# Send Event is not getting triggered when a event response comes

**URL:** <https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965>\
**Category:** Flowable Engine\
**Created:** [May 5, 2020, 6:14pm UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965 "2020-05-05T18:14:22Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![sukalpo](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/sukalpo/32/1143_2.png) [@sukalpo](https://forum.flowable.org/u/sukalpo)\
**Post date:** [May 5, 2020, 6:14pm UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965/1 "2020-05-05T18:14:22Z")

</div>

Hi All,

The following is my xml

```
    <?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:flowable="http://flowable.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="Examples">
  <process id="eventTest" name="Process to test events" isExecutable="true">
    <startEvent id="theStart">
      <extensionElements>
        <flowable:eventType xmlns:flowable="http://flowable.org/bpmn"><![CDATA[carparkEnterEvent]]></flowable:eventType>
        <flowable:eventOutParameter xmlns:flowable="http://flowable.org/bpmn" source="vehicleNumber" sourceType="string" target="vehicleNumber"></flowable:eventOutParameter>
        <flowable:eventOutParameter xmlns:flowable="http://flowable.org/bpmn" source="carpark" sourceType="string" target="carpark"></flowable:eventOutParameter>
      </extensionElements>
    </startEvent>
    <sequenceFlow id="flow1" sourceRef="theStart" targetRef="theTask"></sequenceFlow>
    <serviceTask id="theTask" name="event test task" flowable:async="true" flowable:delegateExpression="${testTask}"></serviceTask>
    <sequenceFlow id="flow2" sourceRef="theTask" targetRef="sendTestEvent"></sequenceFlow>
    <endEvent id="theEnd"></endEvent>
    <serviceTask id="sendTestEvent" name="send test event and wait for result" flowable:type="send-event" flowable:triggerable="true">
      <extensionElements>
        <flowable:eventType><![CDATA[sendEvent]]></flowable:eventType>
        <flowable:triggerEventType><![CDATA[sendEventResult]]></flowable:triggerEventType>
        <flowable:eventInParameter sourceExpression="${carpark}" target="carpark" targetType="string"></flowable:eventInParameter>
        <flowable:eventInParameter sourceExpression="${vehicleNumber}" target="vehicleNumber" targetType="string"></flowable:eventInParameter>
        <flowable:eventOutParameter source="carpark" sourceType="string" target="carpark"></flowable:eventOutParameter>
        <flowable:eventOutParameter source="vehicleNumber" sourceType="string" target="vehicleNumber"></flowable:eventOutParameter>
        <flowable:triggerEventCorrelationParameter xmlns:flowable="http://flowable.org/bpmn" name="carpark" type="string" value="carpark"></flowable:triggerEventCorrelationParameter>
      </extensionElements>
    </serviceTask>
    <sequenceFlow id="sid-71CB497F-69A2-4F5C-B71F-2CF67D95C87C" sourceRef="sendTestEvent" targetRef="sid-3769205C-80F8-4368-828B-A24ACCB4ED23"></sequenceFlow>
    <serviceTask id="sid-3769205C-80F8-4368-828B-A24ACCB4ED23" name="last task" flowable:async="true" flowable:delegateExpression="${testTask}"></serviceTask>
    <sequenceFlow id="sid-23AFBF1E-FC7F-4B7B-A37D-CC80D3217265" sourceRef="sid-3769205C-80F8-4368-828B-A24ACCB4ED23" targetRef="theEnd"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_eventTest">
    <bpmndi:BPMNPlane bpmnElement="eventTest" id="BPMNPlane_eventTest">
      <bpmndi:BPMNShape bpmnElement="theStart" id="BPMNShape_theStart">
        <omgdc:Bounds height="30.0" width="30.5" x="0.0" y="115.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="theTask" id="BPMNShape_theTask">
        <omgdc:Bounds height="60.0" width="100.0" x="80.0" y="100.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="theEnd" id="BPMNShape_theEnd">
        <omgdc:Bounds height="28.0" width="28.0" x="585.0" y="116.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sendTestEvent" id="BPMNShape_sendTestEvent">
        <omgdc:Bounds height="80.0" width="100.0" x="225.0" y="90.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="sid-3769205C-80F8-4368-828B-A24ACCB4ED23" id="BPMNShape_sid-3769205C-80F8-4368-828B-A24ACCB4ED23">
        <omgdc:Bounds height="60.0" width="100.0" x="390.0" y="100.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="30.449973236872857" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="42.0" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="42.0" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="79.99999999997692" y="130.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="179.94999999999072" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="224.99999999998067" y="130.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-23AFBF1E-FC7F-4B7B-A37D-CC80D3217265" id="BPMNEdge_sid-23AFBF1E-FC7F-4B7B-A37D-CC80D3217265">
        <omgdi:waypoint x="489.95000000000005" y="130.0"></omgdi:waypoint>
        <omgdi:waypoint x="585.0" y="130.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="sid-71CB497F-69A2-4F5C-B71F-2CF67D95C87C" id="BPMNEdge_sid-71CB497F-69A2-4F5C-B71F-2CF67D95C87C">
        <omgdi:waypoint x="324.94999999999976" y="129.71441320838912"></omgdi:waypoint>
        <omgdi:waypoint x="389.9999999999981" y="129.34286479250335"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

