandler}
> java.lang.NullPointerException
> at
> org.wso2.carbon.event.receiver.core.internal.management.QueueInputEventDispatcher.process(QueueInputEventDispatcher.java:102)
> at
> org.wso2.carbon.event.processor.manager.core.internal.EventHandler$1.receive(EventHandler.java:161)
> at
> org.wso2.carbon.event.processor.manager.commons.transport.server.TCPEventServer$ServerWorker$ListenerProcessor.run(TCPEventServer.java:234)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748)
>
> Any thoughts on this behavior?
>
> Thanks,
>
> --
> *Gayan Kaushalya Yalpathwala*
> Senior Software Engineer
> WSO2 Inc.; http://wso2.com
> lean.enterprise.middleware
>
> LK: +94 71 868 2704
> US: +1 650 695 2324
>
> <http://asia14.wso2con.com/>
>
-- 
Gimantha Bandara
Software Engineer
WSO2. Inc : http://wso2.com
Mobile : +94714961919
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