Exception thrown with trigger at Start

[pcnfernando]

Description:
When a Siddhi app which has a trigger defined at startup is started the below exception is thrown.

[2019-10-09_17-34-43_175] ERROR {io.siddhi.core.stream.output.sink.Sink} - Error on 'StartupTrigger'. Dropping event at Sink 'log' at 'logStream' as its still trying to reconnect!, events dropped 'Event{timestamp=1570622683174, data=[startup triggered], isExpired=false}' (Encoded)

Affected Siddhi Version:
v5.1.7

Steps to reproduce:
Start the below Siddhi App

@App:name("StartupTrigger")

@App:description("Generate an event at SiddhiApp startup.")

@sink(type='log')
define stream logStream (eventABC string);

define trigger InitTrigger at 'start';

-- Once the app has started, insert an event into LogStream as 'startup triggered'
from InitTrigger
select 'startup triggered' as eventABC
insert into logStream;