```

These are my event files

```
{
  "key": "carparkEnterEvent",
  "name": "Carpark Enter",
  "inboundChannelKeys": [
    "carparkenterChannel"
  ],
  "correlationParameters": [],
  "payload": [
    {
      "name": "vehicleNumber",
      "type": "string"
    },
    {
      "name": "carpark",
      "type": "string"
    }
  ]
}

{
  "key": "sendEvent",
  "name": "Send Event",
  "outboundChannelKeys": [
      "sendEventOutboundChannel"
   ],
  "correlationParameters": [],
  "payload": [
    {
      "name": "vehicleNumber",
      "type": "string"
    },
    {
      "name": "carpark",
      "type": "string"
    }
  ]
}

{
  "key": "sendEventResult",
  "name": "Send Event Result",
  "inboundChannelKeys": [
      "sendEventResultChannel"
    ],
  "correlationParameters": [
    {
      "name": "carpark",
      "type": "string"
    }
  ],
  "payload": [
    {
      "name": "vehicleNumber",
      "type": "string"
    },
    {
      "name": "carpark",
      "type": "string"
    }
  ]
}

```

And these are my channel files

```
{
  "key": "carparkenterChannel",
  "name": "Carpark Enter channel",
  "description": "Carpark Enter Channel",
  "channelType": "inbound",
  "type": "kafka",
  "deserializerType": "json",
  "channelEventKeyDetection": {
    "fixedValue": "carparkEnterEvent"
  },
  "topics": ["LPRS_CARPARK_ENTER_JSON"]
}

{
  "key": "sendEventOutboundChannel",
  "name": "Send Event Outbound channel",
  "description": "Send Event Outbound channel",
  "channelType": "outbound",
  "type": "kafka",
  "serializerType": "json",
  "topic": "SEND_EVENT"
}

{
  "key": "sendEventResultChannel",
  "name": "Send Event Result channel",
  "description": "Send Event Result Channel",
  "channelType": "inbound",
  "type": "kafka",
  "deserializerType": "json",
  "channelEventKeyDetection": {
    "fixedValue": "sendEventResult"
  },
  "topics": ["SEND_EVENT_RESULT"]
}

```

I can trigger the process by sending a message to LPRS\_CARPARK\_ENTER topic and the send-event svc task is also producing a message at SEND\_EVENT topic. But when I am pushing a message to SEND\_EVENT\_RESULT topic to simulate a response, the svc task is not triggered and the process just sits there and does not move to the last task before the end event

Please help and thanks all in advance.

---

<div class="post-metadata">

**Author:** ![filiphr](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/filiphr/32/315_2.png) [@filiphr](https://forum.flowable.org/u/filiphr)\
**Post date:** [May 6, 2020, 8:00am UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965/2 "2020-05-06T08:00:17Z")

</div>

Hey @sukalpo,

How does the message you are pushing to `SEND_EVENT_RESULT` look like?

The “send test event and wait for result” task will wait for a message that has a `carpark` property with value `carpark`.

Is the message consumed by the Flowable consumer? You can put a breakpoint in `KafkaChannelMessageListenerAdapter#onMessage(ConsumerRecord)` and wait for the message to arrive.

Cheers,  
Filip

---

<div class="post-metadata">

**Author:** ![sukalpo](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/sukalpo/32/1143_2.png) [@sukalpo](https://forum.flowable.org/u/sukalpo)\
**Post date:** [May 6, 2020, 8:11am UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965/3 "2020-05-06T08:11:18Z")

</div>

Hi @filiphr,

I am using the below to the topic through a rest proxy

```
{
	"records": [
		{
			"value": {
				"vehicleNumber": "123",
				"carpark": "2A"
			}
		}
	]
}

```

I dont have a flowable consumer. I am expecting that as soon as the send-event task gets the messages from the topic it will go to the n ext task which is “the last task”. I will put a breakpoint and let you know.

---

<div class="post-metadata">

**Author:** ![filiphr](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/filiphr/32/315_2.png) [@filiphr](https://forum.flowable.org/u/filiphr)\
**Post date:** [May 6, 2020, 8:40am UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965/4 "2020-05-06T08:40:32Z")

</div>

Hey @sukalpo,

So the value of `carpark` is `2A`. However, your “send test event and wait for result” should only be triggered when the value of `carpark` is `carpark`

That is coming from

```auto
<flowable:triggerEventCorrelationParameter name="carpark" type="string" value="carpark"></flowable:triggerEventCorrelationParameter>

```

What you probably want is to use the `carpark` variable from the process instance. For that you need to use an expression like `${carpark}`.

Your XML should look like:

```auto
<flowable:triggerEventCorrelationParameter name="carpark" type="string" value="${carpark}"></flowable:triggerEventCorrelationParameter>

```

---

<div class="post-metadata">

**Author:** ![sukalpo](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/sukalpo/32/1143_2.png) [@sukalpo](https://forum.flowable.org/u/sukalpo)\
**Post date:** [May 6, 2020, 8:42am UTC](https://forum.flowable.org/t/send-event-is-not-getting-triggered-when-a-event-response-comes/5965/5 "2020-05-06T08:42:39Z")

</div>

Ah ok. Let me quickly do the change and test this out. Loads of thanks to you!