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https://issues.apache.org/jira/browse/CAMEL-19199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-19199.
---------------------------------
Assignee: Claus Ibsen
Resolution: Fixed
> Unable to start PLC4X route in camel-plc4x
> ------------------------------------------
>
> Key: CAMEL-19199
> URL: https://issues.apache.org/jira/browse/CAMEL-19199
> Project: Camel
> Issue Type: Bug
> Affects Versions: 3.20.2
> Environment: Camel core version : 3.20.2 Camel-PLC4X version : 3.20.2
> IDE - Eclipse, OS - Windows 10, Java 11
> Reporter: Ghazanfar Ali
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 3.20.4, 3.21.0, 4.0-M3, 4.0
>
>
> I am using
> [ModbusPal|https://plc4x.apache.org/users/getting-started/virtual-modbus.html]
> to create the Virtual modbus.
> I am using the endpoint URI as:
>
> {code:java}
> plc4x:modbus-tcp://localhost:502?unitId=1&dataType=holding-register&addresses=1{code}
> Following is the screenshot of Modbus holding registers:
> !https://user-images.githubusercontent.com/62088117/227714761-e6486993-f44a-4482-a7be-e76e5a94b49c.png|width=354,height=350!
> But when starting camel context it throws NullPointerException.
>
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.camel.component.plc4x.Plc4XConsumer.startUnTriggered(Plc4XConsumer.java:89)
> at
> org.apache.camel.component.plc4x.Plc4XConsumer.doStart(Plc4XConsumer.java:81)
> at
> org.apache.camel.support.service.BaseService.start(BaseService.java:119)
> {code}
> I debugged it and found the problem is with this line in PLC4XConsumer line
> 89:
>
> {code:java}
> for (Map.Entry<String, Object> tag : tags.entrySet()) {{code}
>
> Here *tags* are null, so it might be that I am not configuring the endpoint
> correctly.
> So, I tried by configuring the endpoint by creating an instance of
> Plc4XEndpoint and then configuring the tags there, it works like:
> {code:java}
> Map<String, Object> map = new HashMap<>();
> map.put("value-1", "holding-register:1");
>
> Plc4XEndpoint plc4xEndpoint = new
> Plc4XEndpoint("plc4x:modbus-tcp://localhost:502",
> getContext().getComponent("plc4x"));
> plc4xEndpoint.setTags(map);
> from(plc4xEndpoint).log("value : ${body}"); {code}
> But why it is not working if I configure the endpoint as just String?
> Note:
> I tried with below endpoint and it is also not working:
> {code:java}
> plc4x:modbus-tcp://localhost:502?tags={unitId=1&dataType=holding-register&addresses=1}
> {code}
>
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